/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 15:26:34,472 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 15:26:34,474 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 15:26:34,504 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-08-06 15:26:34,565 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 15:26:34,565 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 15:26:34,566 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 15:26:34,567 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe.epf [2021-08-06 15:26:34,597 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 15:26:34,597 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 15:26:34,598 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-08-06 15:26:34,598 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-08-06 15:26:34,600 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 15:26:34,600 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 15:26:34,600 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 15:26:34,600 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 15:26:34,600 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 15:26:34,600 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 15:26:34,601 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 15:26:34,601 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 15:26:34,601 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 15:26:34,601 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 15:26:34,601 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 15:26:34,601 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 15:26:34,601 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 15:26:34,602 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 15:26:34,602 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 15:26:34,602 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 15:26:34,602 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 15:26:34,602 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 15:26:34,602 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 15:26:34,602 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:26:34,602 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 15:26:34,603 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 15:26:34,603 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 15:26:34,603 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 15:26:34,603 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 15:26:34,603 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 15:26:34,603 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 15:26:34,603 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 15:26:34,844 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 15:26:34,860 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 15:26:34,861 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 15:26:34,862 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 15:26:34,863 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 15:26:34,863 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl [2021-08-06 15:26:34,864 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl' [2021-08-06 15:26:34,899 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 15:26:34,900 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 15:26:34,900 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 15:26:34,901 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 15:26:34,901 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 15:26:34,908 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:26:34" (1/1) ... [2021-08-06 15:26:34,913 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:26:34" (1/1) ... [2021-08-06 15:26:34,918 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 15:26:34,919 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 15:26:34,920 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 15:26:34,920 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 15:26:34,925 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:26:34" (1/1) ... [2021-08-06 15:26:34,926 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:26:34" (1/1) ... [2021-08-06 15:26:34,927 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:26:34" (1/1) ... [2021-08-06 15:26:34,927 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:26:34" (1/1) ... [2021-08-06 15:26:34,929 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:26:34" (1/1) ... [2021-08-06 15:26:34,930 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:26:34" (1/1) ... [2021-08-06 15:26:34,931 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:26:34" (1/1) ... [2021-08-06 15:26:34,932 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 15:26:34,932 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 15:26:34,932 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 15:26:34,932 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 15:26:34,942 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:26:34" (1/1) ... [2021-08-06 15:26:34,948 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 15:26:34,953 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:34,965 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) [2021-08-06 15:26:34,989 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 [2021-08-06 15:26:34,999 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 15:26:34,999 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 15:26:34,999 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 15:26:34,999 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 15:26:34,999 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 15:26:34,999 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 15:26:34,999 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 15:26:35,000 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 15:26:35,000 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 15:26:35,000 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 15:26:35,000 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 15:26:35,000 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 15:26:35,001 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-06 15:26:35,201 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 15:26:35,201 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 15:26:35,202 INFO L202 PluginConnector]: Adding new model multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:26:35 BoogieIcfgContainer [2021-08-06 15:26:35,203 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 15:26:35,204 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 15:26:35,204 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 15:26:35,206 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 15:26:35,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 03:26:34" (1/2) ... [2021-08-06 15:26:35,206 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@74a3ae2c and model type multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 03:26:35, skipping insertion in model container [2021-08-06 15:26:35,206 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 03:26:35" (2/2) ... [2021-08-06 15:26:35,207 INFO L111 eAbstractionObserver]: Analyzing ICFG multiply-verify.wvr.bpl [2021-08-06 15:26:35,211 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 15:26:35,211 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 15:26:35,211 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 15:26:35,211 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 15:26:35,269 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 15:26:35,315 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 15:26:35,322 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 [2021-08-06 15:26:35,323 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 15:26:35,342 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 41 places, 33 transitions, 90 flow [2021-08-06 15:26:35,384 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 369 states, 368 states have (on average 2.75) internal successors, (1012), 368 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:35,386 INFO L276 IsEmpty]: Start isEmpty. Operand has 369 states, 368 states have (on average 2.75) internal successors, (1012), 368 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:35,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:26:35,401 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:35,402 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:35,402 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:35,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:35,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1658439404, now seen corresponding path program 1 times [2021-08-06 15:26:35,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:35,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79526071] [2021-08-06 15:26:35,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:35,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:35,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:35,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:35,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79526071] [2021-08-06 15:26:35,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79526071] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:26:35,717 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:26:35,717 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 15:26:35,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948345834] [2021-08-06 15:26:35,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 15:26:35,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:35,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 15:26:35,729 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:26:35,730 INFO L87 Difference]: Start difference. First operand has 369 states, 368 states have (on average 2.75) internal successors, (1012), 368 states have internal predecessors, (1012), 0 states have call successors, (0), 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 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:35,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:35,839 INFO L93 Difference]: Finished difference Result 349 states and 846 transitions. [2021-08-06 15:26:35,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 15:26:35,840 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:26:35,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:35,858 INFO L225 Difference]: With dead ends: 349 [2021-08-06 15:26:35,858 INFO L226 Difference]: Without dead ends: 311 [2021-08-06 15:26:35,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 54.5ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:26:35,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-08-06 15:26:35,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 293. [2021-08-06 15:26:35,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 2.482876712328767) internal successors, (725), 292 states have internal predecessors, (725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:35,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 725 transitions. [2021-08-06 15:26:35,909 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 725 transitions. Word has length 22 [2021-08-06 15:26:35,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:35,909 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 725 transitions. [2021-08-06 15:26:35,910 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:35,910 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 725 transitions. [2021-08-06 15:26:35,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:26:35,911 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:35,911 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:35,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 15:26:35,911 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:35,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:35,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1887438146, now seen corresponding path program 2 times [2021-08-06 15:26:35,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:35,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656394125] [2021-08-06 15:26:35,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:35,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:35,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:36,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:36,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:36,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656394125] [2021-08-06 15:26:36,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656394125] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:26:36,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:26:36,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 15:26:36,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073606024] [2021-08-06 15:26:36,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 15:26:36,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:36,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 15:26:36,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:26:36,058 INFO L87 Difference]: Start difference. First operand 293 states and 725 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:36,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:36,141 INFO L93 Difference]: Finished difference Result 333 states and 800 transitions. [2021-08-06 15:26:36,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:26:36,141 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:26:36,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:36,143 INFO L225 Difference]: With dead ends: 333 [2021-08-06 15:26:36,143 INFO L226 Difference]: Without dead ends: 296 [2021-08-06 15:26:36,144 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.9ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:26:36,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-08-06 15:26:36,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 220. [2021-08-06 15:26:36,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 2.3926940639269407) internal successors, (524), 219 states have internal predecessors, (524), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:36,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 524 transitions. [2021-08-06 15:26:36,168 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 524 transitions. Word has length 22 [2021-08-06 15:26:36,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:36,169 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 524 transitions. [2021-08-06 15:26:36,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:36,169 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 524 transitions. [2021-08-06 15:26:36,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:26:36,170 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:36,170 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:36,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 15:26:36,170 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:36,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:36,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1291332230, now seen corresponding path program 3 times [2021-08-06 15:26:36,170 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:36,171 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4118559] [2021-08-06 15:26:36,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:36,171 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:36,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:36,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4118559] [2021-08-06 15:26:36,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4118559] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:26:36,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:26:36,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 15:26:36,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285147915] [2021-08-06 15:26:36,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 15:26:36,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:36,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 15:26:36,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:26:36,272 INFO L87 Difference]: Start difference. First operand 220 states and 524 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:36,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:36,330 INFO L93 Difference]: Finished difference Result 320 states and 768 transitions. [2021-08-06 15:26:36,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:26:36,331 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:26:36,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:36,332 INFO L225 Difference]: With dead ends: 320 [2021-08-06 15:26:36,333 INFO L226 Difference]: Without dead ends: 280 [2021-08-06 15:26:36,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:26:36,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2021-08-06 15:26:36,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 218. [2021-08-06 15:26:36,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 218 states, 217 states have (on average 2.3824884792626726) internal successors, (517), 217 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:36,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 218 states to 218 states and 517 transitions. [2021-08-06 15:26:36,346 INFO L78 Accepts]: Start accepts. Automaton has 218 states and 517 transitions. Word has length 22 [2021-08-06 15:26:36,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:36,346 INFO L470 AbstractCegarLoop]: Abstraction has 218 states and 517 transitions. [2021-08-06 15:26:36,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:36,347 INFO L276 IsEmpty]: Start isEmpty. Operand 218 states and 517 transitions. [2021-08-06 15:26:36,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:26:36,348 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:36,348 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:36,348 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 15:26:36,348 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:36,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:36,349 INFO L82 PathProgramCache]: Analyzing trace with hash -1690979538, now seen corresponding path program 4 times [2021-08-06 15:26:36,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:36,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071766302] [2021-08-06 15:26:36,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:36,349 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:36,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:36,473 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:36,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:36,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071766302] [2021-08-06 15:26:36,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1071766302] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:26:36,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:26:36,474 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 15:26:36,474 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068459462] [2021-08-06 15:26:36,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 15:26:36,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:36,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 15:26:36,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:26:36,475 INFO L87 Difference]: Start difference. First operand 218 states and 517 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:36,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:36,540 INFO L93 Difference]: Finished difference Result 327 states and 775 transitions. [2021-08-06 15:26:36,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 15:26:36,541 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:26:36,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:36,542 INFO L225 Difference]: With dead ends: 327 [2021-08-06 15:26:36,542 INFO L226 Difference]: Without dead ends: 290 [2021-08-06 15:26:36,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:26:36,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2021-08-06 15:26:36,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 226. [2021-08-06 15:26:36,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 2.3866666666666667) internal successors, (537), 225 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:36,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 537 transitions. [2021-08-06 15:26:36,549 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 537 transitions. Word has length 22 [2021-08-06 15:26:36,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:36,549 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 537 transitions. [2021-08-06 15:26:36,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:36,550 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 537 transitions. [2021-08-06 15:26:36,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:26:36,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:36,550 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:36,550 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-08-06 15:26:36,550 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:36,551 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:36,551 INFO L82 PathProgramCache]: Analyzing trace with hash 1090722866, now seen corresponding path program 5 times [2021-08-06 15:26:36,551 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:36,551 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667037768] [2021-08-06 15:26:36,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:36,551 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:36,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:36,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:36,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:36,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667037768] [2021-08-06 15:26:36,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667037768] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:26:36,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:26:36,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 15:26:36,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177105924] [2021-08-06 15:26:36,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 15:26:36,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:36,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 15:26:36,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:26:36,688 INFO L87 Difference]: Start difference. First operand 226 states and 537 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:36,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:36,795 INFO L93 Difference]: Finished difference Result 333 states and 810 transitions. [2021-08-06 15:26:36,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:26:36,795 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:26:36,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:36,797 INFO L225 Difference]: With dead ends: 333 [2021-08-06 15:26:36,797 INFO L226 Difference]: Without dead ends: 296 [2021-08-06 15:26:36,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 55.7ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:26:36,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 296 states. [2021-08-06 15:26:36,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 296 to 242. [2021-08-06 15:26:36,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 241 states have (on average 2.4356846473029043) internal successors, (587), 241 states have internal predecessors, (587), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:36,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 587 transitions. [2021-08-06 15:26:36,802 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 587 transitions. Word has length 22 [2021-08-06 15:26:36,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:36,803 INFO L470 AbstractCegarLoop]: Abstraction has 242 states and 587 transitions. [2021-08-06 15:26:36,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:36,803 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 587 transitions. [2021-08-06 15:26:36,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 15:26:36,803 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:36,803 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:36,803 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-06 15:26:36,804 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:36,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:36,804 INFO L82 PathProgramCache]: Analyzing trace with hash -150120722, now seen corresponding path program 6 times [2021-08-06 15:26:36,804 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:36,804 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341174778] [2021-08-06 15:26:36,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:36,804 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:36,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:36,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:36,910 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:36,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341174778] [2021-08-06 15:26:36,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341174778] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:26:36,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:26:36,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-06 15:26:36,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [273280205] [2021-08-06 15:26:36,911 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 15:26:36,911 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:36,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 15:26:36,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:26:36,911 INFO L87 Difference]: Start difference. First operand 242 states and 587 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:36,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:36,981 INFO L93 Difference]: Finished difference Result 337 states and 817 transitions. [2021-08-06 15:26:36,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:26:36,981 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 15:26:36,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:36,983 INFO L225 Difference]: With dead ends: 337 [2021-08-06 15:26:36,983 INFO L226 Difference]: Without dead ends: 297 [2021-08-06 15:26:36,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 39.9ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:26:36,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2021-08-06 15:26:36,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 224. [2021-08-06 15:26:36,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 2.3856502242152464) internal successors, (532), 223 states have internal predecessors, (532), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:36,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 532 transitions. [2021-08-06 15:26:36,993 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 532 transitions. Word has length 22 [2021-08-06 15:26:36,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:36,997 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 532 transitions. [2021-08-06 15:26:36,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:36,997 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 532 transitions. [2021-08-06 15:26:36,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:26:36,998 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:36,998 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:36,998 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-08-06 15:26:36,998 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:36,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:36,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1597116146, now seen corresponding path program 1 times [2021-08-06 15:26:36,998 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:36,998 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784943381] [2021-08-06 15:26:36,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:36,999 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:37,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:37,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784943381] [2021-08-06 15:26:37,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784943381] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:37,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1579752150] [2021-08-06 15:26:37,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:37,041 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:37,041 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:37,045 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) [2021-08-06 15:26:37,048 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-06 15:26:37,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:37,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 15:26:37,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:37,261 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:37,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1579752150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:37,261 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:37,261 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 15:26:37,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [12972519] [2021-08-06 15:26:37,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 15:26:37,261 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:37,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 15:26:37,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:26:37,262 INFO L87 Difference]: Start difference. First operand 224 states and 532 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:37,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:37,319 INFO L93 Difference]: Finished difference Result 342 states and 809 transitions. [2021-08-06 15:26:37,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:26:37,320 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 15:26:37,320 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:37,321 INFO L225 Difference]: With dead ends: 342 [2021-08-06 15:26:37,321 INFO L226 Difference]: Without dead ends: 342 [2021-08-06 15:26:37,321 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 33.5ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:26:37,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-08-06 15:26:37,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 213. [2021-08-06 15:26:37,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.4245283018867925) internal successors, (514), 212 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:37,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 514 transitions. [2021-08-06 15:26:37,326 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 514 transitions. Word has length 25 [2021-08-06 15:26:37,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:37,326 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 514 transitions. [2021-08-06 15:26:37,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:37,326 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 514 transitions. [2021-08-06 15:26:37,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:26:37,327 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:37,327 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:37,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:37,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:37,541 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:37,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:37,541 INFO L82 PathProgramCache]: Analyzing trace with hash 1392515280, now seen corresponding path program 1 times [2021-08-06 15:26:37,541 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:37,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609003840] [2021-08-06 15:26:37,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:37,542 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:37,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:37,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:37,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:37,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609003840] [2021-08-06 15:26:37,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609003840] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:26:37,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:26:37,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 15:26:37,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097241305] [2021-08-06 15:26:37,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 15:26:37,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:37,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 15:26:37,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:26:37,569 INFO L87 Difference]: Start difference. First operand 213 states and 514 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:37,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:37,606 INFO L93 Difference]: Finished difference Result 361 states and 847 transitions. [2021-08-06 15:26:37,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 15:26:37,607 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:26:37,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:37,608 INFO L225 Difference]: With dead ends: 361 [2021-08-06 15:26:37,608 INFO L226 Difference]: Without dead ends: 337 [2021-08-06 15:26:37,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 19.9ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:26:37,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-08-06 15:26:37,612 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 213. [2021-08-06 15:26:37,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 2.400943396226415) internal successors, (509), 212 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:37,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 509 transitions. [2021-08-06 15:26:37,613 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 509 transitions. Word has length 25 [2021-08-06 15:26:37,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:37,613 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 509 transitions. [2021-08-06 15:26:37,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:37,613 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 509 transitions. [2021-08-06 15:26:37,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:26:37,614 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:37,614 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:37,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2021-08-06 15:26:37,614 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:37,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:37,614 INFO L82 PathProgramCache]: Analyzing trace with hash -292030640, now seen corresponding path program 2 times [2021-08-06 15:26:37,614 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:37,614 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228432775] [2021-08-06 15:26:37,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:37,614 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:37,638 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:37,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:37,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228432775] [2021-08-06 15:26:37,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228432775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:37,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050273444] [2021-08-06 15:26:37,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:26:37,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:37,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:37,639 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) [2021-08-06 15:26:37,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-06 15:26:37,688 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:26:37,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:37,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 15:26:37,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:37,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:37,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050273444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:37,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:37,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 15:26:37,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322003777] [2021-08-06 15:26:37,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 15:26:37,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:37,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 15:26:37,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:26:37,840 INFO L87 Difference]: Start difference. First operand 213 states and 509 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:37,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:37,909 INFO L93 Difference]: Finished difference Result 495 states and 1157 transitions. [2021-08-06 15:26:37,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 15:26:37,909 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:26:37,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:37,911 INFO L225 Difference]: With dead ends: 495 [2021-08-06 15:26:37,911 INFO L226 Difference]: Without dead ends: 495 [2021-08-06 15:26:37,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 43.9ms TimeCoverageRelationStatistics Valid=51, Invalid=81, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:26:37,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 495 states. [2021-08-06 15:26:37,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 495 to 221. [2021-08-06 15:26:37,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.4318181818181817) internal successors, (535), 220 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:37,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 535 transitions. [2021-08-06 15:26:37,917 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 535 transitions. Word has length 25 [2021-08-06 15:26:37,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:37,918 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 535 transitions. [2021-08-06 15:26:37,918 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:37,918 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 535 transitions. [2021-08-06 15:26:37,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:26:37,918 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:37,918 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:37,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:38,133 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,SelfDestructingSolverStorable8 [2021-08-06 15:26:38,133 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:38,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:38,133 INFO L82 PathProgramCache]: Analyzing trace with hash -502727686, now seen corresponding path program 2 times [2021-08-06 15:26:38,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:38,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756554416] [2021-08-06 15:26:38,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:38,134 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:38,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:38,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:38,174 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:38,174 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756554416] [2021-08-06 15:26:38,174 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756554416] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:26:38,174 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:26:38,174 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 15:26:38,174 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503891574] [2021-08-06 15:26:38,174 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 15:26:38,174 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:38,175 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 15:26:38,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:26:38,175 INFO L87 Difference]: Start difference. First operand 221 states and 535 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:38,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:38,227 INFO L93 Difference]: Finished difference Result 341 states and 802 transitions. [2021-08-06 15:26:38,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 15:26:38,228 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:26:38,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:38,229 INFO L225 Difference]: With dead ends: 341 [2021-08-06 15:26:38,229 INFO L226 Difference]: Without dead ends: 335 [2021-08-06 15:26:38,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 44.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:26:38,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-08-06 15:26:38,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 245. [2021-08-06 15:26:38,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 2.4385245901639343) internal successors, (595), 244 states have internal predecessors, (595), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:38,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 595 transitions. [2021-08-06 15:26:38,235 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 595 transitions. Word has length 25 [2021-08-06 15:26:38,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:38,235 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 595 transitions. [2021-08-06 15:26:38,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:38,235 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 595 transitions. [2021-08-06 15:26:38,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:26:38,236 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:38,236 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:38,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-08-06 15:26:38,236 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:38,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:38,236 INFO L82 PathProgramCache]: Analyzing trace with hash 226024132, now seen corresponding path program 3 times [2021-08-06 15:26:38,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:38,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285192341] [2021-08-06 15:26:38,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:38,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:38,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:38,289 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:38,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:38,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285192341] [2021-08-06 15:26:38,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285192341] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:26:38,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:26:38,290 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 15:26:38,290 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316850138] [2021-08-06 15:26:38,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 15:26:38,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:38,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 15:26:38,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:26:38,290 INFO L87 Difference]: Start difference. First operand 245 states and 595 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:38,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:38,346 INFO L93 Difference]: Finished difference Result 284 states and 686 transitions. [2021-08-06 15:26:38,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 15:26:38,346 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:26:38,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:38,347 INFO L225 Difference]: With dead ends: 284 [2021-08-06 15:26:38,347 INFO L226 Difference]: Without dead ends: 284 [2021-08-06 15:26:38,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 21.4ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:26:38,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2021-08-06 15:26:38,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 221. [2021-08-06 15:26:38,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.422727272727273) internal successors, (533), 220 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:38,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 533 transitions. [2021-08-06 15:26:38,352 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 533 transitions. Word has length 25 [2021-08-06 15:26:38,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:38,352 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 533 transitions. [2021-08-06 15:26:38,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:38,353 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 533 transitions. [2021-08-06 15:26:38,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:26:38,353 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:38,353 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:38,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2021-08-06 15:26:38,353 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:38,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:38,354 INFO L82 PathProgramCache]: Analyzing trace with hash -150947022, now seen corresponding path program 3 times [2021-08-06 15:26:38,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:38,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109525260] [2021-08-06 15:26:38,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:38,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:38,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:38,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:38,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109525260] [2021-08-06 15:26:38,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109525260] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:26:38,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:26:38,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 15:26:38,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092547617] [2021-08-06 15:26:38,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 15:26:38,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:38,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 15:26:38,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:26:38,396 INFO L87 Difference]: Start difference. First operand 221 states and 533 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:38,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:38,454 INFO L93 Difference]: Finished difference Result 394 states and 930 transitions. [2021-08-06 15:26:38,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:26:38,454 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:26:38,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:38,455 INFO L225 Difference]: With dead ends: 394 [2021-08-06 15:26:38,455 INFO L226 Difference]: Without dead ends: 387 [2021-08-06 15:26:38,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 27.7ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:26:38,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 387 states. [2021-08-06 15:26:38,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 387 to 221. [2021-08-06 15:26:38,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 2.4136363636363636) internal successors, (531), 220 states have internal predecessors, (531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:38,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 531 transitions. [2021-08-06 15:26:38,460 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 531 transitions. Word has length 25 [2021-08-06 15:26:38,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:38,461 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 531 transitions. [2021-08-06 15:26:38,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:38,461 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 531 transitions. [2021-08-06 15:26:38,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:26:38,461 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:38,461 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:38,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2021-08-06 15:26:38,461 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:38,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:38,462 INFO L82 PathProgramCache]: Analyzing trace with hash 81147160, now seen corresponding path program 4 times [2021-08-06 15:26:38,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:38,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005888964] [2021-08-06 15:26:38,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:38,462 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:38,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:38,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:38,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:38,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005888964] [2021-08-06 15:26:38,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005888964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:38,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796595307] [2021-08-06 15:26:38,504 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:26:38,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:38,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:38,504 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) [2021-08-06 15:26:38,542 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-06 15:26:38,570 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:26:38,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:38,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 15:26:38,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:38,686 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:38,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796595307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:38,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:38,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-06 15:26:38,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [942034827] [2021-08-06 15:26:38,688 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-06 15:26:38,688 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:38,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-06 15:26:38,693 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-06 15:26:38,693 INFO L87 Difference]: Start difference. First operand 221 states and 531 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:38,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:38,758 INFO L93 Difference]: Finished difference Result 340 states and 811 transitions. [2021-08-06 15:26:38,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:26:38,759 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-06 15:26:38,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:38,760 INFO L225 Difference]: With dead ends: 340 [2021-08-06 15:26:38,760 INFO L226 Difference]: Without dead ends: 340 [2021-08-06 15:26:38,760 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 42.4ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:26:38,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 340 states. [2021-08-06 15:26:38,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 340 to 209. [2021-08-06 15:26:38,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.4278846153846154) internal successors, (505), 208 states have internal predecessors, (505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:38,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 505 transitions. [2021-08-06 15:26:38,764 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 505 transitions. Word has length 25 [2021-08-06 15:26:38,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:38,765 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 505 transitions. [2021-08-06 15:26:38,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:38,765 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 505 transitions. [2021-08-06 15:26:38,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:26:38,765 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:38,765 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:38,783 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-08-06 15:26:38,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:38,982 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:38,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:38,982 INFO L82 PathProgramCache]: Analyzing trace with hash -1419708920, now seen corresponding path program 4 times [2021-08-06 15:26:38,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:38,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439527373] [2021-08-06 15:26:38,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:38,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:38,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:39,009 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:39,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:39,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439527373] [2021-08-06 15:26:39,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439527373] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:26:39,010 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:26:39,010 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 15:26:39,010 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134507540] [2021-08-06 15:26:39,010 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 15:26:39,010 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:39,010 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 15:26:39,010 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:26:39,010 INFO L87 Difference]: Start difference. First operand 209 states and 505 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:39,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:39,052 INFO L93 Difference]: Finished difference Result 348 states and 822 transitions. [2021-08-06 15:26:39,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-06 15:26:39,052 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:26:39,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:39,053 INFO L225 Difference]: With dead ends: 348 [2021-08-06 15:26:39,053 INFO L226 Difference]: Without dead ends: 330 [2021-08-06 15:26:39,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 18.5ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:26:39,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 330 states. [2021-08-06 15:26:39,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 330 to 209. [2021-08-06 15:26:39,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.4086538461538463) internal successors, (501), 208 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:39,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 501 transitions. [2021-08-06 15:26:39,058 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 501 transitions. Word has length 25 [2021-08-06 15:26:39,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:39,058 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 501 transitions. [2021-08-06 15:26:39,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:39,058 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 501 transitions. [2021-08-06 15:26:39,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:26:39,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:39,059 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:39,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2021-08-06 15:26:39,059 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:39,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:39,059 INFO L82 PathProgramCache]: Analyzing trace with hash -1882885130, now seen corresponding path program 5 times [2021-08-06 15:26:39,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:39,060 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1989524447] [2021-08-06 15:26:39,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:39,060 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:39,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:39,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:39,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1989524447] [2021-08-06 15:26:39,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1989524447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:39,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136219439] [2021-08-06 15:26:39,086 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:26:39,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:39,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:39,087 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) [2021-08-06 15:26:39,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-06 15:26:39,157 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:26:39,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:39,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-06 15:26:39,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:39,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:39,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136219439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:39,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:39,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2021-08-06 15:26:39,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137665119] [2021-08-06 15:26:39,292 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-08-06 15:26:39,292 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:39,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-08-06 15:26:39,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2021-08-06 15:26:39,292 INFO L87 Difference]: Start difference. First operand 209 states and 501 transitions. Second operand has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:39,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:39,356 INFO L93 Difference]: Finished difference Result 379 states and 891 transitions. [2021-08-06 15:26:39,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 15:26:39,356 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:26:39,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:39,358 INFO L225 Difference]: With dead ends: 379 [2021-08-06 15:26:39,358 INFO L226 Difference]: Without dead ends: 379 [2021-08-06 15:26:39,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 38.2ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:26:39,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 379 states. [2021-08-06 15:26:39,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 379 to 209. [2021-08-06 15:26:39,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.4086538461538463) internal successors, (501), 208 states have internal predecessors, (501), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:39,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 501 transitions. [2021-08-06 15:26:39,363 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 501 transitions. Word has length 25 [2021-08-06 15:26:39,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:39,364 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 501 transitions. [2021-08-06 15:26:39,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.714285714285714) internal successors, (33), 7 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:39,364 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 501 transitions. [2021-08-06 15:26:39,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:26:39,364 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:39,364 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:39,386 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:39,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-06 15:26:39,573 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:39,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:39,573 INFO L82 PathProgramCache]: Analyzing trace with hash -2093582176, now seen corresponding path program 5 times [2021-08-06 15:26:39,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:39,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191352796] [2021-08-06 15:26:39,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:39,573 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:39,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:39,599 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:39,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:39,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191352796] [2021-08-06 15:26:39,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191352796] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:26:39,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:26:39,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 15:26:39,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442366158] [2021-08-06 15:26:39,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 15:26:39,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:39,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 15:26:39,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:26:39,600 INFO L87 Difference]: Start difference. First operand 209 states and 501 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:39,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:39,647 INFO L93 Difference]: Finished difference Result 381 states and 892 transitions. [2021-08-06 15:26:39,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:26:39,647 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:26:39,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:39,649 INFO L225 Difference]: With dead ends: 381 [2021-08-06 15:26:39,649 INFO L226 Difference]: Without dead ends: 375 [2021-08-06 15:26:39,649 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 22.1ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:26:39,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 375 states. [2021-08-06 15:26:39,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 375 to 233. [2021-08-06 15:26:39,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.418103448275862) internal successors, (561), 232 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:39,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 561 transitions. [2021-08-06 15:26:39,653 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 561 transitions. Word has length 25 [2021-08-06 15:26:39,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:39,653 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 561 transitions. [2021-08-06 15:26:39,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:39,654 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 561 transitions. [2021-08-06 15:26:39,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:26:39,654 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:39,654 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:39,654 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2021-08-06 15:26:39,654 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:39,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:39,655 INFO L82 PathProgramCache]: Analyzing trace with hash -1364830358, now seen corresponding path program 6 times [2021-08-06 15:26:39,655 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:39,655 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694033391] [2021-08-06 15:26:39,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:39,655 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:39,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:39,681 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:39,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:39,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694033391] [2021-08-06 15:26:39,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694033391] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:26:39,681 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:26:39,681 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 15:26:39,681 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795373658] [2021-08-06 15:26:39,683 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 15:26:39,683 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:39,683 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 15:26:39,683 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:26:39,683 INFO L87 Difference]: Start difference. First operand 233 states and 561 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:39,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:39,743 INFO L93 Difference]: Finished difference Result 311 states and 744 transitions. [2021-08-06 15:26:39,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 15:26:39,744 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:26:39,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:39,745 INFO L225 Difference]: With dead ends: 311 [2021-08-06 15:26:39,745 INFO L226 Difference]: Without dead ends: 311 [2021-08-06 15:26:39,745 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 27.5ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:26:39,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 311 states. [2021-08-06 15:26:39,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 311 to 209. [2021-08-06 15:26:39,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 2.3990384615384617) internal successors, (499), 208 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:39,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 499 transitions. [2021-08-06 15:26:39,749 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 499 transitions. Word has length 25 [2021-08-06 15:26:39,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:39,750 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 499 transitions. [2021-08-06 15:26:39,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:39,750 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 499 transitions. [2021-08-06 15:26:39,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-06 15:26:39,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:39,750 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:39,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-08-06 15:26:39,750 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:39,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:39,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1741801512, now seen corresponding path program 6 times [2021-08-06 15:26:39,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:39,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692676891] [2021-08-06 15:26:39,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:39,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:39,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:39,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:39,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:39,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692676891] [2021-08-06 15:26:39,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692676891] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 15:26:39,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 15:26:39,777 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-06 15:26:39,777 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2056861630] [2021-08-06 15:26:39,777 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 15:26:39,777 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:39,778 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 15:26:39,778 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-06 15:26:39,778 INFO L87 Difference]: Start difference. First operand 209 states and 499 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:39,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:39,819 INFO L93 Difference]: Finished difference Result 256 states and 607 transitions. [2021-08-06 15:26:39,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-06 15:26:39,819 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have 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 [2021-08-06 15:26:39,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:39,820 INFO L225 Difference]: With dead ends: 256 [2021-08-06 15:26:39,820 INFO L226 Difference]: Without dead ends: 249 [2021-08-06 15:26:39,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 20.7ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 15:26:39,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-08-06 15:26:39,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 207. [2021-08-06 15:26:39,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 2.3883495145631066) internal successors, (492), 206 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:39,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 492 transitions. [2021-08-06 15:26:39,824 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 492 transitions. Word has length 25 [2021-08-06 15:26:39,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:39,825 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 492 transitions. [2021-08-06 15:26:39,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:39,825 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 492 transitions. [2021-08-06 15:26:39,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:26:39,825 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:39,825 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:39,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2021-08-06 15:26:39,825 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:39,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:39,826 INFO L82 PathProgramCache]: Analyzing trace with hash -1303572942, now seen corresponding path program 1 times [2021-08-06 15:26:39,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:39,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827219678] [2021-08-06 15:26:39,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:39,826 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:39,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:39,954 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:39,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:39,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827219678] [2021-08-06 15:26:39,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827219678] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:39,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [755287714] [2021-08-06 15:26:39,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:39,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:39,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:39,956 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) [2021-08-06 15:26:39,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-06 15:26:40,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:40,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:26:40,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:40,351 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:40,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [755287714] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:40,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:40,352 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 15:26:40,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891387232] [2021-08-06 15:26:40,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:26:40,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:40,354 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:26:40,354 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:26:40,354 INFO L87 Difference]: Start difference. First operand 207 states and 492 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:40,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:40,425 INFO L93 Difference]: Finished difference Result 387 states and 917 transitions. [2021-08-06 15:26:40,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:26:40,425 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 15:26:40,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:40,426 INFO L225 Difference]: With dead ends: 387 [2021-08-06 15:26:40,426 INFO L226 Difference]: Without dead ends: 349 [2021-08-06 15:26:40,426 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 84.4ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:26:40,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-08-06 15:26:40,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 246. [2021-08-06 15:26:40,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 2.3510204081632655) internal successors, (576), 245 states have internal predecessors, (576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:40,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 576 transitions. [2021-08-06 15:26:40,431 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 576 transitions. Word has length 28 [2021-08-06 15:26:40,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:40,432 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 576 transitions. [2021-08-06 15:26:40,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:40,432 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 576 transitions. [2021-08-06 15:26:40,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:26:40,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:40,432 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:40,452 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:40,652 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:40,652 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:40,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:40,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1615951622, now seen corresponding path program 2 times [2021-08-06 15:26:40,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:40,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [421314947] [2021-08-06 15:26:40,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:40,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:40,753 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:40,753 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:40,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [421314947] [2021-08-06 15:26:40,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [421314947] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:40,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241350405] [2021-08-06 15:26:40,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:26:40,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:40,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:40,754 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) [2021-08-06 15:26:40,755 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-06 15:26:40,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:26:40,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:40,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:26:40,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:41,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [241350405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:41,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:41,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 15:26:41,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896933463] [2021-08-06 15:26:41,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:26:41,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:41,151 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:26:41,151 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:26:41,151 INFO L87 Difference]: Start difference. First operand 246 states and 576 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:41,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:41,255 INFO L93 Difference]: Finished difference Result 496 states and 1252 transitions. [2021-08-06 15:26:41,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:26:41,256 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 15:26:41,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:41,257 INFO L225 Difference]: With dead ends: 496 [2021-08-06 15:26:41,257 INFO L226 Difference]: Without dead ends: 459 [2021-08-06 15:26:41,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 91.3ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:26:41,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 459 states. [2021-08-06 15:26:41,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 459 to 337. [2021-08-06 15:26:41,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 337 states, 336 states have (on average 2.4791666666666665) internal successors, (833), 336 states have internal predecessors, (833), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:41,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 337 states to 337 states and 833 transitions. [2021-08-06 15:26:41,263 INFO L78 Accepts]: Start accepts. Automaton has 337 states and 833 transitions. Word has length 28 [2021-08-06 15:26:41,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:41,263 INFO L470 AbstractCegarLoop]: Abstraction has 337 states and 833 transitions. [2021-08-06 15:26:41,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:41,264 INFO L276 IsEmpty]: Start isEmpty. Operand 337 states and 833 transitions. [2021-08-06 15:26:41,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:26:41,264 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:41,264 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:41,283 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:41,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:41,480 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:41,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:41,480 INFO L82 PathProgramCache]: Analyzing trace with hash -1019845706, now seen corresponding path program 3 times [2021-08-06 15:26:41,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:41,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [193332071] [2021-08-06 15:26:41,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:41,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:41,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:41,584 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:41,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:41,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [193332071] [2021-08-06 15:26:41,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [193332071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:41,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391585362] [2021-08-06 15:26:41,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:26:41,584 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:41,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:41,585 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) [2021-08-06 15:26:41,586 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-06 15:26:41,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:26:41,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:41,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:26:41,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:42,048 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:42,048 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391585362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:42,048 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:42,048 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 15:26:42,048 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295496769] [2021-08-06 15:26:42,049 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:26:42,049 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:42,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:26:42,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:26:42,051 INFO L87 Difference]: Start difference. First operand 337 states and 833 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:42,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:42,155 INFO L93 Difference]: Finished difference Result 504 states and 1265 transitions. [2021-08-06 15:26:42,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:26:42,155 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 15:26:42,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:42,157 INFO L225 Difference]: With dead ends: 504 [2021-08-06 15:26:42,157 INFO L226 Difference]: Without dead ends: 462 [2021-08-06 15:26:42,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 92.9ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:26:42,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 462 states. [2021-08-06 15:26:42,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 462 to 331. [2021-08-06 15:26:42,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 2.4727272727272727) internal successors, (816), 330 states have internal predecessors, (816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:42,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 816 transitions. [2021-08-06 15:26:42,163 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 816 transitions. Word has length 28 [2021-08-06 15:26:42,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:42,163 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 816 transitions. [2021-08-06 15:26:42,163 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:42,163 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 816 transitions. [2021-08-06 15:26:42,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:26:42,163 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:42,164 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:42,182 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:42,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:42,377 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:42,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:42,377 INFO L82 PathProgramCache]: Analyzing trace with hash -2077369234, now seen corresponding path program 4 times [2021-08-06 15:26:42,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:42,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454223664] [2021-08-06 15:26:42,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:42,377 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:42,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:42,485 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:42,486 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:42,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454223664] [2021-08-06 15:26:42,486 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454223664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:42,486 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610996004] [2021-08-06 15:26:42,486 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:26:42,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:42,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:42,487 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) [2021-08-06 15:26:42,488 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-06 15:26:42,628 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:26:42,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:42,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:26:42,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:42,969 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:42,970 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1610996004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:42,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:42,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-08-06 15:26:42,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986874649] [2021-08-06 15:26:42,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:26:42,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:42,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:26:42,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:26:42,972 INFO L87 Difference]: Start difference. First operand 331 states and 816 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) [2021-08-06 15:26:43,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:43,055 INFO L93 Difference]: Finished difference Result 519 states and 1295 transitions. [2021-08-06 15:26:43,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 15:26:43,055 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 28 [2021-08-06 15:26:43,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:43,057 INFO L225 Difference]: With dead ends: 519 [2021-08-06 15:26:43,057 INFO L226 Difference]: Without dead ends: 481 [2021-08-06 15:26:43,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 93.1ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:26:43,059 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-08-06 15:26:43,062 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 349. [2021-08-06 15:26:43,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 349 states, 348 states have (on average 2.4913793103448274) internal successors, (867), 348 states have internal predecessors, (867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:43,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 349 states to 349 states and 867 transitions. [2021-08-06 15:26:43,064 INFO L78 Accepts]: Start accepts. Automaton has 349 states and 867 transitions. Word has length 28 [2021-08-06 15:26:43,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:43,065 INFO L470 AbstractCegarLoop]: Abstraction has 349 states and 867 transitions. [2021-08-06 15:26:43,065 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) [2021-08-06 15:26:43,065 INFO L276 IsEmpty]: Start isEmpty. Operand 349 states and 867 transitions. [2021-08-06 15:26:43,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:26:43,066 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:43,066 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:43,085 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:43,276 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,SelfDestructingSolverStorable21 [2021-08-06 15:26:43,277 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:43,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:43,277 INFO L82 PathProgramCache]: Analyzing trace with hash -2005105870, now seen corresponding path program 5 times [2021-08-06 15:26:43,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:43,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305804834] [2021-08-06 15:26:43,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:43,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:43,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:43,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:43,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:43,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305804834] [2021-08-06 15:26:43,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305804834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:43,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484413766] [2021-08-06 15:26:43,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:26:43,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:43,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:43,392 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) [2021-08-06 15:26:43,416 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-06 15:26:43,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:26:43,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:43,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:26:43,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:43,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484413766] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:43,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:43,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 15:26:43,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806541751] [2021-08-06 15:26:43,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:26:43,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:43,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:26:43,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:26:43,953 INFO L87 Difference]: Start difference. First operand 349 states and 867 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:44,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:44,080 INFO L93 Difference]: Finished difference Result 530 states and 1325 transitions. [2021-08-06 15:26:44,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:26:44,080 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 15:26:44,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:44,082 INFO L225 Difference]: With dead ends: 530 [2021-08-06 15:26:44,082 INFO L226 Difference]: Without dead ends: 493 [2021-08-06 15:26:44,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 110.2ms TimeCoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:26:44,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 493 states. [2021-08-06 15:26:44,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 493 to 439. [2021-08-06 15:26:44,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.5525114155251143) internal successors, (1118), 438 states have internal predecessors, (1118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:44,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 1118 transitions. [2021-08-06 15:26:44,089 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 1118 transitions. Word has length 28 [2021-08-06 15:26:44,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:44,089 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 1118 transitions. [2021-08-06 15:26:44,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:44,089 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 1118 transitions. [2021-08-06 15:26:44,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:26:44,090 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:44,090 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:44,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:44,309 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:44,309 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:44,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:44,309 INFO L82 PathProgramCache]: Analyzing trace with hash -728601806, now seen corresponding path program 6 times [2021-08-06 15:26:44,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:44,309 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224486327] [2021-08-06 15:26:44,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:44,309 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:44,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:44,422 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:44,422 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:44,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224486327] [2021-08-06 15:26:44,422 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224486327] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:44,422 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [595355018] [2021-08-06 15:26:44,422 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:26:44,422 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:44,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:44,423 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) [2021-08-06 15:26:44,444 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-06 15:26:44,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:26:44,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:44,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:26:44,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:44,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:44,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [595355018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:44,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:44,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-08-06 15:26:44,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [675873281] [2021-08-06 15:26:44,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:26:44,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:44,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:26:44,959 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:26:44,960 INFO L87 Difference]: Start difference. First operand 439 states and 1118 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) [2021-08-06 15:26:45,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:45,031 INFO L93 Difference]: Finished difference Result 526 states and 1316 transitions. [2021-08-06 15:26:45,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:26:45,032 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 28 [2021-08-06 15:26:45,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:45,034 INFO L225 Difference]: With dead ends: 526 [2021-08-06 15:26:45,034 INFO L226 Difference]: Without dead ends: 486 [2021-08-06 15:26:45,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 77.5ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:26:45,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 486 states. [2021-08-06 15:26:45,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 486 to 429. [2021-08-06 15:26:45,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 429 states, 428 states have (on average 2.5490654205607477) internal successors, (1091), 428 states have internal predecessors, (1091), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:45,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 429 states to 429 states and 1091 transitions. [2021-08-06 15:26:45,040 INFO L78 Accepts]: Start accepts. Automaton has 429 states and 1091 transitions. Word has length 28 [2021-08-06 15:26:45,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:45,040 INFO L470 AbstractCegarLoop]: Abstraction has 429 states and 1091 transitions. [2021-08-06 15:26:45,040 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) [2021-08-06 15:26:45,040 INFO L276 IsEmpty]: Start isEmpty. Operand 429 states and 1091 transitions. [2021-08-06 15:26:45,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:26:45,041 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:45,041 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:45,060 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:45,257 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,SelfDestructingSolverStorable23 [2021-08-06 15:26:45,258 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:45,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:45,258 INFO L82 PathProgramCache]: Analyzing trace with hash 822003450, now seen corresponding path program 7 times [2021-08-06 15:26:45,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:45,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458833393] [2021-08-06 15:26:45,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:45,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:45,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:45,386 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:45,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458833393] [2021-08-06 15:26:45,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458833393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:45,386 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899520320] [2021-08-06 15:26:45,387 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:26:45,387 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:45,387 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:45,387 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) [2021-08-06 15:26:45,388 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-06 15:26:45,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:45,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:26:45,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:45,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:45,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [899520320] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:45,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:45,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 15:26:45,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1923311525] [2021-08-06 15:26:45,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:26:45,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:45,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:26:45,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:26:45,967 INFO L87 Difference]: Start difference. First operand 429 states and 1091 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-08-06 15:26:46,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:46,053 INFO L93 Difference]: Finished difference Result 623 states and 1567 transitions. [2021-08-06 15:26:46,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:26:46,053 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 28 [2021-08-06 15:26:46,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:46,055 INFO L225 Difference]: With dead ends: 623 [2021-08-06 15:26:46,055 INFO L226 Difference]: Without dead ends: 585 [2021-08-06 15:26:46,055 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:26:46,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 585 states. [2021-08-06 15:26:46,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 585 to 479. [2021-08-06 15:26:46,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.598326359832636) internal successors, (1242), 478 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:46,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1242 transitions. [2021-08-06 15:26:46,062 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1242 transitions. Word has length 28 [2021-08-06 15:26:46,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:46,062 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1242 transitions. [2021-08-06 15:26:46,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-08-06 15:26:46,062 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1242 transitions. [2021-08-06 15:26:46,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:26:46,063 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:46,063 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:46,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:46,280 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,SelfDestructingSolverStorable24 [2021-08-06 15:26:46,280 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:46,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:46,281 INFO L82 PathProgramCache]: Analyzing trace with hash -1321744902, now seen corresponding path program 8 times [2021-08-06 15:26:46,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:46,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455362316] [2021-08-06 15:26:46,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:46,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:46,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:46,397 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:46,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:46,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455362316] [2021-08-06 15:26:46,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455362316] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:46,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673380991] [2021-08-06 15:26:46,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:26:46,398 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:46,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:46,398 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) [2021-08-06 15:26:46,399 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-06 15:26:46,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:26:46,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:46,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:26:46,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:46,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:46,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673380991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:46,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:46,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 15:26:46,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1660573800] [2021-08-06 15:26:46,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:26:46,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:46,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:26:46,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:26:46,946 INFO L87 Difference]: Start difference. First operand 479 states and 1242 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:47,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:47,030 INFO L93 Difference]: Finished difference Result 774 states and 2027 transitions. [2021-08-06 15:26:47,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:26:47,031 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 15:26:47,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:47,033 INFO L225 Difference]: With dead ends: 774 [2021-08-06 15:26:47,033 INFO L226 Difference]: Without dead ends: 737 [2021-08-06 15:26:47,033 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 84.6ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:26:47,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 737 states. [2021-08-06 15:26:47,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 737 to 491. [2021-08-06 15:26:47,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 2.595918367346939) internal successors, (1272), 490 states have internal predecessors, (1272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:47,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1272 transitions. [2021-08-06 15:26:47,041 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1272 transitions. Word has length 28 [2021-08-06 15:26:47,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:47,041 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 1272 transitions. [2021-08-06 15:26:47,041 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:47,041 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1272 transitions. [2021-08-06 15:26:47,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:26:47,042 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:47,042 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:47,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:47,256 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,SelfDestructingSolverStorable25 [2021-08-06 15:26:47,257 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:47,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:47,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1275563638, now seen corresponding path program 9 times [2021-08-06 15:26:47,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:47,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50968964] [2021-08-06 15:26:47,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:47,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:47,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:47,372 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:47,372 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:47,372 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50968964] [2021-08-06 15:26:47,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50968964] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:47,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92900731] [2021-08-06 15:26:47,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:26:47,373 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:47,373 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:47,373 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) [2021-08-06 15:26:47,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-06 15:26:47,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:26:47,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:47,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:26:47,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:47,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:47,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92900731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:47,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:47,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 11 [2021-08-06 15:26:47,940 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143815416] [2021-08-06 15:26:47,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:26:47,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:47,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:26:47,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:26:47,942 INFO L87 Difference]: Start difference. First operand 491 states and 1272 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) [2021-08-06 15:26:48,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:48,023 INFO L93 Difference]: Finished difference Result 766 states and 2025 transitions. [2021-08-06 15:26:48,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 15:26:48,023 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 28 [2021-08-06 15:26:48,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:48,025 INFO L225 Difference]: With dead ends: 766 [2021-08-06 15:26:48,025 INFO L226 Difference]: Without dead ends: 729 [2021-08-06 15:26:48,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 88.5ms TimeCoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:26:48,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 729 states. [2021-08-06 15:26:48,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 729 to 509. [2021-08-06 15:26:48,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 2.604330708661417) internal successors, (1323), 508 states have internal predecessors, (1323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:48,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 1323 transitions. [2021-08-06 15:26:48,033 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 1323 transitions. Word has length 28 [2021-08-06 15:26:48,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:48,033 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 1323 transitions. [2021-08-06 15:26:48,033 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) [2021-08-06 15:26:48,033 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 1323 transitions. [2021-08-06 15:26:48,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:26:48,034 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:48,034 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:48,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:48,235 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,SelfDestructingSolverStorable26 [2021-08-06 15:26:48,235 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:48,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:48,235 INFO L82 PathProgramCache]: Analyzing trace with hash 291770938, now seen corresponding path program 10 times [2021-08-06 15:26:48,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:48,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938851788] [2021-08-06 15:26:48,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:48,235 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:48,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:48,340 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:48,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:48,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938851788] [2021-08-06 15:26:48,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938851788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:48,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805110330] [2021-08-06 15:26:48,341 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:26:48,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:48,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:48,345 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) [2021-08-06 15:26:48,359 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-06 15:26:48,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:26:48,647 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:48,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:26:48,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:48,925 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:48,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805110330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:48,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:48,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 15:26:48,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1428031842] [2021-08-06 15:26:48,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:26:48,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:48,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:26:48,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:26:48,926 INFO L87 Difference]: Start difference. First operand 509 states and 1323 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:49,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:49,037 INFO L93 Difference]: Finished difference Result 860 states and 2316 transitions. [2021-08-06 15:26:49,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:26:49,037 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 15:26:49,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:49,040 INFO L225 Difference]: With dead ends: 860 [2021-08-06 15:26:49,040 INFO L226 Difference]: Without dead ends: 823 [2021-08-06 15:26:49,040 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 101.3ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:26:49,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 823 states. [2021-08-06 15:26:49,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 823 to 587. [2021-08-06 15:26:49,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 2.645051194539249) internal successors, (1550), 586 states have internal predecessors, (1550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:49,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1550 transitions. [2021-08-06 15:26:49,049 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1550 transitions. Word has length 28 [2021-08-06 15:26:49,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:49,049 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 1550 transitions. [2021-08-06 15:26:49,049 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:49,049 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1550 transitions. [2021-08-06 15:26:49,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:26:49,050 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:49,050 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:49,069 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:49,269 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:49,269 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:49,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:49,270 INFO L82 PathProgramCache]: Analyzing trace with hash 172687926, now seen corresponding path program 11 times [2021-08-06 15:26:49,270 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:49,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334144687] [2021-08-06 15:26:49,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:49,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:49,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:49,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:49,373 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:49,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334144687] [2021-08-06 15:26:49,373 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334144687] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:49,373 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43640495] [2021-08-06 15:26:49,374 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:26:49,374 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:49,374 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:49,379 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) [2021-08-06 15:26:49,380 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-06 15:26:49,692 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:26:49,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:49,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:26:49,693 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:49,956 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:49,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43640495] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:49,957 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:49,957 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-06 15:26:49,957 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21419057] [2021-08-06 15:26:49,957 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:26:49,957 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:49,957 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:26:49,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:26:49,957 INFO L87 Difference]: Start difference. First operand 587 states and 1550 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:50,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:50,083 INFO L93 Difference]: Finished difference Result 864 states and 2321 transitions. [2021-08-06 15:26:50,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:26:50,084 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 15:26:50,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:50,086 INFO L225 Difference]: With dead ends: 864 [2021-08-06 15:26:50,087 INFO L226 Difference]: Without dead ends: 822 [2021-08-06 15:26:50,087 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 97.1ms TimeCoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:26:50,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-08-06 15:26:50,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 571. [2021-08-06 15:26:50,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 571 states, 570 states have (on average 2.645614035087719) internal successors, (1508), 570 states have internal predecessors, (1508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:50,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 571 states to 571 states and 1508 transitions. [2021-08-06 15:26:50,095 INFO L78 Accepts]: Start accepts. Automaton has 571 states and 1508 transitions. Word has length 28 [2021-08-06 15:26:50,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:50,095 INFO L470 AbstractCegarLoop]: Abstraction has 571 states and 1508 transitions. [2021-08-06 15:26:50,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:50,095 INFO L276 IsEmpty]: Start isEmpty. Operand 571 states and 1508 transitions. [2021-08-06 15:26:50,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:26:50,096 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:50,096 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:50,115 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-06 15:26:50,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-06 15:26:50,313 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:50,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:50,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1059308476, now seen corresponding path program 12 times [2021-08-06 15:26:50,313 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:50,313 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126430025] [2021-08-06 15:26:50,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:50,313 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:50,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:50,413 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:50,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:50,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126430025] [2021-08-06 15:26:50,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126430025] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:50,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276972555] [2021-08-06 15:26:50,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:26:50,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:50,414 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:50,414 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) [2021-08-06 15:26:50,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-06 15:26:50,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 15:26:50,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:50,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:26:50,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:51,042 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:51,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276972555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:51,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:51,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 15:26:51,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981357556] [2021-08-06 15:26:51,042 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:26:51,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:51,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:26:51,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:26:51,043 INFO L87 Difference]: Start difference. First operand 571 states and 1508 transitions. Second operand has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-08-06 15:26:51,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:51,163 INFO L93 Difference]: Finished difference Result 752 states and 1956 transitions. [2021-08-06 15:26:51,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:26:51,163 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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 28 [2021-08-06 15:26:51,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:51,165 INFO L225 Difference]: With dead ends: 752 [2021-08-06 15:26:51,165 INFO L226 Difference]: Without dead ends: 715 [2021-08-06 15:26:51,166 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 22 SyntacticMatches, 3 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 97.8ms TimeCoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:26:51,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-08-06 15:26:51,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 559. [2021-08-06 15:26:51,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 559 states, 558 states have (on average 2.6415770609319) internal successors, (1474), 558 states have internal predecessors, (1474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:51,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 559 states to 559 states and 1474 transitions. [2021-08-06 15:26:51,173 INFO L78 Accepts]: Start accepts. Automaton has 559 states and 1474 transitions. Word has length 28 [2021-08-06 15:26:51,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:51,173 INFO L470 AbstractCegarLoop]: Abstraction has 559 states and 1474 transitions. [2021-08-06 15:26:51,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.8461538461538463) internal successors, (37), 12 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) [2021-08-06 15:26:51,173 INFO L276 IsEmpty]: Start isEmpty. Operand 559 states and 1474 transitions. [2021-08-06 15:26:51,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:26:51,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:51,174 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:51,205 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:51,388 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:51,389 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:51,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:51,389 INFO L82 PathProgramCache]: Analyzing trace with hash 225287764, now seen corresponding path program 13 times [2021-08-06 15:26:51,389 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:51,389 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691620901] [2021-08-06 15:26:51,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:51,389 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:51,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:51,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:51,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691620901] [2021-08-06 15:26:51,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691620901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:51,492 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142736654] [2021-08-06 15:26:51,492 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:26:51,492 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:51,492 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:51,492 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) [2021-08-06 15:26:51,493 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-06 15:26:51,839 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:51,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:26:51,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:52,124 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:52,124 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142736654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:52,124 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:52,124 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-08-06 15:26:52,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082473044] [2021-08-06 15:26:52,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:26:52,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:52,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:26:52,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:26:52,125 INFO L87 Difference]: Start difference. First operand 559 states and 1474 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:52,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:52,191 INFO L93 Difference]: Finished difference Result 718 states and 1889 transitions. [2021-08-06 15:26:52,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:26:52,192 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 15:26:52,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:52,194 INFO L225 Difference]: With dead ends: 718 [2021-08-06 15:26:52,194 INFO L226 Difference]: Without dead ends: 681 [2021-08-06 15:26:52,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 82.4ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:26:52,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 681 states. [2021-08-06 15:26:52,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 681 to 629. [2021-08-06 15:26:52,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 629 states, 628 states have (on average 2.676751592356688) internal successors, (1681), 628 states have internal predecessors, (1681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:52,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 629 states to 629 states and 1681 transitions. [2021-08-06 15:26:52,202 INFO L78 Accepts]: Start accepts. Automaton has 629 states and 1681 transitions. Word has length 28 [2021-08-06 15:26:52,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:52,202 INFO L470 AbstractCegarLoop]: Abstraction has 629 states and 1681 transitions. [2021-08-06 15:26:52,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:52,202 INFO L276 IsEmpty]: Start isEmpty. Operand 629 states and 1681 transitions. [2021-08-06 15:26:52,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:26:52,203 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:52,203 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:52,221 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:52,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:52,417 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:52,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:52,417 INFO L82 PathProgramCache]: Analyzing trace with hash 106204752, now seen corresponding path program 14 times [2021-08-06 15:26:52,417 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:52,417 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272168560] [2021-08-06 15:26:52,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:52,417 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:52,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:52,528 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:26:52,528 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:52,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272168560] [2021-08-06 15:26:52,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272168560] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:52,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606362990] [2021-08-06 15:26:52,528 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:26:52,528 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:52,528 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:52,529 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) [2021-08-06 15:26:52,529 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-06 15:26:52,890 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:26:52,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:52,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-06 15:26:52,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:53,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:53,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [606362990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:53,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:53,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 10 [2021-08-06 15:26:53,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430899749] [2021-08-06 15:26:53,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:26:53,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:53,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:26:53,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:26:53,188 INFO L87 Difference]: Start difference. First operand 629 states and 1681 transitions. Second operand has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:53,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:53,268 INFO L93 Difference]: Finished difference Result 722 states and 1896 transitions. [2021-08-06 15:26:53,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:26:53,268 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 15:26:53,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:53,270 INFO L225 Difference]: With dead ends: 722 [2021-08-06 15:26:53,270 INFO L226 Difference]: Without dead ends: 682 [2021-08-06 15:26:53,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 85.9ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:26:53,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-08-06 15:26:53,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 573. [2021-08-06 15:26:53,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 573 states, 572 states have (on average 2.645104895104895) internal successors, (1513), 572 states have internal predecessors, (1513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:53,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 573 states to 573 states and 1513 transitions. [2021-08-06 15:26:53,278 INFO L78 Accepts]: Start accepts. Automaton has 573 states and 1513 transitions. Word has length 28 [2021-08-06 15:26:53,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:53,278 INFO L470 AbstractCegarLoop]: Abstraction has 573 states and 1513 transitions. [2021-08-06 15:26:53,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.0) internal successors, (33), 10 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:53,278 INFO L276 IsEmpty]: Start isEmpty. Operand 573 states and 1513 transitions. [2021-08-06 15:26:53,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 15:26:53,279 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:53,279 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:53,298 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:53,490 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:53,490 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:53,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:53,490 INFO L82 PathProgramCache]: Analyzing trace with hash 250492334, now seen corresponding path program 15 times [2021-08-06 15:26:53,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:53,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500064966] [2021-08-06 15:26:53,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:53,491 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:53,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:53,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:53,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:53,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500064966] [2021-08-06 15:26:53,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500064966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:53,600 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609331748] [2021-08-06 15:26:53,600 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:26:53,600 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:53,600 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:53,601 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) [2021-08-06 15:26:53,604 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-06 15:26:53,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:26:53,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:53,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-06 15:26:53,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:54,312 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:54,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609331748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:54,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:54,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 14 [2021-08-06 15:26:54,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780235055] [2021-08-06 15:26:54,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:26:54,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:54,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:26:54,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=171, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:26:54,314 INFO L87 Difference]: Start difference. First operand 573 states and 1513 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) [2021-08-06 15:26:54,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:54,482 INFO L93 Difference]: Finished difference Result 800 states and 2048 transitions. [2021-08-06 15:26:54,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:26:54,482 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 28 [2021-08-06 15:26:54,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:54,485 INFO L225 Difference]: With dead ends: 800 [2021-08-06 15:26:54,485 INFO L226 Difference]: Without dead ends: 762 [2021-08-06 15:26:54,486 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 145.8ms TimeCoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:26:54,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 762 states. [2021-08-06 15:26:54,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 762 to 543. [2021-08-06 15:26:54,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 542 states have (on average 2.6457564575645756) internal successors, (1434), 542 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:54,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 1434 transitions. [2021-08-06 15:26:54,493 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 1434 transitions. Word has length 28 [2021-08-06 15:26:54,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:54,493 INFO L470 AbstractCegarLoop]: Abstraction has 543 states and 1434 transitions. [2021-08-06 15:26:54,493 INFO L471 AbstractCegarLoop]: INTERPOLANT 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) [2021-08-06 15:26:54,493 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 1434 transitions. [2021-08-06 15:26:54,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:26:54,494 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:54,494 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:54,512 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:54,711 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:54,712 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:54,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:54,712 INFO L82 PathProgramCache]: Analyzing trace with hash -284392048, now seen corresponding path program 16 times [2021-08-06 15:26:54,712 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:54,712 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753236216] [2021-08-06 15:26:54,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:54,712 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:54,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:54,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:54,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:54,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753236216] [2021-08-06 15:26:54,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753236216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:54,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438560566] [2021-08-06 15:26:54,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:26:54,747 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:54,747 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:54,748 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) [2021-08-06 15:26:54,753 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-06 15:26:55,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:26:55,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:55,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:26:55,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:55,313 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:55,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438560566] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:55,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:55,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 15:26:55,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824671397] [2021-08-06 15:26:55,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:26:55,314 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:55,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:26:55,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:26:55,314 INFO L87 Difference]: Start difference. First operand 543 states and 1434 transitions. Second operand has 9 states, 9 states have (on average 4.0) 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) [2021-08-06 15:26:55,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:55,419 INFO L93 Difference]: Finished difference Result 992 states and 2597 transitions. [2021-08-06 15:26:55,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:26:55,419 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) 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 31 [2021-08-06 15:26:55,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:55,422 INFO L225 Difference]: With dead ends: 992 [2021-08-06 15:26:55,422 INFO L226 Difference]: Without dead ends: 992 [2021-08-06 15:26:55,422 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:26:55,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 992 states. [2021-08-06 15:26:55,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 992 to 587. [2021-08-06 15:26:55,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 2.66382252559727) internal successors, (1561), 586 states have internal predecessors, (1561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:55,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1561 transitions. [2021-08-06 15:26:55,431 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1561 transitions. Word has length 31 [2021-08-06 15:26:55,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:55,431 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 1561 transitions. [2021-08-06 15:26:55,431 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) 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) [2021-08-06 15:26:55,431 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1561 transitions. [2021-08-06 15:26:55,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:26:55,432 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:55,432 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:55,453 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:55,648 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,SelfDestructingSolverStorable33 [2021-08-06 15:26:55,649 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:55,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:55,649 INFO L82 PathProgramCache]: Analyzing trace with hash -990198030, now seen corresponding path program 17 times [2021-08-06 15:26:55,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:55,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453478556] [2021-08-06 15:26:55,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:55,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:55,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:55,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:55,681 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:55,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453478556] [2021-08-06 15:26:55,681 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453478556] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:55,681 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345135681] [2021-08-06 15:26:55,681 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:26:55,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:55,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:55,682 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) [2021-08-06 15:26:55,683 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-06 15:26:56,096 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:26:56,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:56,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:26:56,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:56,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:56,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1345135681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:56,271 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:56,271 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 15:26:56,271 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674798124] [2021-08-06 15:26:56,271 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:26:56,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:56,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:26:56,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:26:56,272 INFO L87 Difference]: Start difference. First operand 587 states and 1561 transitions. Second operand has 9 states, 9 states have (on average 4.0) 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) [2021-08-06 15:26:56,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:56,344 INFO L93 Difference]: Finished difference Result 1042 states and 2731 transitions. [2021-08-06 15:26:56,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:26:56,344 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) 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 31 [2021-08-06 15:26:56,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:56,347 INFO L225 Difference]: With dead ends: 1042 [2021-08-06 15:26:56,347 INFO L226 Difference]: Without dead ends: 997 [2021-08-06 15:26:56,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 57.1ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:26:56,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 997 states. [2021-08-06 15:26:56,354 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 997 to 587. [2021-08-06 15:26:56,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 587 states, 586 states have (on average 2.651877133105802) internal successors, (1554), 586 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:56,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 587 states to 587 states and 1554 transitions. [2021-08-06 15:26:56,356 INFO L78 Accepts]: Start accepts. Automaton has 587 states and 1554 transitions. Word has length 31 [2021-08-06 15:26:56,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:56,356 INFO L470 AbstractCegarLoop]: Abstraction has 587 states and 1554 transitions. [2021-08-06 15:26:56,356 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) 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) [2021-08-06 15:26:56,356 INFO L276 IsEmpty]: Start isEmpty. Operand 587 states and 1554 transitions. [2021-08-06 15:26:56,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:26:56,357 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:56,357 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:56,376 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:56,560 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,SelfDestructingSolverStorable34 [2021-08-06 15:26:56,561 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:56,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:56,561 INFO L82 PathProgramCache]: Analyzing trace with hash 927800430, now seen corresponding path program 18 times [2021-08-06 15:26:56,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:56,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340542039] [2021-08-06 15:26:56,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:56,561 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:56,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:56,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:56,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:56,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340542039] [2021-08-06 15:26:56,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340542039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:56,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1988620304] [2021-08-06 15:26:56,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:26:56,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:56,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:56,600 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) [2021-08-06 15:26:56,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-06 15:26:57,062 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:26:57,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:57,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:26:57,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:57,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:57,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1988620304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:57,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:57,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 15:26:57,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908266554] [2021-08-06 15:26:57,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:26:57,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:57,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:26:57,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:26:57,251 INFO L87 Difference]: Start difference. First operand 587 states and 1554 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-08-06 15:26:57,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:57,473 INFO L93 Difference]: Finished difference Result 2039 states and 5214 transitions. [2021-08-06 15:26:57,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:26:57,473 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 31 [2021-08-06 15:26:57,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:57,478 INFO L225 Difference]: With dead ends: 2039 [2021-08-06 15:26:57,478 INFO L226 Difference]: Without dead ends: 2039 [2021-08-06 15:26:57,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 141.5ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:26:57,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2039 states. [2021-08-06 15:26:57,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2039 to 884. [2021-08-06 15:26:57,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 884 states, 883 states have (on average 2.7633069082672708) internal successors, (2440), 883 states have internal predecessors, (2440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:57,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 884 states to 884 states and 2440 transitions. [2021-08-06 15:26:57,497 INFO L78 Accepts]: Start accepts. Automaton has 884 states and 2440 transitions. Word has length 31 [2021-08-06 15:26:57,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:57,497 INFO L470 AbstractCegarLoop]: Abstraction has 884 states and 2440 transitions. [2021-08-06 15:26:57,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-08-06 15:26:57,497 INFO L276 IsEmpty]: Start isEmpty. Operand 884 states and 2440 transitions. [2021-08-06 15:26:57,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:26:57,498 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:57,498 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:57,518 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:57,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:57,705 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:57,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:57,705 INFO L82 PathProgramCache]: Analyzing trace with hash 717103384, now seen corresponding path program 19 times [2021-08-06 15:26:57,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:57,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119039558] [2021-08-06 15:26:57,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:57,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:57,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:57,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:57,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:57,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119039558] [2021-08-06 15:26:57,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119039558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:57,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901588214] [2021-08-06 15:26:57,735 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:26:57,735 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:57,735 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:57,735 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) [2021-08-06 15:26:57,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-06 15:26:58,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:58,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:26:58,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:58,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:58,370 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901588214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:58,370 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:58,371 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 15:26:58,371 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [619630416] [2021-08-06 15:26:58,371 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:26:58,371 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:58,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:26:58,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:26:58,371 INFO L87 Difference]: Start difference. First operand 884 states and 2440 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:58,534 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:58,534 INFO L93 Difference]: Finished difference Result 1980 states and 5236 transitions. [2021-08-06 15:26:58,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:26:58,534 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 15:26:58,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:58,546 INFO L225 Difference]: With dead ends: 1980 [2021-08-06 15:26:58,546 INFO L226 Difference]: Without dead ends: 1968 [2021-08-06 15:26:58,547 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 111.7ms TimeCoverageRelationStatistics Valid=168, Invalid=294, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:26:58,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1968 states. [2021-08-06 15:26:58,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1968 to 1100. [2021-08-06 15:26:58,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1100 states, 1099 states have (on average 2.808007279344859) internal successors, (3086), 1099 states have internal predecessors, (3086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:58,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1100 states to 1100 states and 3086 transitions. [2021-08-06 15:26:58,565 INFO L78 Accepts]: Start accepts. Automaton has 1100 states and 3086 transitions. Word has length 31 [2021-08-06 15:26:58,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:58,565 INFO L470 AbstractCegarLoop]: Abstraction has 1100 states and 3086 transitions. [2021-08-06 15:26:58,566 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:58,566 INFO L276 IsEmpty]: Start isEmpty. Operand 1100 states and 3086 transitions. [2021-08-06 15:26:58,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:26:58,567 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:58,568 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:58,588 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:58,781 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:58,781 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:58,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:58,781 INFO L82 PathProgramCache]: Analyzing trace with hash 1445855202, now seen corresponding path program 20 times [2021-08-06 15:26:58,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:58,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091426186] [2021-08-06 15:26:58,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:58,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:58,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:58,816 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:58,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:58,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091426186] [2021-08-06 15:26:58,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091426186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:58,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62119027] [2021-08-06 15:26:58,817 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:26:58,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:58,817 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:58,817 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) [2021-08-06 15:26:58,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-06 15:26:59,286 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:26:59,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:26:59,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:26:59,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:26:59,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:59,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62119027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:59,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:26:59,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 15:26:59,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446361113] [2021-08-06 15:26:59,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:26:59,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:26:59,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:26:59,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:26:59,437 INFO L87 Difference]: Start difference. First operand 1100 states and 3086 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-08-06 15:26:59,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:26:59,642 INFO L93 Difference]: Finished difference Result 2053 states and 5419 transitions. [2021-08-06 15:26:59,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:26:59,642 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 31 [2021-08-06 15:26:59,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:26:59,646 INFO L225 Difference]: With dead ends: 2053 [2021-08-06 15:26:59,646 INFO L226 Difference]: Without dead ends: 2053 [2021-08-06 15:26:59,647 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 130.8ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:26:59,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2053 states. [2021-08-06 15:26:59,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2053 to 1104. [2021-08-06 15:26:59,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1104 states, 1103 states have (on average 2.8068902991840434) internal successors, (3096), 1103 states have internal predecessors, (3096), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:26:59,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1104 states to 1104 states and 3096 transitions. [2021-08-06 15:26:59,666 INFO L78 Accepts]: Start accepts. Automaton has 1104 states and 3096 transitions. Word has length 31 [2021-08-06 15:26:59,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:26:59,666 INFO L470 AbstractCegarLoop]: Abstraction has 1104 states and 3096 transitions. [2021-08-06 15:26:59,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-08-06 15:26:59,666 INFO L276 IsEmpty]: Start isEmpty. Operand 1104 states and 3096 transitions. [2021-08-06 15:26:59,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:26:59,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:26:59,668 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:26:59,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-06 15:26:59,885 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,SelfDestructingSolverStorable37 [2021-08-06 15:26:59,885 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:26:59,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:26:59,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1068884048, now seen corresponding path program 21 times [2021-08-06 15:26:59,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:26:59,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869364431] [2021-08-06 15:26:59,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:26:59,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:26:59,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:26:59,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:26:59,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:26:59,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869364431] [2021-08-06 15:26:59,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869364431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:26:59,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742433719] [2021-08-06 15:26:59,922 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:26:59,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:26:59,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:26:59,923 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) [2021-08-06 15:26:59,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-06 15:27:00,434 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 15:27:00,434 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:00,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:27:00,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:00,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:00,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742433719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:00,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:00,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 15:27:00,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115667383] [2021-08-06 15:27:00,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:27:00,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:00,609 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:27:00,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:27:00,609 INFO L87 Difference]: Start difference. First operand 1104 states and 3096 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-08-06 15:27:00,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:00,796 INFO L93 Difference]: Finished difference Result 2247 states and 5856 transitions. [2021-08-06 15:27:00,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:27:00,796 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 31 [2021-08-06 15:27:00,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:00,800 INFO L225 Difference]: With dead ends: 2247 [2021-08-06 15:27:00,800 INFO L226 Difference]: Without dead ends: 2233 [2021-08-06 15:27:00,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 118.3ms TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:27:00,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2233 states. [2021-08-06 15:27:00,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2233 to 1111. [2021-08-06 15:27:00,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1111 states, 1110 states have (on average 2.791891891891892) internal successors, (3099), 1110 states have internal predecessors, (3099), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:00,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1111 states to 1111 states and 3099 transitions. [2021-08-06 15:27:00,819 INFO L78 Accepts]: Start accepts. Automaton has 1111 states and 3099 transitions. Word has length 31 [2021-08-06 15:27:00,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:00,819 INFO L470 AbstractCegarLoop]: Abstraction has 1111 states and 3099 transitions. [2021-08-06 15:27:00,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-08-06 15:27:00,819 INFO L276 IsEmpty]: Start isEmpty. Operand 1111 states and 3099 transitions. [2021-08-06 15:27:00,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:27:00,821 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:00,821 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:00,838 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:01,025 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,SelfDestructingSolverStorable38 [2021-08-06 15:27:01,026 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:01,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:01,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1153282822, now seen corresponding path program 22 times [2021-08-06 15:27:01,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:01,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126439745] [2021-08-06 15:27:01,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:01,026 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:01,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:01,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:01,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:01,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126439745] [2021-08-06 15:27:01,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126439745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:01,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [950669311] [2021-08-06 15:27:01,058 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:27:01,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:01,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:01,059 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) [2021-08-06 15:27:01,084 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-06 15:27:01,544 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:27:01,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:01,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:27:01,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:01,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:01,699 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [950669311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:01,699 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:01,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 15:27:01,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811567720] [2021-08-06 15:27:01,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:27:01,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:01,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:27:01,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:27:01,700 INFO L87 Difference]: Start difference. First operand 1111 states and 3099 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-08-06 15:27:01,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:01,835 INFO L93 Difference]: Finished difference Result 1836 states and 4940 transitions. [2021-08-06 15:27:01,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 15:27:01,835 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 31 [2021-08-06 15:27:01,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:01,838 INFO L225 Difference]: With dead ends: 1836 [2021-08-06 15:27:01,838 INFO L226 Difference]: Without dead ends: 1808 [2021-08-06 15:27:01,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 99.6ms TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:27:01,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1808 states. [2021-08-06 15:27:01,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1808 to 1121. [2021-08-06 15:27:01,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1121 states, 1120 states have (on average 2.775) internal successors, (3108), 1120 states have internal predecessors, (3108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:01,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1121 states to 1121 states and 3108 transitions. [2021-08-06 15:27:01,862 INFO L78 Accepts]: Start accepts. Automaton has 1121 states and 3108 transitions. Word has length 31 [2021-08-06 15:27:01,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:01,862 INFO L470 AbstractCegarLoop]: Abstraction has 1121 states and 3108 transitions. [2021-08-06 15:27:01,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-08-06 15:27:01,862 INFO L276 IsEmpty]: Start isEmpty. Operand 1121 states and 3108 transitions. [2021-08-06 15:27:01,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:27:01,864 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:01,864 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:01,881 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:02,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 15:27:02,074 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:02,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:02,074 INFO L82 PathProgramCache]: Analyzing trace with hash -869449584, now seen corresponding path program 23 times [2021-08-06 15:27:02,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:02,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711782524] [2021-08-06 15:27:02,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:02,074 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:02,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:02,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:02,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:02,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711782524] [2021-08-06 15:27:02,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [711782524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:02,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620422442] [2021-08-06 15:27:02,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:27:02,104 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:02,104 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:02,105 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) [2021-08-06 15:27:02,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-06 15:27:02,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:27:02,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:02,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:27:02,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:02,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:02,766 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620422442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:02,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:02,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 15:27:02,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219857030] [2021-08-06 15:27:02,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:27:02,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:02,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:27:02,767 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:27:02,767 INFO L87 Difference]: Start difference. First operand 1121 states and 3108 transitions. Second operand has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:02,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:02,970 INFO L93 Difference]: Finished difference Result 2462 states and 6556 transitions. [2021-08-06 15:27:02,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:27:02,970 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 15:27:02,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:02,974 INFO L225 Difference]: With dead ends: 2462 [2021-08-06 15:27:02,974 INFO L226 Difference]: Without dead ends: 2408 [2021-08-06 15:27:02,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 137.3ms TimeCoverageRelationStatistics Valid=198, Invalid=402, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:27:02,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2408 states. [2021-08-06 15:27:02,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2408 to 1441. [2021-08-06 15:27:02,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1441 states, 1440 states have (on average 2.8208333333333333) internal successors, (4062), 1440 states have internal predecessors, (4062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:02,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1441 states to 1441 states and 4062 transitions. [2021-08-06 15:27:02,998 INFO L78 Accepts]: Start accepts. Automaton has 1441 states and 4062 transitions. Word has length 31 [2021-08-06 15:27:02,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:02,999 INFO L470 AbstractCegarLoop]: Abstraction has 1441 states and 4062 transitions. [2021-08-06 15:27:02,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.6363636363636362) internal successors, (40), 11 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:02,999 INFO L276 IsEmpty]: Start isEmpty. Operand 1441 states and 4062 transitions. [2021-08-06 15:27:03,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:27:03,000 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:03,001 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:03,022 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:03,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:03,218 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:03,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:03,218 INFO L82 PathProgramCache]: Analyzing trace with hash -452789944, now seen corresponding path program 24 times [2021-08-06 15:27:03,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:03,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449964852] [2021-08-06 15:27:03,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:03,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:03,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:03,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:03,246 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:03,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449964852] [2021-08-06 15:27:03,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449964852] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:03,246 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238489125] [2021-08-06 15:27:03,246 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:27:03,247 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:03,247 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:03,247 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) [2021-08-06 15:27:03,269 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-06 15:27:03,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:27:03,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:03,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:27:03,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:03,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:03,920 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238489125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:03,920 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:03,920 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-06 15:27:03,920 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165261372] [2021-08-06 15:27:03,920 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:27:03,920 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:03,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:27:03,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:27:03,921 INFO L87 Difference]: Start difference. First operand 1441 states and 4062 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:04,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:04,123 INFO L93 Difference]: Finished difference Result 2786 states and 7510 transitions. [2021-08-06 15:27:04,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:27:04,124 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 15:27:04,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:04,129 INFO L225 Difference]: With dead ends: 2786 [2021-08-06 15:27:04,129 INFO L226 Difference]: Without dead ends: 2786 [2021-08-06 15:27:04,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 128.6ms TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:27:04,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-08-06 15:27:04,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 1845. [2021-08-06 15:27:04,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1845 states, 1844 states have (on average 2.828633405639913) internal successors, (5216), 1844 states have internal predecessors, (5216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:04,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1845 states to 1845 states and 5216 transitions. [2021-08-06 15:27:04,170 INFO L78 Accepts]: Start accepts. Automaton has 1845 states and 5216 transitions. Word has length 31 [2021-08-06 15:27:04,171 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:04,171 INFO L470 AbstractCegarLoop]: Abstraction has 1845 states and 5216 transitions. [2021-08-06 15:27:04,171 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:04,171 INFO L276 IsEmpty]: Start isEmpty. Operand 1845 states and 5216 transitions. [2021-08-06 15:27:04,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:27:04,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:04,174 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:04,196 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:04,393 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:04,393 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:04,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:04,394 INFO L82 PathProgramCache]: Analyzing trace with hash -1329375800, now seen corresponding path program 25 times [2021-08-06 15:27:04,394 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:04,394 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253763015] [2021-08-06 15:27:04,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:04,394 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:04,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:04,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:04,427 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:04,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253763015] [2021-08-06 15:27:04,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253763015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:04,427 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177483691] [2021-08-06 15:27:04,427 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:27:04,428 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:04,428 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:04,428 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) [2021-08-06 15:27:04,429 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-06 15:27:04,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:04,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:27:04,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:05,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:05,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177483691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:05,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:05,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 15:27:05,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [181931144] [2021-08-06 15:27:05,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:27:05,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:05,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:27:05,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:27:05,113 INFO L87 Difference]: Start difference. First operand 1845 states and 5216 transitions. Second operand has 9 states, 9 states have (on average 4.0) 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) [2021-08-06 15:27:05,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:05,203 INFO L93 Difference]: Finished difference Result 2330 states and 6455 transitions. [2021-08-06 15:27:05,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:27:05,203 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) 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 31 [2021-08-06 15:27:05,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:05,206 INFO L225 Difference]: With dead ends: 2330 [2021-08-06 15:27:05,206 INFO L226 Difference]: Without dead ends: 2330 [2021-08-06 15:27:05,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 60.2ms TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:27:05,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2330 states. [2021-08-06 15:27:05,226 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2330 to 1887. [2021-08-06 15:27:05,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 2.829798515376458) internal successors, (5337), 1886 states have internal predecessors, (5337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:05,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 5337 transitions. [2021-08-06 15:27:05,232 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 5337 transitions. Word has length 31 [2021-08-06 15:27:05,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:05,232 INFO L470 AbstractCegarLoop]: Abstraction has 1887 states and 5337 transitions. [2021-08-06 15:27:05,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) 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) [2021-08-06 15:27:05,232 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 5337 transitions. [2021-08-06 15:27:05,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:27:05,234 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:05,234 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:05,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2021-08-06 15:27:05,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:05,449 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:05,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:05,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1571663576, now seen corresponding path program 26 times [2021-08-06 15:27:05,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:05,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082496912] [2021-08-06 15:27:05,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:05,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:05,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:05,481 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:05,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:05,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082496912] [2021-08-06 15:27:05,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082496912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:05,482 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244212045] [2021-08-06 15:27:05,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:27:05,482 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:05,482 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:05,483 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) [2021-08-06 15:27:05,508 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-06 15:27:06,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:27:06,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:06,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:27:06,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:06,173 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:06,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [244212045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:06,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:06,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-06 15:27:06,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621411120] [2021-08-06 15:27:06,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-06 15:27:06,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:06,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-06 15:27:06,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-06 15:27:06,174 INFO L87 Difference]: Start difference. First operand 1887 states and 5337 transitions. Second operand has 9 states, 9 states have (on average 4.0) 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) [2021-08-06 15:27:06,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:06,260 INFO L93 Difference]: Finished difference Result 2501 states and 6932 transitions. [2021-08-06 15:27:06,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 15:27:06,261 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) 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 31 [2021-08-06 15:27:06,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:06,264 INFO L225 Difference]: With dead ends: 2501 [2021-08-06 15:27:06,264 INFO L226 Difference]: Without dead ends: 2465 [2021-08-06 15:27:06,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 58.4ms TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:27:06,266 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2465 states. [2021-08-06 15:27:06,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2465 to 1887. [2021-08-06 15:27:06,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1887 states, 1886 states have (on average 2.8266171792152703) internal successors, (5331), 1886 states have internal predecessors, (5331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:06,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1887 states to 1887 states and 5331 transitions. [2021-08-06 15:27:06,300 INFO L78 Accepts]: Start accepts. Automaton has 1887 states and 5331 transitions. Word has length 31 [2021-08-06 15:27:06,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:06,300 INFO L470 AbstractCegarLoop]: Abstraction has 1887 states and 5331 transitions. [2021-08-06 15:27:06,300 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) 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) [2021-08-06 15:27:06,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1887 states and 5331 transitions. [2021-08-06 15:27:06,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:27:06,302 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:06,303 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:06,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:06,505 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,SelfDestructingSolverStorable43 [2021-08-06 15:27:06,505 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:06,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:06,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1475853782, now seen corresponding path program 27 times [2021-08-06 15:27:06,505 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:06,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718995377] [2021-08-06 15:27:06,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:06,506 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:06,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:06,541 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:06,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:06,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718995377] [2021-08-06 15:27:06,541 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1718995377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:06,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2038920693] [2021-08-06 15:27:06,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:27:06,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:06,541 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:06,542 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) [2021-08-06 15:27:06,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-06 15:27:07,076 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:27:07,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:07,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:27:07,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:07,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:07,263 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2038920693] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:07,263 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:07,263 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 15:27:07,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882607141] [2021-08-06 15:27:07,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:27:07,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:07,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:27:07,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:27:07,264 INFO L87 Difference]: Start difference. First operand 1887 states and 5331 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-08-06 15:27:07,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:07,429 INFO L93 Difference]: Finished difference Result 2490 states and 6843 transitions. [2021-08-06 15:27:07,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:27:07,429 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 31 [2021-08-06 15:27:07,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:07,433 INFO L225 Difference]: With dead ends: 2490 [2021-08-06 15:27:07,433 INFO L226 Difference]: Without dead ends: 2490 [2021-08-06 15:27:07,433 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 88.6ms TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:27:07,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2490 states. [2021-08-06 15:27:07,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2490 to 2067. [2021-08-06 15:27:07,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2067 states, 2066 states have (on average 2.8330106485963213) internal successors, (5853), 2066 states have internal predecessors, (5853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:07,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2067 states to 2067 states and 5853 transitions. [2021-08-06 15:27:07,460 INFO L78 Accepts]: Start accepts. Automaton has 2067 states and 5853 transitions. Word has length 31 [2021-08-06 15:27:07,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:07,460 INFO L470 AbstractCegarLoop]: Abstraction has 2067 states and 5853 transitions. [2021-08-06 15:27:07,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-08-06 15:27:07,461 INFO L276 IsEmpty]: Start isEmpty. Operand 2067 states and 5853 transitions. [2021-08-06 15:27:07,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:27:07,466 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:07,466 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:07,485 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:07,680 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:07,681 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:07,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:07,681 INFO L82 PathProgramCache]: Analyzing trace with hash 890635584, now seen corresponding path program 28 times [2021-08-06 15:27:07,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:07,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968129656] [2021-08-06 15:27:07,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:07,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:07,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:07,718 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:07,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968129656] [2021-08-06 15:27:07,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968129656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:07,718 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333926829] [2021-08-06 15:27:07,718 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:27:07,719 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:07,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:07,719 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) [2021-08-06 15:27:07,744 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-06 15:27:08,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:27:08,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:08,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:27:08,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:08,492 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:08,492 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333926829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:08,492 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:08,492 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 15:27:08,492 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126739846] [2021-08-06 15:27:08,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:27:08,493 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:08,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:27:08,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:27:08,493 INFO L87 Difference]: Start difference. First operand 2067 states and 5853 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:08,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:08,652 INFO L93 Difference]: Finished difference Result 2862 states and 7833 transitions. [2021-08-06 15:27:08,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:27:08,653 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 15:27:08,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:08,656 INFO L225 Difference]: With dead ends: 2862 [2021-08-06 15:27:08,656 INFO L226 Difference]: Without dead ends: 2838 [2021-08-06 15:27:08,656 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 115.1ms TimeCoverageRelationStatistics Valid=127, Invalid=293, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:27:08,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2838 states. [2021-08-06 15:27:08,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2838 to 2147. [2021-08-06 15:27:08,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2147 states, 2146 states have (on average 2.8355079217148185) internal successors, (6085), 2146 states have internal predecessors, (6085), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:08,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2147 states to 2147 states and 6085 transitions. [2021-08-06 15:27:08,686 INFO L78 Accepts]: Start accepts. Automaton has 2147 states and 6085 transitions. Word has length 31 [2021-08-06 15:27:08,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:08,686 INFO L470 AbstractCegarLoop]: Abstraction has 2147 states and 6085 transitions. [2021-08-06 15:27:08,686 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:08,686 INFO L276 IsEmpty]: Start isEmpty. Operand 2147 states and 6085 transitions. [2021-08-06 15:27:08,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:27:08,689 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:08,689 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:08,708 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:08,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:08,902 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:08,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:08,902 INFO L82 PathProgramCache]: Analyzing trace with hash -442078328, now seen corresponding path program 29 times [2021-08-06 15:27:08,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:08,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336797576] [2021-08-06 15:27:08,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:08,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:08,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:08,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:08,934 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:08,934 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336797576] [2021-08-06 15:27:08,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336797576] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:08,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84085476] [2021-08-06 15:27:08,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:27:08,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:08,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:08,935 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) [2021-08-06 15:27:08,936 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-06 15:27:09,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:27:09,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:09,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:27:09,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:09,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:09,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84085476] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:09,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:09,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 15:27:09,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [556250470] [2021-08-06 15:27:09,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:27:09,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:09,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:27:09,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:27:09,694 INFO L87 Difference]: Start difference. First operand 2147 states and 6085 transitions. Second operand has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-08-06 15:27:09,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:09,958 INFO L93 Difference]: Finished difference Result 3330 states and 8999 transitions. [2021-08-06 15:27:09,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:27:09,959 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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 31 [2021-08-06 15:27:09,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:09,963 INFO L225 Difference]: With dead ends: 3330 [2021-08-06 15:27:09,963 INFO L226 Difference]: Without dead ends: 3330 [2021-08-06 15:27:09,963 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 135.9ms TimeCoverageRelationStatistics Valid=215, Invalid=385, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:27:09,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3330 states. [2021-08-06 15:27:09,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3330 to 2317. [2021-08-06 15:27:09,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2317 states, 2316 states have (on average 2.8626943005181347) internal successors, (6630), 2316 states have internal predecessors, (6630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:09,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2317 states to 2317 states and 6630 transitions. [2021-08-06 15:27:09,999 INFO L78 Accepts]: Start accepts. Automaton has 2317 states and 6630 transitions. Word has length 31 [2021-08-06 15:27:09,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:09,999 INFO L470 AbstractCegarLoop]: Abstraction has 2317 states and 6630 transitions. [2021-08-06 15:27:09,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.2) internal successors, (42), 10 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) [2021-08-06 15:27:09,999 INFO L276 IsEmpty]: Start isEmpty. Operand 2317 states and 6630 transitions. [2021-08-06 15:27:10,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:27:10,003 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:10,003 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:10,025 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:10,220 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,SelfDestructingSolverStorable46 [2021-08-06 15:27:10,221 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:10,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:10,221 INFO L82 PathProgramCache]: Analyzing trace with hash -652775374, now seen corresponding path program 30 times [2021-08-06 15:27:10,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:10,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [452239379] [2021-08-06 15:27:10,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:10,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:10,251 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:10,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:10,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [452239379] [2021-08-06 15:27:10,252 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [452239379] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:10,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223767763] [2021-08-06 15:27:10,252 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:27:10,252 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:10,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:10,253 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) [2021-08-06 15:27:10,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-06 15:27:10,869 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-08-06 15:27:10,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:10,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:27:10,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:11,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:11,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223767763] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:11,039 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:11,039 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 15:27:11,039 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295395434] [2021-08-06 15:27:11,039 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:27:11,039 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:11,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:27:11,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:27:11,040 INFO L87 Difference]: Start difference. First operand 2317 states and 6630 transitions. Second operand has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:11,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:11,247 INFO L93 Difference]: Finished difference Result 3536 states and 9738 transitions. [2021-08-06 15:27:11,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:27:11,247 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 15:27:11,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:11,254 INFO L225 Difference]: With dead ends: 3536 [2021-08-06 15:27:11,255 INFO L226 Difference]: Without dead ends: 3524 [2021-08-06 15:27:11,255 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 127.0ms TimeCoverageRelationStatistics Valid=139, Invalid=323, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:27:11,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3524 states. [2021-08-06 15:27:11,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3524 to 2553. [2021-08-06 15:27:11,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2553 states, 2552 states have (on average 2.865203761755486) internal successors, (7312), 2552 states have internal predecessors, (7312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:11,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2553 states to 2553 states and 7312 transitions. [2021-08-06 15:27:11,306 INFO L78 Accepts]: Start accepts. Automaton has 2553 states and 7312 transitions. Word has length 31 [2021-08-06 15:27:11,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:11,306 INFO L470 AbstractCegarLoop]: Abstraction has 2553 states and 7312 transitions. [2021-08-06 15:27:11,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.9) internal successors, (39), 10 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:11,306 INFO L276 IsEmpty]: Start isEmpty. Operand 2553 states and 7312 transitions. [2021-08-06 15:27:11,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:27:11,310 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:11,310 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:11,329 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:11,527 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,SelfDestructingSolverStorable47 [2021-08-06 15:27:11,527 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:11,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:11,528 INFO L82 PathProgramCache]: Analyzing trace with hash 75976444, now seen corresponding path program 31 times [2021-08-06 15:27:11,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:11,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026917063] [2021-08-06 15:27:11,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:11,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:11,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:11,558 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:11,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:11,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026917063] [2021-08-06 15:27:11,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026917063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:11,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110820322] [2021-08-06 15:27:11,559 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:27:11,559 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:11,559 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:11,561 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) [2021-08-06 15:27:11,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-06 15:27:12,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:12,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:27:12,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:12,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:12,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110820322] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:12,329 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:12,329 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 15:27:12,329 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859638037] [2021-08-06 15:27:12,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:27:12,330 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:12,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:27:12,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:27:12,330 INFO L87 Difference]: Start difference. First operand 2553 states and 7312 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-08-06 15:27:12,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:12,554 INFO L93 Difference]: Finished difference Result 3564 states and 9736 transitions. [2021-08-06 15:27:12,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:27:12,554 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 31 [2021-08-06 15:27:12,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:12,559 INFO L225 Difference]: With dead ends: 3564 [2021-08-06 15:27:12,559 INFO L226 Difference]: Without dead ends: 3564 [2021-08-06 15:27:12,559 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 140.4ms TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:27:12,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3564 states. [2021-08-06 15:27:12,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3564 to 2557. [2021-08-06 15:27:12,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2557 states, 2556 states have (on average 2.856025039123631) internal successors, (7300), 2556 states have internal predecessors, (7300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:12,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2557 states to 2557 states and 7300 transitions. [2021-08-06 15:27:12,600 INFO L78 Accepts]: Start accepts. Automaton has 2557 states and 7300 transitions. Word has length 31 [2021-08-06 15:27:12,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:12,601 INFO L470 AbstractCegarLoop]: Abstraction has 2557 states and 7300 transitions. [2021-08-06 15:27:12,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-08-06 15:27:12,601 INFO L276 IsEmpty]: Start isEmpty. Operand 2557 states and 7300 transitions. [2021-08-06 15:27:12,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:27:12,604 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:12,604 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:12,630 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:12,822 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,SelfDestructingSolverStorable48 [2021-08-06 15:27:12,822 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:12,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:12,822 INFO L82 PathProgramCache]: Analyzing trace with hash -300994710, now seen corresponding path program 32 times [2021-08-06 15:27:12,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:12,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758053219] [2021-08-06 15:27:12,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:12,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:12,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:12,863 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:12,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:12,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758053219] [2021-08-06 15:27:12,864 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758053219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:12,864 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885558058] [2021-08-06 15:27:12,864 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:27:12,864 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:12,864 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:12,864 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) [2021-08-06 15:27:12,865 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-06 15:27:13,463 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:27:13,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:13,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:27:13,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:13,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:13,615 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885558058] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:13,615 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:13,615 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 15:27:13,615 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [703718359] [2021-08-06 15:27:13,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:27:13,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:13,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:27:13,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:27:13,615 INFO L87 Difference]: Start difference. First operand 2557 states and 7300 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-08-06 15:27:13,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:13,799 INFO L93 Difference]: Finished difference Result 3120 states and 8617 transitions. [2021-08-06 15:27:13,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:27:13,800 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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 31 [2021-08-06 15:27:13,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:13,804 INFO L225 Difference]: With dead ends: 3120 [2021-08-06 15:27:13,804 INFO L226 Difference]: Without dead ends: 3106 [2021-08-06 15:27:13,815 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 114.4ms TimeCoverageRelationStatistics Valid=149, Invalid=271, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:27:13,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3106 states. [2021-08-06 15:27:13,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3106 to 2571. [2021-08-06 15:27:13,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2571 states, 2570 states have (on average 2.849805447470817) internal successors, (7324), 2570 states have internal predecessors, (7324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:13,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2571 states to 2571 states and 7324 transitions. [2021-08-06 15:27:13,848 INFO L78 Accepts]: Start accepts. Automaton has 2571 states and 7324 transitions. Word has length 31 [2021-08-06 15:27:13,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:13,848 INFO L470 AbstractCegarLoop]: Abstraction has 2571 states and 7324 transitions. [2021-08-06 15:27:13,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 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) [2021-08-06 15:27:13,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2571 states and 7324 transitions. [2021-08-06 15:27:13,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:27:13,851 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:13,851 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:13,869 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:14,051 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,SelfDestructingSolverStorable49 [2021-08-06 15:27:14,052 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:14,052 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:14,052 INFO L82 PathProgramCache]: Analyzing trace with hash 1996636068, now seen corresponding path program 33 times [2021-08-06 15:27:14,052 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:14,052 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799373424] [2021-08-06 15:27:14,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:14,052 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:14,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:14,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:14,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:14,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799373424] [2021-08-06 15:27:14,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799373424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:14,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335635800] [2021-08-06 15:27:14,085 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:27:14,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:14,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:14,086 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) [2021-08-06 15:27:14,086 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-06 15:27:14,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:27:14,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:14,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:27:14,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:14,890 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:14,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335635800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:14,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:14,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 15:27:14,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305183045] [2021-08-06 15:27:14,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:27:14,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:14,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:27:14,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:27:14,892 INFO L87 Difference]: Start difference. First operand 2571 states and 7324 transitions. Second operand has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2021-08-06 15:27:15,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:15,092 INFO L93 Difference]: Finished difference Result 3644 states and 10056 transitions. [2021-08-06 15:27:15,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:27:15,092 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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 31 [2021-08-06 15:27:15,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:15,097 INFO L225 Difference]: With dead ends: 3644 [2021-08-06 15:27:15,098 INFO L226 Difference]: Without dead ends: 3644 [2021-08-06 15:27:15,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 140.9ms TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:27:15,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3644 states. [2021-08-06 15:27:15,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3644 to 2693. [2021-08-06 15:27:15,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2693 states, 2692 states have (on average 2.846582466567608) internal successors, (7663), 2692 states have internal predecessors, (7663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:15,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2693 states to 2693 states and 7663 transitions. [2021-08-06 15:27:15,138 INFO L78 Accepts]: Start accepts. Automaton has 2693 states and 7663 transitions. Word has length 31 [2021-08-06 15:27:15,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:15,138 INFO L470 AbstractCegarLoop]: Abstraction has 2693 states and 7663 transitions. [2021-08-06 15:27:15,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.909090909090909) internal successors, (43), 11 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) [2021-08-06 15:27:15,139 INFO L276 IsEmpty]: Start isEmpty. Operand 2693 states and 7663 transitions. [2021-08-06 15:27:15,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:27:15,143 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:15,143 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:15,169 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:15,352 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:15,352 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:15,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:15,352 INFO L82 PathProgramCache]: Analyzing trace with hash -1399035858, now seen corresponding path program 34 times [2021-08-06 15:27:15,352 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:15,352 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [636371979] [2021-08-06 15:27:15,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:15,352 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:15,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:15,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:15,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:15,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [636371979] [2021-08-06 15:27:15,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [636371979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:15,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4526502] [2021-08-06 15:27:15,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:27:15,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:15,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:15,392 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) [2021-08-06 15:27:15,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-06 15:27:16,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:27:16,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:16,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:27:16,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:16,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:16,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [4526502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:16,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:16,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-06 15:27:16,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535178212] [2021-08-06 15:27:16,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:27:16,235 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:16,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:27:16,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:27:16,236 INFO L87 Difference]: Start difference. First operand 2693 states and 7663 transitions. Second operand has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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) [2021-08-06 15:27:16,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:16,433 INFO L93 Difference]: Finished difference Result 4193 states and 11519 transitions. [2021-08-06 15:27:16,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:27:16,433 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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 31 [2021-08-06 15:27:16,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:16,438 INFO L225 Difference]: With dead ends: 4193 [2021-08-06 15:27:16,438 INFO L226 Difference]: Without dead ends: 4193 [2021-08-06 15:27:16,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 132.8ms TimeCoverageRelationStatistics Valid=185, Invalid=321, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:27:16,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4193 states. [2021-08-06 15:27:16,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4193 to 3161. [2021-08-06 15:27:16,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3161 states, 3160 states have (on average 2.854113924050633) internal successors, (9019), 3160 states have internal predecessors, (9019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:16,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3161 states to 3161 states and 9019 transitions. [2021-08-06 15:27:16,484 INFO L78 Accepts]: Start accepts. Automaton has 3161 states and 9019 transitions. Word has length 31 [2021-08-06 15:27:16,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:16,484 INFO L470 AbstractCegarLoop]: Abstraction has 3161 states and 9019 transitions. [2021-08-06 15:27:16,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.3) internal successors, (43), 10 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) [2021-08-06 15:27:16,485 INFO L276 IsEmpty]: Start isEmpty. Operand 3161 states and 9019 transitions. [2021-08-06 15:27:16,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:27:16,489 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:16,489 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:16,508 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:16,704 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,SelfDestructingSolverStorable51 [2021-08-06 15:27:16,705 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:16,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:16,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1257952240, now seen corresponding path program 35 times [2021-08-06 15:27:16,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:16,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448013089] [2021-08-06 15:27:16,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:16,705 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:16,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:16,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:27:16,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:16,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448013089] [2021-08-06 15:27:16,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448013089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:16,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103624479] [2021-08-06 15:27:16,734 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:27:16,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:16,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:16,735 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) [2021-08-06 15:27:16,736 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-06 15:27:17,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:27:17,396 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:17,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:27:17,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:17,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:17,565 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103624479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:17,565 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:17,565 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7] total 10 [2021-08-06 15:27:17,565 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001124742] [2021-08-06 15:27:17,565 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 15:27:17,565 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:17,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 15:27:17,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 15:27:17,566 INFO L87 Difference]: Start difference. First operand 3161 states and 9019 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:17,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:17,742 INFO L93 Difference]: Finished difference Result 4026 states and 11093 transitions. [2021-08-06 15:27:17,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:27:17,742 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 15:27:17,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:17,748 INFO L225 Difference]: With dead ends: 4026 [2021-08-06 15:27:17,748 INFO L226 Difference]: Without dead ends: 4012 [2021-08-06 15:27:17,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 122.1ms TimeCoverageRelationStatistics Valid=165, Invalid=297, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:27:17,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4012 states. [2021-08-06 15:27:17,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4012 to 3057. [2021-08-06 15:27:17,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3057 states, 3056 states have (on average 2.8406413612565444) internal successors, (8681), 3056 states have internal predecessors, (8681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:17,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3057 states to 3057 states and 8681 transitions. [2021-08-06 15:27:17,791 INFO L78 Accepts]: Start accepts. Automaton has 3057 states and 8681 transitions. Word has length 31 [2021-08-06 15:27:17,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:17,791 INFO L470 AbstractCegarLoop]: Abstraction has 3057 states and 8681 transitions. [2021-08-06 15:27:17,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:17,792 INFO L276 IsEmpty]: Start isEmpty. Operand 3057 states and 8681 transitions. [2021-08-06 15:27:17,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-06 15:27:17,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:17,795 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:17,813 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:17,996 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,SelfDestructingSolverStorable52 [2021-08-06 15:27:17,996 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:17,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:17,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1173553466, now seen corresponding path program 36 times [2021-08-06 15:27:17,996 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:17,996 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068944899] [2021-08-06 15:27:17,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:17,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:18,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:18,034 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:18,034 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:18,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068944899] [2021-08-06 15:27:18,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068944899] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:18,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611802127] [2021-08-06 15:27:18,034 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:27:18,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:18,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:18,035 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) [2021-08-06 15:27:18,036 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-06 15:27:18,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:27:18,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:18,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-06 15:27:18,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:18,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:18,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [611802127] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:18,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:18,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-08-06 15:27:18,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553417099] [2021-08-06 15:27:18,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 15:27:18,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:18,874 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 15:27:18,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2021-08-06 15:27:18,875 INFO L87 Difference]: Start difference. First operand 3057 states and 8681 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:19,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:19,053 INFO L93 Difference]: Finished difference Result 4063 states and 11292 transitions. [2021-08-06 15:27:19,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 15:27:19,053 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-06 15:27:19,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:19,059 INFO L225 Difference]: With dead ends: 4063 [2021-08-06 15:27:19,059 INFO L226 Difference]: Without dead ends: 4007 [2021-08-06 15:27:19,059 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 127.8ms TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:27:19,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2021-08-06 15:27:19,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 3327. [2021-08-06 15:27:19,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3327 states, 3326 states have (on average 2.850871918220084) internal successors, (9482), 3326 states have internal predecessors, (9482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:19,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3327 states to 3327 states and 9482 transitions. [2021-08-06 15:27:19,108 INFO L78 Accepts]: Start accepts. Automaton has 3327 states and 9482 transitions. Word has length 31 [2021-08-06 15:27:19,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:19,108 INFO L470 AbstractCegarLoop]: Abstraction has 3327 states and 9482 transitions. [2021-08-06 15:27:19,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:19,108 INFO L276 IsEmpty]: Start isEmpty. Operand 3327 states and 9482 transitions. [2021-08-06 15:27:19,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:27:19,113 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:19,113 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:19,131 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-06 15:27:19,327 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,SelfDestructingSolverStorable53 [2021-08-06 15:27:19,327 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:19,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:19,328 INFO L82 PathProgramCache]: Analyzing trace with hash 303999700, now seen corresponding path program 37 times [2021-08-06 15:27:19,328 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:19,328 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142842156] [2021-08-06 15:27:19,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:19,328 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:19,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:19,501 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:19,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:19,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142842156] [2021-08-06 15:27:19,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142842156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:19,501 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576844084] [2021-08-06 15:27:19,502 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:27:19,502 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:19,502 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:19,502 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) [2021-08-06 15:27:19,503 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-06 15:27:20,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:20,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:27:20,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:20,681 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 15:27:20,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 37 [2021-08-06 15:27:20,719 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:20,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [576844084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:20,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:20,719 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-06 15:27:20,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033225733] [2021-08-06 15:27:20,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:27:20,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:20,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:27:20,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:27:20,720 INFO L87 Difference]: Start difference. First operand 3327 states and 9482 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:20,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:20,891 INFO L93 Difference]: Finished difference Result 5088 states and 14550 transitions. [2021-08-06 15:27:20,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:27:20,892 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:27:20,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:20,899 INFO L225 Difference]: With dead ends: 5088 [2021-08-06 15:27:20,899 INFO L226 Difference]: Without dead ends: 5050 [2021-08-06 15:27:20,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 176.3ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:27:20,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5050 states. [2021-08-06 15:27:20,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5050 to 3355. [2021-08-06 15:27:20,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3355 states, 3354 states have (on average 2.8449612403100777) internal successors, (9542), 3354 states have internal predecessors, (9542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:20,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3355 states to 3355 states and 9542 transitions. [2021-08-06 15:27:20,954 INFO L78 Accepts]: Start accepts. Automaton has 3355 states and 9542 transitions. Word has length 34 [2021-08-06 15:27:20,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:20,955 INFO L470 AbstractCegarLoop]: Abstraction has 3355 states and 9542 transitions. [2021-08-06 15:27:20,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:20,955 INFO L276 IsEmpty]: Start isEmpty. Operand 3355 states and 9542 transitions. [2021-08-06 15:27:20,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:27:20,959 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:20,959 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:20,977 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-08-06 15:27:21,160 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:21,160 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:21,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:21,160 INFO L82 PathProgramCache]: Analyzing trace with hash -1489014850, now seen corresponding path program 38 times [2021-08-06 15:27:21,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:21,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859361743] [2021-08-06 15:27:21,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:21,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:21,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:21,309 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:21,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:21,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859361743] [2021-08-06 15:27:21,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859361743] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:21,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106578718] [2021-08-06 15:27:21,309 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:27:21,309 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:21,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:21,325 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) [2021-08-06 15:27:21,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-06 15:27:22,044 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:27:22,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:22,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:27:22,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:22,493 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:27:22,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 33 [2021-08-06 15:27:22,560 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:22,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106578718] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:22,560 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:22,560 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 15:27:22,560 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804109336] [2021-08-06 15:27:22,561 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:27:22,561 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:22,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:27:22,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:27:22,562 INFO L87 Difference]: Start difference. First operand 3355 states and 9542 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:22,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:22,806 INFO L93 Difference]: Finished difference Result 6932 states and 19936 transitions. [2021-08-06 15:27:22,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:27:22,807 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:27:22,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:22,817 INFO L225 Difference]: With dead ends: 6932 [2021-08-06 15:27:22,818 INFO L226 Difference]: Without dead ends: 6850 [2021-08-06 15:27:22,818 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 203.3ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:27:22,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6850 states. [2021-08-06 15:27:22,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6850 to 4710. [2021-08-06 15:27:22,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4710 states, 4709 states have (on average 2.8789551921851775) internal successors, (13557), 4709 states have internal predecessors, (13557), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:22,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4710 states to 4710 states and 13557 transitions. [2021-08-06 15:27:22,889 INFO L78 Accepts]: Start accepts. Automaton has 4710 states and 13557 transitions. Word has length 34 [2021-08-06 15:27:22,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:22,889 INFO L470 AbstractCegarLoop]: Abstraction has 4710 states and 13557 transitions. [2021-08-06 15:27:22,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:22,889 INFO L276 IsEmpty]: Start isEmpty. Operand 4710 states and 13557 transitions. [2021-08-06 15:27:22,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:27:22,895 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:22,895 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:22,913 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:23,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:23,096 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:23,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:23,096 INFO L82 PathProgramCache]: Analyzing trace with hash -892908934, now seen corresponding path program 39 times [2021-08-06 15:27:23,096 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:23,096 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179485994] [2021-08-06 15:27:23,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:23,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:23,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:23,231 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:23,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:23,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179485994] [2021-08-06 15:27:23,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179485994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:23,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843256968] [2021-08-06 15:27:23,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:27:23,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:23,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:23,233 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) [2021-08-06 15:27:23,234 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-06 15:27:23,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:27:23,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:23,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:27:23,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:24,420 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:27:24,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:27:24,464 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:24,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1843256968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:24,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:24,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 15:27:24,465 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1449518495] [2021-08-06 15:27:24,465 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:27:24,465 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:24,465 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:27:24,465 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:27:24,465 INFO L87 Difference]: Start difference. First operand 4710 states and 13557 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:24,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:24,724 INFO L93 Difference]: Finished difference Result 6936 states and 19938 transitions. [2021-08-06 15:27:24,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:27:24,724 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:27:24,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:24,733 INFO L225 Difference]: With dead ends: 6936 [2021-08-06 15:27:24,734 INFO L226 Difference]: Without dead ends: 6824 [2021-08-06 15:27:24,734 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 201.9ms TimeCoverageRelationStatistics Valid=79, Invalid=427, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:27:24,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6824 states. [2021-08-06 15:27:24,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6824 to 4404. [2021-08-06 15:27:24,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4404 states, 4403 states have (on average 2.865319100613218) internal successors, (12616), 4403 states have internal predecessors, (12616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:24,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4404 states to 4404 states and 12616 transitions. [2021-08-06 15:27:24,799 INFO L78 Accepts]: Start accepts. Automaton has 4404 states and 12616 transitions. Word has length 34 [2021-08-06 15:27:24,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:24,799 INFO L470 AbstractCegarLoop]: Abstraction has 4404 states and 12616 transitions. [2021-08-06 15:27:24,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:24,799 INFO L276 IsEmpty]: Start isEmpty. Operand 4404 states and 12616 transitions. [2021-08-06 15:27:24,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:27:24,805 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:24,805 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:24,823 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-06 15:27:25,005 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,SelfDestructingSolverStorable56 [2021-08-06 15:27:25,006 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:25,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:25,006 INFO L82 PathProgramCache]: Analyzing trace with hash -1950432462, now seen corresponding path program 40 times [2021-08-06 15:27:25,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:25,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621085087] [2021-08-06 15:27:25,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:25,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:25,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:25,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:25,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621085087] [2021-08-06 15:27:25,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [621085087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:25,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332435534] [2021-08-06 15:27:25,142 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:27:25,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:25,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:25,143 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) [2021-08-06 15:27:25,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-06 15:27:25,918 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:27:25,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:25,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:27:25,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:26,403 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:27:26,403 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:27:26,456 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:26,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332435534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:26,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:26,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 15:27:26,456 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2136480459] [2021-08-06 15:27:26,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:27:26,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:26,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:27:26,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:27:26,457 INFO L87 Difference]: Start difference. First operand 4404 states and 12616 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:26,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:26,675 INFO L93 Difference]: Finished difference Result 6717 states and 19331 transitions. [2021-08-06 15:27:26,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:27:26,676 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:27:26,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:26,686 INFO L225 Difference]: With dead ends: 6717 [2021-08-06 15:27:26,686 INFO L226 Difference]: Without dead ends: 6641 [2021-08-06 15:27:26,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 174.6ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:27:26,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6641 states. [2021-08-06 15:27:26,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6641 to 4682. [2021-08-06 15:27:26,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4682 states, 4681 states have (on average 2.87267677846614) internal successors, (13447), 4681 states have internal predecessors, (13447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:26,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4682 states to 4682 states and 13447 transitions. [2021-08-06 15:27:26,757 INFO L78 Accepts]: Start accepts. Automaton has 4682 states and 13447 transitions. Word has length 34 [2021-08-06 15:27:26,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:26,757 INFO L470 AbstractCegarLoop]: Abstraction has 4682 states and 13447 transitions. [2021-08-06 15:27:26,757 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:26,757 INFO L276 IsEmpty]: Start isEmpty. Operand 4682 states and 13447 transitions. [2021-08-06 15:27:26,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:27:26,763 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:26,763 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:26,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-06 15:27:26,963 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,SelfDestructingSolverStorable57 [2021-08-06 15:27:26,963 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:26,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:26,964 INFO L82 PathProgramCache]: Analyzing trace with hash -771857640, now seen corresponding path program 41 times [2021-08-06 15:27:26,964 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:26,964 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811034552] [2021-08-06 15:27:26,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:26,964 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:26,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:27,113 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:27,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:27,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811034552] [2021-08-06 15:27:27,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [811034552] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:27,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691982975] [2021-08-06 15:27:27,113 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:27:27,113 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:27,113 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:27,114 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) [2021-08-06 15:27:27,114 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-06 15:27:27,923 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:27:27,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:27,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:27:27,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:28,329 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:27:28,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:27:28,369 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:28,369 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691982975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:28,369 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:28,369 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 15:27:28,369 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938911311] [2021-08-06 15:27:28,369 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:27:28,369 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:28,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:27:28,370 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:27:28,370 INFO L87 Difference]: Start difference. First operand 4682 states and 13447 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:28,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:28,544 INFO L93 Difference]: Finished difference Result 6651 states and 19193 transitions. [2021-08-06 15:27:28,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:27:28,545 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:27:28,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:28,555 INFO L225 Difference]: With dead ends: 6651 [2021-08-06 15:27:28,555 INFO L226 Difference]: Without dead ends: 6613 [2021-08-06 15:27:28,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 147.2ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:27:28,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6613 states. [2021-08-06 15:27:28,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6613 to 4704. [2021-08-06 15:27:28,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4704 states, 4703 states have (on average 2.8730597490963214) internal successors, (13512), 4703 states have internal predecessors, (13512), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:28,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4704 states to 4704 states and 13512 transitions. [2021-08-06 15:27:28,628 INFO L78 Accepts]: Start accepts. Automaton has 4704 states and 13512 transitions. Word has length 34 [2021-08-06 15:27:28,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:28,628 INFO L470 AbstractCegarLoop]: Abstraction has 4704 states and 13512 transitions. [2021-08-06 15:27:28,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:28,628 INFO L276 IsEmpty]: Start isEmpty. Operand 4704 states and 13512 transitions. [2021-08-06 15:27:28,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:27:28,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:28,634 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:28,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-06 15:27:28,834 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,SelfDestructingSolverStorable58 [2021-08-06 15:27:28,834 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:28,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:28,835 INFO L82 PathProgramCache]: Analyzing trace with hash 464450188, now seen corresponding path program 42 times [2021-08-06 15:27:28,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:28,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1847484908] [2021-08-06 15:27:28,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:28,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:28,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:28,974 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:28,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:28,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1847484908] [2021-08-06 15:27:28,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1847484908] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:28,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348427503] [2021-08-06 15:27:28,974 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:27:28,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:28,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:28,975 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) [2021-08-06 15:27:28,977 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-06 15:27:29,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:27:29,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:29,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:27:29,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:30,151 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:27:30,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 26 [2021-08-06 15:27:30,186 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:30,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348427503] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:30,187 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:30,187 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-06 15:27:30,187 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950140807] [2021-08-06 15:27:30,187 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:27:30,187 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:30,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:27:30,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:27:30,187 INFO L87 Difference]: Start difference. First operand 4704 states and 13512 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:30,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:30,644 INFO L93 Difference]: Finished difference Result 7194 states and 20574 transitions. [2021-08-06 15:27:30,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:27:30,644 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:27:30,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:30,655 INFO L225 Difference]: With dead ends: 7194 [2021-08-06 15:27:30,655 INFO L226 Difference]: Without dead ends: 7092 [2021-08-06 15:27:30,656 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 380.8ms TimeCoverageRelationStatistics Valid=113, Invalid=817, Unknown=0, NotChecked=0, Total=930 [2021-08-06 15:27:30,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7092 states. [2021-08-06 15:27:30,734 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7092 to 6468. [2021-08-06 15:27:30,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6468 states, 6467 states have (on average 2.9008813978660895) internal successors, (18760), 6467 states have internal predecessors, (18760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:30,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6468 states to 6468 states and 18760 transitions. [2021-08-06 15:27:30,752 INFO L78 Accepts]: Start accepts. Automaton has 6468 states and 18760 transitions. Word has length 34 [2021-08-06 15:27:30,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:30,752 INFO L470 AbstractCegarLoop]: Abstraction has 6468 states and 18760 transitions. [2021-08-06 15:27:30,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:30,752 INFO L276 IsEmpty]: Start isEmpty. Operand 6468 states and 18760 transitions. [2021-08-06 15:27:30,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:27:30,761 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:30,761 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:30,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:30,961 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:30,962 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:30,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:30,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1740954252, now seen corresponding path program 43 times [2021-08-06 15:27:30,962 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:30,962 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523576404] [2021-08-06 15:27:30,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:30,962 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:30,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:31,105 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:31,105 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:31,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523576404] [2021-08-06 15:27:31,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1523576404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:31,106 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887230018] [2021-08-06 15:27:31,106 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:27:31,106 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:31,106 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:31,106 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) [2021-08-06 15:27:31,107 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-06 15:27:31,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:31,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:27:31,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:32,411 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:27:32,412 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:27:32,446 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:32,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [887230018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:32,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:32,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-08-06 15:27:32,446 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612906820] [2021-08-06 15:27:32,446 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:27:32,446 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:32,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:27:32,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:27:32,447 INFO L87 Difference]: Start difference. First operand 6468 states and 18760 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:32,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:32,703 INFO L93 Difference]: Finished difference Result 7452 states and 21366 transitions. [2021-08-06 15:27:32,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:27:32,703 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:27:32,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:32,715 INFO L225 Difference]: With dead ends: 7452 [2021-08-06 15:27:32,715 INFO L226 Difference]: Without dead ends: 7330 [2021-08-06 15:27:32,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 183.6ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:27:32,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7330 states. [2021-08-06 15:27:32,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7330 to 5896. [2021-08-06 15:27:32,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5896 states, 5895 states have (on average 2.891263782866836) internal successors, (17044), 5895 states have internal predecessors, (17044), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:32,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5896 states to 5896 states and 17044 transitions. [2021-08-06 15:27:32,805 INFO L78 Accepts]: Start accepts. Automaton has 5896 states and 17044 transitions. Word has length 34 [2021-08-06 15:27:32,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:32,805 INFO L470 AbstractCegarLoop]: Abstraction has 5896 states and 17044 transitions. [2021-08-06 15:27:32,805 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:32,805 INFO L276 IsEmpty]: Start isEmpty. Operand 5896 states and 17044 transitions. [2021-08-06 15:27:32,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:27:32,813 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:32,813 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:32,833 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-06 15:27:33,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:33,013 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:33,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:33,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1003407788, now seen corresponding path program 44 times [2021-08-06 15:27:33,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:33,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720030934] [2021-08-06 15:27:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:33,014 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:33,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:33,140 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:33,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:33,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720030934] [2021-08-06 15:27:33,141 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720030934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:33,141 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553681003] [2021-08-06 15:27:33,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:27:33,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:33,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:33,141 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) [2021-08-06 15:27:33,144 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-06 15:27:34,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:27:34,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:34,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:27:34,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:34,470 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:27:34,470 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:27:34,525 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:34,526 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1553681003] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:34,526 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:34,526 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-08-06 15:27:34,526 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497885778] [2021-08-06 15:27:34,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:27:34,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:34,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:27:34,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:27:34,526 INFO L87 Difference]: Start difference. First operand 5896 states and 17044 transitions. Second operand has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:34,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:34,704 INFO L93 Difference]: Finished difference Result 6556 states and 18704 transitions. [2021-08-06 15:27:34,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:27:34,705 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:27:34,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:34,714 INFO L225 Difference]: With dead ends: 6556 [2021-08-06 15:27:34,714 INFO L226 Difference]: Without dead ends: 6480 [2021-08-06 15:27:34,715 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 159.5ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:27:34,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6480 states. [2021-08-06 15:27:34,770 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6480 to 5562. [2021-08-06 15:27:34,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5562 states, 5561 states have (on average 2.88563208056105) internal successors, (16047), 5561 states have internal predecessors, (16047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:34,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5562 states to 5562 states and 16047 transitions. [2021-08-06 15:27:34,784 INFO L78 Accepts]: Start accepts. Automaton has 5562 states and 16047 transitions. Word has length 34 [2021-08-06 15:27:34,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:34,784 INFO L470 AbstractCegarLoop]: Abstraction has 5562 states and 16047 transitions. [2021-08-06 15:27:34,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0588235294117645) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:34,784 INFO L276 IsEmpty]: Start isEmpty. Operand 5562 states and 16047 transitions. [2021-08-06 15:27:34,790 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:27:34,790 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:34,790 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:34,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-06 15:27:34,991 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:34,991 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:34,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:34,991 INFO L82 PathProgramCache]: Analyzing trace with hash -1647518452, now seen corresponding path program 45 times [2021-08-06 15:27:34,991 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:34,991 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104919138] [2021-08-06 15:27:34,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:34,991 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:34,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:35,157 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:35,157 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:35,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104919138] [2021-08-06 15:27:35,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104919138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:35,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521557340] [2021-08-06 15:27:35,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:27:35,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:35,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:35,159 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) [2021-08-06 15:27:35,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-06 15:27:36,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:27:36,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:36,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:27:36,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:36,528 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:27:36,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:27:36,569 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:36,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521557340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:36,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:36,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:27:36,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656438024] [2021-08-06 15:27:36,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:27:36,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:36,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:27:36,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:27:36,570 INFO L87 Difference]: Start difference. First operand 5562 states and 16047 transitions. Second operand has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:36,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:36,761 INFO L93 Difference]: Finished difference Result 6381 states and 18213 transitions. [2021-08-06 15:27:36,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:27:36,761 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:27:36,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:36,772 INFO L225 Difference]: With dead ends: 6381 [2021-08-06 15:27:36,772 INFO L226 Difference]: Without dead ends: 6305 [2021-08-06 15:27:36,772 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 183.8ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:27:36,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6305 states. [2021-08-06 15:27:36,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6305 to 5827. [2021-08-06 15:27:36,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5827 states, 5826 states have (on average 2.8884311706144867) internal successors, (16828), 5826 states have internal predecessors, (16828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:36,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5827 states to 5827 states and 16828 transitions. [2021-08-06 15:27:36,848 INFO L78 Accepts]: Start accepts. Automaton has 5827 states and 16828 transitions. Word has length 34 [2021-08-06 15:27:36,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:36,848 INFO L470 AbstractCegarLoop]: Abstraction has 5827 states and 16828 transitions. [2021-08-06 15:27:36,849 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.888888888888889) internal successors, (52), 17 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:36,849 INFO L276 IsEmpty]: Start isEmpty. Operand 5827 states and 16828 transitions. [2021-08-06 15:27:36,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:27:36,856 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:36,856 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:36,875 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2021-08-06 15:27:37,056 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,SelfDestructingSolverStorable62 [2021-08-06 15:27:37,057 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:37,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:37,057 INFO L82 PathProgramCache]: Analyzing trace with hash 801709088, now seen corresponding path program 46 times [2021-08-06 15:27:37,057 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:37,057 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076993646] [2021-08-06 15:27:37,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:37,057 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:37,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:37,201 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:37,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:37,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076993646] [2021-08-06 15:27:37,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076993646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:37,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531379140] [2021-08-06 15:27:37,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:27:37,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:37,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:37,202 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) [2021-08-06 15:27:37,203 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-06 15:27:38,179 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:27:38,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:38,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:27:38,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:38,630 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:27:38,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 33 [2021-08-06 15:27:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:38,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531379140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:38,696 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:38,696 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:27:38,696 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927701816] [2021-08-06 15:27:38,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:27:38,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:38,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:27:38,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:27:38,696 INFO L87 Difference]: Start difference. First operand 5827 states and 16828 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:38,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:38,886 INFO L93 Difference]: Finished difference Result 7509 states and 21608 transitions. [2021-08-06 15:27:38,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:27:38,886 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:27:38,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:38,897 INFO L225 Difference]: With dead ends: 7509 [2021-08-06 15:27:38,897 INFO L226 Difference]: Without dead ends: 7419 [2021-08-06 15:27:38,897 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 185.9ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:27:38,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7419 states. [2021-08-06 15:27:38,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7419 to 7227. [2021-08-06 15:27:38,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7227 states, 7226 states have (on average 2.9022972598948242) internal successors, (20972), 7226 states have internal predecessors, (20972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:39,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7227 states to 7227 states and 20972 transitions. [2021-08-06 15:27:39,001 INFO L78 Accepts]: Start accepts. Automaton has 7227 states and 20972 transitions. Word has length 34 [2021-08-06 15:27:39,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:39,001 INFO L470 AbstractCegarLoop]: Abstraction has 7227 states and 20972 transitions. [2021-08-06 15:27:39,001 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:39,001 INFO L276 IsEmpty]: Start isEmpty. Operand 7227 states and 20972 transitions. [2021-08-06 15:27:39,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:27:39,010 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:39,010 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:39,029 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:39,221 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,SelfDestructingSolverStorable63 [2021-08-06 15:27:39,221 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:39,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:39,222 INFO L82 PathProgramCache]: Analyzing trace with hash -421221348, now seen corresponding path program 47 times [2021-08-06 15:27:39,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:39,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131407262] [2021-08-06 15:27:39,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:39,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:39,342 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:39,342 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:39,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131407262] [2021-08-06 15:27:39,342 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131407262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:39,342 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1556975412] [2021-08-06 15:27:39,342 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:27:39,342 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:39,342 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:39,343 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) [2021-08-06 15:27:39,345 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-06 15:27:40,359 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:27:40,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:40,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:27:40,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:40,785 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:27:40,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:27:40,836 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:40,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1556975412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:40,837 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:40,837 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-08-06 15:27:40,837 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144678030] [2021-08-06 15:27:40,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:27:40,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:40,837 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:27:40,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:27:40,837 INFO L87 Difference]: Start difference. First operand 7227 states and 20972 transitions. Second operand has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:41,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:41,019 INFO L93 Difference]: Finished difference Result 7681 states and 22109 transitions. [2021-08-06 15:27:41,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:27:41,019 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:27:41,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:41,032 INFO L225 Difference]: With dead ends: 7681 [2021-08-06 15:27:41,032 INFO L226 Difference]: Without dead ends: 7573 [2021-08-06 15:27:41,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 152.8ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:27:41,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7573 states. [2021-08-06 15:27:41,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7573 to 7191. [2021-08-06 15:27:41,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7191 states, 7190 states have (on average 2.9009735744089014) internal successors, (20858), 7190 states have internal predecessors, (20858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:41,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7191 states to 7191 states and 20858 transitions. [2021-08-06 15:27:41,134 INFO L78 Accepts]: Start accepts. Automaton has 7191 states and 20858 transitions. Word has length 34 [2021-08-06 15:27:41,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:41,134 INFO L470 AbstractCegarLoop]: Abstraction has 7191 states and 20858 transitions. [2021-08-06 15:27:41,134 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.235294117647059) internal successors, (55), 16 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:41,134 INFO L276 IsEmpty]: Start isEmpty. Operand 7191 states and 20858 transitions. [2021-08-06 15:27:41,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:27:41,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:41,144 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:41,163 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:41,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:41,357 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:41,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:41,357 INFO L82 PathProgramCache]: Analyzing trace with hash -25426190, now seen corresponding path program 48 times [2021-08-06 15:27:41,357 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:41,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612760105] [2021-08-06 15:27:41,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:41,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:41,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:41,481 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:41,481 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:41,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612760105] [2021-08-06 15:27:41,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612760105] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:41,481 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166525517] [2021-08-06 15:27:41,481 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:27:41,481 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:41,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:41,482 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) [2021-08-06 15:27:41,483 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-06 15:27:42,541 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:27:42,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:42,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:27:42,542 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:42,987 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:27:42,987 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:27:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:43,026 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166525517] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:43,026 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:43,026 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-08-06 15:27:43,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185557757] [2021-08-06 15:27:43,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:27:43,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:43,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:27:43,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:27:43,027 INFO L87 Difference]: Start difference. First operand 7191 states and 20858 transitions. Second operand has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:43,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:43,231 INFO L93 Difference]: Finished difference Result 8299 states and 23923 transitions. [2021-08-06 15:27:43,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:27:43,231 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:27:43,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:43,245 INFO L225 Difference]: With dead ends: 8299 [2021-08-06 15:27:43,245 INFO L226 Difference]: Without dead ends: 8182 [2021-08-06 15:27:43,246 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 168.0ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:27:43,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8182 states. [2021-08-06 15:27:43,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8182 to 7911. [2021-08-06 15:27:43,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7911 states, 7910 states have (on average 2.9107458912768647) internal successors, (23024), 7910 states have internal predecessors, (23024), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:43,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7911 states to 7911 states and 23024 transitions. [2021-08-06 15:27:43,384 INFO L78 Accepts]: Start accepts. Automaton has 7911 states and 23024 transitions. Word has length 34 [2021-08-06 15:27:43,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:43,384 INFO L470 AbstractCegarLoop]: Abstraction has 7911 states and 23024 transitions. [2021-08-06 15:27:43,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0555555555555554) internal successors, (55), 17 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:43,384 INFO L276 IsEmpty]: Start isEmpty. Operand 7911 states and 23024 transitions. [2021-08-06 15:27:43,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:27:43,395 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:43,395 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:43,414 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:43,595 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,SelfDestructingSolverStorable65 [2021-08-06 15:27:43,595 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:43,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:43,596 INFO L82 PathProgramCache]: Analyzing trace with hash 1172822266, now seen corresponding path program 49 times [2021-08-06 15:27:43,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:43,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075008726] [2021-08-06 15:27:43,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:43,596 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:43,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:43,722 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:27:43,722 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:43,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075008726] [2021-08-06 15:27:43,722 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075008726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:43,722 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045202881] [2021-08-06 15:27:43,722 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:27:43,722 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:43,722 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:43,724 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) [2021-08-06 15:27:43,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-06 15:27:44,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:44,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:27:44,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:45,263 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:27:45,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:27:45,302 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:45,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2045202881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:45,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:45,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-08-06 15:27:45,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139059684] [2021-08-06 15:27:45,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:27:45,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:45,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:27:45,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=257, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:27:45,303 INFO L87 Difference]: Start difference. First operand 7911 states and 23024 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:45,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:45,514 INFO L93 Difference]: Finished difference Result 8695 states and 25141 transitions. [2021-08-06 15:27:45,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:27:45,514 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:27:45,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:45,530 INFO L225 Difference]: With dead ends: 8695 [2021-08-06 15:27:45,530 INFO L226 Difference]: Without dead ends: 8578 [2021-08-06 15:27:45,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 179.0ms TimeCoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:27:45,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8578 states. [2021-08-06 15:27:45,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8578 to 8323. [2021-08-06 15:27:45,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8323 states, 8322 states have (on average 2.918048546022591) internal successors, (24284), 8322 states have internal predecessors, (24284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:45,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8323 states to 8323 states and 24284 transitions. [2021-08-06 15:27:45,657 INFO L78 Accepts]: Start accepts. Automaton has 8323 states and 24284 transitions. Word has length 34 [2021-08-06 15:27:45,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:45,657 INFO L470 AbstractCegarLoop]: Abstraction has 8323 states and 24284 transitions. [2021-08-06 15:27:45,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:45,658 INFO L276 IsEmpty]: Start isEmpty. Operand 8323 states and 24284 transitions. [2021-08-06 15:27:45,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:27:45,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:45,668 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:45,687 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:45,868 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,SelfDestructingSolverStorable66 [2021-08-06 15:27:45,869 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:45,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:45,869 INFO L82 PathProgramCache]: Analyzing trace with hash -2122709830, now seen corresponding path program 50 times [2021-08-06 15:27:45,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:45,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974255000] [2021-08-06 15:27:45,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:45,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:45,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:46,012 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:46,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:46,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974255000] [2021-08-06 15:27:46,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974255000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:46,013 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602661209] [2021-08-06 15:27:46,013 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:27:46,013 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:46,013 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:46,013 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) [2021-08-06 15:27:46,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-06 15:27:47,151 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:27:47,151 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:47,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:27:47,152 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:47,603 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:27:47,603 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:27:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:47,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602661209] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:47,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:47,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:27:47,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570374646] [2021-08-06 15:27:47,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:27:47,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:47,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:27:47,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:27:47,645 INFO L87 Difference]: Start difference. First operand 8323 states and 24284 transitions. Second operand has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:47,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:47,892 INFO L93 Difference]: Finished difference Result 8641 states and 24990 transitions. [2021-08-06 15:27:47,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:27:47,892 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:27:47,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:47,904 INFO L225 Difference]: With dead ends: 8641 [2021-08-06 15:27:47,904 INFO L226 Difference]: Without dead ends: 8565 [2021-08-06 15:27:47,904 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 185.5ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:27:47,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8565 states. [2021-08-06 15:27:47,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8565 to 8317. [2021-08-06 15:27:47,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8317 states, 8316 states have (on average 2.9183501683501682) internal successors, (24269), 8316 states have internal predecessors, (24269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:48,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8317 states to 8317 states and 24269 transitions. [2021-08-06 15:27:48,006 INFO L78 Accepts]: Start accepts. Automaton has 8317 states and 24269 transitions. Word has length 34 [2021-08-06 15:27:48,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:48,007 INFO L470 AbstractCegarLoop]: Abstraction has 8317 states and 24269 transitions. [2021-08-06 15:27:48,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8947368421052633) internal successors, (55), 18 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:48,007 INFO L276 IsEmpty]: Start isEmpty. Operand 8317 states and 24269 transitions. [2021-08-06 15:27:48,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:27:48,017 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:48,017 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:48,036 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-06 15:27:48,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:48,217 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:48,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:48,218 INFO L82 PathProgramCache]: Analyzing trace with hash -65040082, now seen corresponding path program 51 times [2021-08-06 15:27:48,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:48,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993614468] [2021-08-06 15:27:48,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:48,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:48,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:48,377 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:48,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:48,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993614468] [2021-08-06 15:27:48,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [993614468] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:48,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454051141] [2021-08-06 15:27:48,378 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:27:48,378 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:48,378 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:48,378 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) [2021-08-06 15:27:48,379 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-06 15:27:49,542 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:27:49,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:49,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:27:49,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:49,936 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 15:27:49,936 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 37 [2021-08-06 15:27:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:49,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454051141] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:49,970 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:49,970 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-06 15:27:49,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295912549] [2021-08-06 15:27:49,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 15:27:49,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:49,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 15:27:49,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-06 15:27:49,970 INFO L87 Difference]: Start difference. First operand 8317 states and 24269 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:50,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:50,163 INFO L93 Difference]: Finished difference Result 12332 states and 36170 transitions. [2021-08-06 15:27:50,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:27:50,163 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:27:50,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:50,185 INFO L225 Difference]: With dead ends: 12332 [2021-08-06 15:27:50,185 INFO L226 Difference]: Without dead ends: 12295 [2021-08-06 15:27:50,185 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 154.6ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:27:50,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12295 states. [2021-08-06 15:27:50,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12295 to 8325. [2021-08-06 15:27:50,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8325 states, 8324 states have (on average 2.917948101874099) internal successors, (24289), 8324 states have internal predecessors, (24289), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:50,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8325 states to 8325 states and 24289 transitions. [2021-08-06 15:27:50,349 INFO L78 Accepts]: Start accepts. Automaton has 8325 states and 24289 transitions. Word has length 34 [2021-08-06 15:27:50,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:50,349 INFO L470 AbstractCegarLoop]: Abstraction has 8325 states and 24289 transitions. [2021-08-06 15:27:50,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:50,349 INFO L276 IsEmpty]: Start isEmpty. Operand 8325 states and 24289 transitions. [2021-08-06 15:27:50,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:27:50,364 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:50,364 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:50,383 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:50,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:50,564 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:50,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:50,564 INFO L82 PathProgramCache]: Analyzing trace with hash -1777129678, now seen corresponding path program 52 times [2021-08-06 15:27:50,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:50,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294063798] [2021-08-06 15:27:50,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:50,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:50,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:50,707 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:50,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:50,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294063798] [2021-08-06 15:27:50,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294063798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:50,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069559155] [2021-08-06 15:27:50,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:27:50,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:50,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:50,708 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) [2021-08-06 15:27:50,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-06 15:27:51,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:27:51,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:51,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:27:51,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:52,380 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:27:52,380 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:27:52,441 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:52,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069559155] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:52,441 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:52,441 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 15:27:52,441 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376499822] [2021-08-06 15:27:52,441 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:27:52,441 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:52,442 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:27:52,442 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=230, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:27:52,442 INFO L87 Difference]: Start difference. First operand 8325 states and 24289 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:52,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:52,646 INFO L93 Difference]: Finished difference Result 12300 states and 36126 transitions. [2021-08-06 15:27:52,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 15:27:52,646 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:27:52,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:52,694 INFO L225 Difference]: With dead ends: 12300 [2021-08-06 15:27:52,694 INFO L226 Difference]: Without dead ends: 12263 [2021-08-06 15:27:52,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 163.8ms TimeCoverageRelationStatistics Valid=47, Invalid=259, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:27:52,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12263 states. [2021-08-06 15:27:52,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12263 to 8347. [2021-08-06 15:27:52,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8347 states, 8346 states have (on average 2.9180445722501798) internal successors, (24354), 8346 states have internal predecessors, (24354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:52,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8347 states to 8347 states and 24354 transitions. [2021-08-06 15:27:52,820 INFO L78 Accepts]: Start accepts. Automaton has 8347 states and 24354 transitions. Word has length 34 [2021-08-06 15:27:52,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:52,820 INFO L470 AbstractCegarLoop]: Abstraction has 8347 states and 24354 transitions. [2021-08-06 15:27:52,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:52,820 INFO L276 IsEmpty]: Start isEmpty. Operand 8347 states and 24354 transitions. [2021-08-06 15:27:52,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:27:52,832 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:52,832 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:52,851 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-06 15:27:53,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:53,034 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:53,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:53,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1088627474, now seen corresponding path program 53 times [2021-08-06 15:27:53,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:53,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [102975632] [2021-08-06 15:27:53,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:53,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:53,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:53,167 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:53,167 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:53,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [102975632] [2021-08-06 15:27:53,167 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [102975632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:53,167 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942208944] [2021-08-06 15:27:53,167 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:27:53,167 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:53,167 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:53,168 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) [2021-08-06 15:27:53,169 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-06 15:27:54,424 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:27:54,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:54,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:27:54,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:54,803 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:27:54,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:27:54,837 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:54,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [942208944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:54,838 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:54,838 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 15:27:54,838 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361236722] [2021-08-06 15:27:54,838 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:27:54,838 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:54,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:27:54,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=227, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:27:54,839 INFO L87 Difference]: Start difference. First operand 8347 states and 24354 transitions. Second operand has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:55,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:55,065 INFO L93 Difference]: Finished difference Result 12845 states and 37674 transitions. [2021-08-06 15:27:55,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:27:55,066 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:27:55,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:55,088 INFO L225 Difference]: With dead ends: 12845 [2021-08-06 15:27:55,089 INFO L226 Difference]: Without dead ends: 12771 [2021-08-06 15:27:55,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 156.5ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:27:55,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12771 states. [2021-08-06 15:27:55,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12771 to 8781. [2021-08-06 15:27:55,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8781 states, 8780 states have (on average 2.9197038724373576) internal successors, (25635), 8780 states have internal predecessors, (25635), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:55,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8781 states to 8781 states and 25635 transitions. [2021-08-06 15:27:55,232 INFO L78 Accepts]: Start accepts. Automaton has 8781 states and 25635 transitions. Word has length 34 [2021-08-06 15:27:55,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:55,232 INFO L470 AbstractCegarLoop]: Abstraction has 8781 states and 25635 transitions. [2021-08-06 15:27:55,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.823529411764706) internal successors, (48), 16 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:55,232 INFO L276 IsEmpty]: Start isEmpty. Operand 8781 states and 25635 transitions. [2021-08-06 15:27:55,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:27:55,243 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:55,243 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:55,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-06 15:27:55,443 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:55,443 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:55,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:55,444 INFO L82 PathProgramCache]: Analyzing trace with hash 1451336562, now seen corresponding path program 54 times [2021-08-06 15:27:55,444 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:55,444 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516772214] [2021-08-06 15:27:55,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:55,444 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:55,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:55,571 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:55,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:55,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516772214] [2021-08-06 15:27:55,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516772214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:55,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119201149] [2021-08-06 15:27:55,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:27:55,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:55,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:55,572 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) [2021-08-06 15:27:55,573 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-06 15:27:56,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:27:56,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:27:56,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 15:27:56,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:27:57,126 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:27:57,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 48 treesize of output 26 [2021-08-06 15:27:57,159 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:57,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119201149] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:57,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:27:57,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 21 [2021-08-06 15:27:57,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407482457] [2021-08-06 15:27:57,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:27:57,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:27:57,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:27:57,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=369, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:27:57,160 INFO L87 Difference]: Start difference. First operand 8781 states and 25635 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:57,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:27:57,774 INFO L93 Difference]: Finished difference Result 14288 states and 41566 transitions. [2021-08-06 15:27:57,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:27:57,774 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:27:57,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:27:57,800 INFO L225 Difference]: With dead ends: 14288 [2021-08-06 15:27:57,800 INFO L226 Difference]: Without dead ends: 14180 [2021-08-06 15:27:57,800 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 438.2ms TimeCoverageRelationStatistics Valid=155, Invalid=1177, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 15:27:57,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14180 states. [2021-08-06 15:27:57,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14180 to 9669. [2021-08-06 15:27:57,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9669 states, 9668 states have (on average 2.929354571783202) internal successors, (28321), 9668 states have internal predecessors, (28321), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:58,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9669 states to 9669 states and 28321 transitions. [2021-08-06 15:27:58,012 INFO L78 Accepts]: Start accepts. Automaton has 9669 states and 28321 transitions. Word has length 34 [2021-08-06 15:27:58,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:27:58,012 INFO L470 AbstractCegarLoop]: Abstraction has 9669 states and 28321 transitions. [2021-08-06 15:27:58,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:27:58,012 INFO L276 IsEmpty]: Start isEmpty. Operand 9669 states and 28321 transitions. [2021-08-06 15:27:58,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:27:58,025 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:27:58,025 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:27:58,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-06 15:27:58,225 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,SelfDestructingSolverStorable71 [2021-08-06 15:27:58,226 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:27:58,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:27:58,226 INFO L82 PathProgramCache]: Analyzing trace with hash 1338048164, now seen corresponding path program 55 times [2021-08-06 15:27:58,226 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:27:58,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894961509] [2021-08-06 15:27:58,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:27:58,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:27:58,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:58,379 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:27:58,379 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:27:58,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894961509] [2021-08-06 15:27:58,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [894961509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:27:58,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1983667735] [2021-08-06 15:27:58,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:27:58,380 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:27:58,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:27:58,380 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) [2021-08-06 15:27:58,391 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-06 15:27:59,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:27:59,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:27:59,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:00,129 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:28:00,130 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:28:00,163 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:00,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1983667735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:00,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:00,164 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:28:00,164 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393473835] [2021-08-06 15:28:00,164 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:28:00,164 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:00,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:28:00,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:28:00,165 INFO L87 Difference]: Start difference. First operand 9669 states and 28321 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:00,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:00,414 INFO L93 Difference]: Finished difference Result 10725 states and 31154 transitions. [2021-08-06 15:28:00,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:28:00,414 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:28:00,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:00,437 INFO L225 Difference]: With dead ends: 10725 [2021-08-06 15:28:00,437 INFO L226 Difference]: Without dead ends: 10651 [2021-08-06 15:28:00,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 177.2ms TimeCoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:28:00,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10651 states. [2021-08-06 15:28:00,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10651 to 10003. [2021-08-06 15:28:00,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10003 states, 10002 states have (on average 2.931613677264547) internal successors, (29322), 10002 states have internal predecessors, (29322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:00,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10003 states to 10003 states and 29322 transitions. [2021-08-06 15:28:00,617 INFO L78 Accepts]: Start accepts. Automaton has 10003 states and 29322 transitions. Word has length 34 [2021-08-06 15:28:00,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:00,617 INFO L470 AbstractCegarLoop]: Abstraction has 10003 states and 29322 transitions. [2021-08-06 15:28:00,617 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:00,618 INFO L276 IsEmpty]: Start isEmpty. Operand 10003 states and 29322 transitions. [2021-08-06 15:28:00,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:28:00,631 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:00,631 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:00,651 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-06 15:28:00,832 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,SelfDestructingSolverStorable72 [2021-08-06 15:28:00,833 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:00,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:00,833 INFO L82 PathProgramCache]: Analyzing trace with hash -1708940652, now seen corresponding path program 56 times [2021-08-06 15:28:00,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:00,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119691851] [2021-08-06 15:28:00,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:00,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:00,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:00,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:00,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119691851] [2021-08-06 15:28:00,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119691851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:00,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868610509] [2021-08-06 15:28:00,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:28:00,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:00,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:00,963 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) [2021-08-06 15:28:00,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-06 15:28:02,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:28:02,305 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:02,306 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:28:02,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:02,716 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:28:02,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:28:02,756 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:02,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868610509] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:02,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:02,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-08-06 15:28:02,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [371337080] [2021-08-06 15:28:02,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:28:02,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:02,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:28:02,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:28:02,757 INFO L87 Difference]: Start difference. First operand 10003 states and 29322 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:03,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:03,005 INFO L93 Difference]: Finished difference Result 10805 states and 31382 transitions. [2021-08-06 15:28:03,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:28:03,005 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:28:03,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:03,024 INFO L225 Difference]: With dead ends: 10805 [2021-08-06 15:28:03,024 INFO L226 Difference]: Without dead ends: 10731 [2021-08-06 15:28:03,025 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 160.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:28:03,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10731 states. [2021-08-06 15:28:03,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10731 to 9581. [2021-08-06 15:28:03,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9581 states, 9580 states have (on average 2.9305845511482254) internal successors, (28075), 9580 states have internal predecessors, (28075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:03,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9581 states to 9581 states and 28075 transitions. [2021-08-06 15:28:03,202 INFO L78 Accepts]: Start accepts. Automaton has 9581 states and 28075 transitions. Word has length 34 [2021-08-06 15:28:03,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:03,202 INFO L470 AbstractCegarLoop]: Abstraction has 9581 states and 28075 transitions. [2021-08-06 15:28:03,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:03,202 INFO L276 IsEmpty]: Start isEmpty. Operand 9581 states and 28075 transitions. [2021-08-06 15:28:03,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:28:03,214 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:03,214 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:03,234 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:03,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:03,415 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:03,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:03,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1416289990, now seen corresponding path program 57 times [2021-08-06 15:28:03,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:03,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153337917] [2021-08-06 15:28:03,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:03,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:03,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:03,543 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:03,543 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:03,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153337917] [2021-08-06 15:28:03,543 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153337917] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:03,543 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2118471285] [2021-08-06 15:28:03,543 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:28:03,543 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:03,543 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:03,544 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) [2021-08-06 15:28:03,544 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-06 15:28:04,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:28:04,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:04,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:28:04,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:05,333 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:28:05,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:28:05,409 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:05,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2118471285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:05,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:05,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-08-06 15:28:05,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885723860] [2021-08-06 15:28:05,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:28:05,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:05,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:28:05,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:28:05,411 INFO L87 Difference]: Start difference. First operand 9581 states and 28075 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:05,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:05,714 INFO L93 Difference]: Finished difference Result 11489 states and 33477 transitions. [2021-08-06 15:28:05,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:28:05,714 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:28:05,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:05,735 INFO L225 Difference]: With dead ends: 11489 [2021-08-06 15:28:05,735 INFO L226 Difference]: Without dead ends: 11399 [2021-08-06 15:28:05,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 191.1ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:28:05,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11399 states. [2021-08-06 15:28:05,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11399 to 10345. [2021-08-06 15:28:05,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10345 states, 10344 states have (on average 2.93899845320959) internal successors, (30401), 10344 states have internal predecessors, (30401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:05,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10345 states to 10345 states and 30401 transitions. [2021-08-06 15:28:05,894 INFO L78 Accepts]: Start accepts. Automaton has 10345 states and 30401 transitions. Word has length 34 [2021-08-06 15:28:05,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:05,894 INFO L470 AbstractCegarLoop]: Abstraction has 10345 states and 30401 transitions. [2021-08-06 15:28:05,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:05,894 INFO L276 IsEmpty]: Start isEmpty. Operand 10345 states and 30401 transitions. [2021-08-06 15:28:05,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:28:05,908 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:05,908 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:05,928 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:06,108 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:06,109 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:06,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:06,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1535373002, now seen corresponding path program 58 times [2021-08-06 15:28:06,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:06,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846802457] [2021-08-06 15:28:06,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:06,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:06,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:28:06,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:06,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846802457] [2021-08-06 15:28:06,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846802457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:06,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153778263] [2021-08-06 15:28:06,243 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:28:06,243 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:06,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:06,244 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) [2021-08-06 15:28:06,244 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-06 15:28:07,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:28:07,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:07,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:28:07,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:08,083 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:28:08,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 33 [2021-08-06 15:28:08,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:08,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [153778263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:08,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:08,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 16 [2021-08-06 15:28:08,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629307771] [2021-08-06 15:28:08,126 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:28:08,126 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:08,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:28:08,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:28:08,126 INFO L87 Difference]: Start difference. First operand 10345 states and 30401 transitions. Second operand has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:08,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:08,389 INFO L93 Difference]: Finished difference Result 11481 states and 33447 transitions. [2021-08-06 15:28:08,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:28:08,389 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:28:08,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:08,409 INFO L225 Difference]: With dead ends: 11481 [2021-08-06 15:28:08,409 INFO L226 Difference]: Without dead ends: 11365 [2021-08-06 15:28:08,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 181.0ms TimeCoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:28:08,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11365 states. [2021-08-06 15:28:08,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11365 to 10339. [2021-08-06 15:28:08,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10339 states, 10338 states have (on average 2.9367382472431807) internal successors, (30360), 10338 states have internal predecessors, (30360), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:08,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10339 states to 10339 states and 30360 transitions. [2021-08-06 15:28:08,567 INFO L78 Accepts]: Start accepts. Automaton has 10339 states and 30360 transitions. Word has length 34 [2021-08-06 15:28:08,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:08,567 INFO L470 AbstractCegarLoop]: Abstraction has 10339 states and 30360 transitions. [2021-08-06 15:28:08,567 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.9411764705882355) internal successors, (50), 16 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:08,567 INFO L276 IsEmpty]: Start isEmpty. Operand 10339 states and 30360 transitions. [2021-08-06 15:28:08,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:28:08,580 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:08,580 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:08,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:08,799 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,SelfDestructingSolverStorable75 [2021-08-06 15:28:08,800 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:08,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:08,800 INFO L82 PathProgramCache]: Analyzing trace with hash -1391085420, now seen corresponding path program 59 times [2021-08-06 15:28:08,800 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:08,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033815605] [2021-08-06 15:28:08,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:08,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:08,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:08,935 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:08,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:08,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033815605] [2021-08-06 15:28:08,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033815605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:08,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314183654] [2021-08-06 15:28:08,935 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:28:08,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:08,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:08,936 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) [2021-08-06 15:28:08,937 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-06 15:28:10,364 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:28:10,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:10,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:28:10,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:10,775 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:28:10,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 33 [2021-08-06 15:28:10,808 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:10,809 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314183654] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:10,809 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:10,809 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 17 [2021-08-06 15:28:10,809 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900832718] [2021-08-06 15:28:10,809 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:28:10,809 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:10,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:28:10,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:28:10,809 INFO L87 Difference]: Start difference. First operand 10339 states and 30360 transitions. Second operand has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:11,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:11,016 INFO L93 Difference]: Finished difference Result 11183 states and 32491 transitions. [2021-08-06 15:28:11,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:28:11,016 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:28:11,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:11,036 INFO L225 Difference]: With dead ends: 11183 [2021-08-06 15:28:11,036 INFO L226 Difference]: Without dead ends: 11066 [2021-08-06 15:28:11,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 189.3ms TimeCoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:28:11,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11066 states. [2021-08-06 15:28:11,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11066 to 9849. [2021-08-06 15:28:11,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9849 states, 9848 states have (on average 2.933489033306255) internal successors, (28889), 9848 states have internal predecessors, (28889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:11,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9849 states to 9849 states and 28889 transitions. [2021-08-06 15:28:11,199 INFO L78 Accepts]: Start accepts. Automaton has 9849 states and 28889 transitions. Word has length 34 [2021-08-06 15:28:11,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:11,200 INFO L470 AbstractCegarLoop]: Abstraction has 9849 states and 28889 transitions. [2021-08-06 15:28:11,200 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.8333333333333335) internal successors, (51), 17 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:11,200 INFO L276 IsEmpty]: Start isEmpty. Operand 9849 states and 28889 transitions. [2021-08-06 15:28:11,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:28:11,213 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:11,213 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:11,233 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-06 15:28:11,413 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,SelfDestructingSolverStorable76 [2021-08-06 15:28:11,414 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:11,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:11,414 INFO L82 PathProgramCache]: Analyzing trace with hash -2062395372, now seen corresponding path program 60 times [2021-08-06 15:28:11,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:11,414 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586644604] [2021-08-06 15:28:11,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:11,414 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:11,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:11,586 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:11,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:11,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586644604] [2021-08-06 15:28:11,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586644604] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:11,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882718116] [2021-08-06 15:28:11,586 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:28:11,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:11,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:11,587 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) [2021-08-06 15:28:11,587 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-06 15:28:13,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:28:13,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:13,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:28:13,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:13,469 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:28:13,469 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:28:13,515 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:13,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1882718116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:13,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:13,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:28:13,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1568425291] [2021-08-06 15:28:13,515 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:28:13,515 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:13,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:28:13,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:28:13,516 INFO L87 Difference]: Start difference. First operand 9849 states and 28889 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:13,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:13,747 INFO L93 Difference]: Finished difference Result 11201 states and 32696 transitions. [2021-08-06 15:28:13,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:28:13,747 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:28:13,747 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:13,766 INFO L225 Difference]: With dead ends: 11201 [2021-08-06 15:28:13,766 INFO L226 Difference]: Without dead ends: 11107 [2021-08-06 15:28:13,766 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 188.9ms TimeCoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:28:13,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11107 states. [2021-08-06 15:28:13,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11107 to 10839. [2021-08-06 15:28:13,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10839 states, 10838 states have (on average 2.9409485144860676) internal successors, (31874), 10838 states have internal predecessors, (31874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:13,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10839 states to 10839 states and 31874 transitions. [2021-08-06 15:28:13,937 INFO L78 Accepts]: Start accepts. Automaton has 10839 states and 31874 transitions. Word has length 34 [2021-08-06 15:28:13,938 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:13,938 INFO L470 AbstractCegarLoop]: Abstraction has 10839 states and 31874 transitions. [2021-08-06 15:28:13,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:13,938 INFO L276 IsEmpty]: Start isEmpty. Operand 10839 states and 31874 transitions. [2021-08-06 15:28:13,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:28:13,951 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:13,952 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:13,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-06 15:28:14,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:14,152 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:14,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:14,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1791855278, now seen corresponding path program 61 times [2021-08-06 15:28:14,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:14,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273114568] [2021-08-06 15:28:14,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:14,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:14,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:14,274 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:14,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:14,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273114568] [2021-08-06 15:28:14,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273114568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:14,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486298986] [2021-08-06 15:28:14,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:28:14,274 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:14,274 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:14,275 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) [2021-08-06 15:28:14,293 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-06 15:28:15,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:15,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:28:15,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:16,333 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:28:16,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:28:16,380 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:16,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486298986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:16,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:16,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-08-06 15:28:16,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229659343] [2021-08-06 15:28:16,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:28:16,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:16,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:28:16,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:28:16,381 INFO L87 Difference]: Start difference. First operand 10839 states and 31874 transitions. Second operand has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:16,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:16,601 INFO L93 Difference]: Finished difference Result 11645 states and 34056 transitions. [2021-08-06 15:28:16,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:28:16,601 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:28:16,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:16,622 INFO L225 Difference]: With dead ends: 11645 [2021-08-06 15:28:16,623 INFO L226 Difference]: Without dead ends: 11537 [2021-08-06 15:28:16,623 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 182.2ms TimeCoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:28:16,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11537 states. [2021-08-06 15:28:16,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11537 to 10493. [2021-08-06 15:28:16,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10493 states, 10492 states have (on average 2.9400495615707207) internal successors, (30847), 10492 states have internal predecessors, (30847), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:16,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10493 states to 10493 states and 30847 transitions. [2021-08-06 15:28:16,798 INFO L78 Accepts]: Start accepts. Automaton has 10493 states and 30847 transitions. Word has length 34 [2021-08-06 15:28:16,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:16,798 INFO L470 AbstractCegarLoop]: Abstraction has 10493 states and 30847 transitions. [2021-08-06 15:28:16,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:16,799 INFO L276 IsEmpty]: Start isEmpty. Operand 10493 states and 30847 transitions. [2021-08-06 15:28:16,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:28:16,812 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:16,812 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:16,832 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-08-06 15:28:17,012 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,SelfDestructingSolverStorable78 [2021-08-06 15:28:17,012 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:17,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:17,013 INFO L82 PathProgramCache]: Analyzing trace with hash -764552876, now seen corresponding path program 62 times [2021-08-06 15:28:17,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:17,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [401514683] [2021-08-06 15:28:17,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:17,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:17,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:17,129 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:17,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [401514683] [2021-08-06 15:28:17,129 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [401514683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:17,129 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842142084] [2021-08-06 15:28:17,129 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:28:17,129 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:17,129 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:17,130 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) [2021-08-06 15:28:17,130 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-06 15:28:18,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:28:18,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:18,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:28:18,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:19,082 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:28:19,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:28:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:19,126 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1842142084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:19,126 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:19,126 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-08-06 15:28:19,126 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75285449] [2021-08-06 15:28:19,127 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:28:19,127 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:19,127 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:28:19,127 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:28:19,127 INFO L87 Difference]: Start difference. First operand 10493 states and 30847 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:19,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:19,355 INFO L93 Difference]: Finished difference Result 12117 states and 35549 transitions. [2021-08-06 15:28:19,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:28:19,355 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:28:19,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:19,377 INFO L225 Difference]: With dead ends: 12117 [2021-08-06 15:28:19,377 INFO L226 Difference]: Without dead ends: 12035 [2021-08-06 15:28:19,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 155.4ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:28:19,386 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12035 states. [2021-08-06 15:28:19,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12035 to 11671. [2021-08-06 15:28:19,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11671 states, 11670 states have (on average 2.948928877463582) internal successors, (34414), 11670 states have internal predecessors, (34414), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:19,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11671 states to 11671 states and 34414 transitions. [2021-08-06 15:28:19,551 INFO L78 Accepts]: Start accepts. Automaton has 11671 states and 34414 transitions. Word has length 34 [2021-08-06 15:28:19,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:19,551 INFO L470 AbstractCegarLoop]: Abstraction has 11671 states and 34414 transitions. [2021-08-06 15:28:19,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:19,551 INFO L276 IsEmpty]: Start isEmpty. Operand 11671 states and 34414 transitions. [2021-08-06 15:28:19,566 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:28:19,566 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:19,566 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:19,586 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:19,766 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,SelfDestructingSolverStorable79 [2021-08-06 15:28:19,767 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:19,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:19,767 INFO L82 PathProgramCache]: Analyzing trace with hash -883635888, now seen corresponding path program 63 times [2021-08-06 15:28:19,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:19,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813678751] [2021-08-06 15:28:19,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:19,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:19,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:19,912 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:28:19,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:19,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813678751] [2021-08-06 15:28:19,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813678751] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:19,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581657710] [2021-08-06 15:28:19,912 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:28:19,912 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:19,912 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:19,913 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) [2021-08-06 15:28:19,913 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-06 15:28:21,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 15:28:21,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:21,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:28:21,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:21,904 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:28:21,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 33 [2021-08-06 15:28:21,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:21,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581657710] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:21,939 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:21,939 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 11] total 16 [2021-08-06 15:28:21,939 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513789108] [2021-08-06 15:28:21,939 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 15:28:21,939 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:21,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 15:28:21,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2021-08-06 15:28:21,939 INFO L87 Difference]: Start difference. First operand 11671 states and 34414 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:22,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:22,160 INFO L93 Difference]: Finished difference Result 12114 states and 35537 transitions. [2021-08-06 15:28:22,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:28:22,160 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:28:22,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:22,180 INFO L225 Difference]: With dead ends: 12114 [2021-08-06 15:28:22,180 INFO L226 Difference]: Without dead ends: 12002 [2021-08-06 15:28:22,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 160.5ms TimeCoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:28:22,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12002 states. [2021-08-06 15:28:22,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12002 to 11231. [2021-08-06 15:28:22,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11231 states, 11230 states have (on average 2.943900267141585) internal successors, (33060), 11230 states have internal predecessors, (33060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:22,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11231 states to 11231 states and 33060 transitions. [2021-08-06 15:28:22,347 INFO L78 Accepts]: Start accepts. Automaton has 11231 states and 33060 transitions. Word has length 34 [2021-08-06 15:28:22,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:22,347 INFO L470 AbstractCegarLoop]: Abstraction has 11231 states and 33060 transitions. [2021-08-06 15:28:22,347 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 16 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:22,347 INFO L276 IsEmpty]: Start isEmpty. Operand 11231 states and 33060 transitions. [2021-08-06 15:28:22,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:28:22,361 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:22,361 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:22,382 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-06 15:28:22,564 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:22,565 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:22,565 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:22,565 INFO L82 PathProgramCache]: Analyzing trace with hash -739348306, now seen corresponding path program 64 times [2021-08-06 15:28:22,565 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:22,565 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982458308] [2021-08-06 15:28:22,565 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:22,565 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:22,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:22,686 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:28:22,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:22,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982458308] [2021-08-06 15:28:22,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982458308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:22,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294294694] [2021-08-06 15:28:22,686 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:28:22,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:22,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:22,687 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) [2021-08-06 15:28:22,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-06 15:28:24,283 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:28:24,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:24,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:28:24,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:24,702 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:28:24,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 33 [2021-08-06 15:28:24,771 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:24,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294294694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:24,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:24,772 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 17 [2021-08-06 15:28:24,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274135149] [2021-08-06 15:28:24,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 15:28:24,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:24,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 15:28:24,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-08-06 15:28:24,772 INFO L87 Difference]: Start difference. First operand 11231 states and 33060 transitions. Second operand has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:25,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:25,006 INFO L93 Difference]: Finished difference Result 12011 states and 35167 transitions. [2021-08-06 15:28:25,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 15:28:25,008 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:28:25,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:25,029 INFO L225 Difference]: With dead ends: 12011 [2021-08-06 15:28:25,029 INFO L226 Difference]: Without dead ends: 11894 [2021-08-06 15:28:25,029 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 164.7ms TimeCoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:28:25,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11894 states. [2021-08-06 15:28:25,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11894 to 11643. [2021-08-06 15:28:25,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11643 states, 11642 states have (on average 2.9479470881291876) internal successors, (34320), 11642 states have internal predecessors, (34320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:25,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11643 states to 11643 states and 34320 transitions. [2021-08-06 15:28:25,199 INFO L78 Accepts]: Start accepts. Automaton has 11643 states and 34320 transitions. Word has length 34 [2021-08-06 15:28:25,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:25,199 INFO L470 AbstractCegarLoop]: Abstraction has 11643 states and 34320 transitions. [2021-08-06 15:28:25,199 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.9444444444444446) internal successors, (53), 17 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:25,199 INFO L276 IsEmpty]: Start isEmpty. Operand 11643 states and 34320 transitions. [2021-08-06 15:28:25,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-06 15:28:25,214 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:25,214 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:25,234 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Ended with exit code 0 [2021-08-06 15:28:25,414 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,SelfDestructingSolverStorable81 [2021-08-06 15:28:25,415 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:25,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:25,415 INFO L82 PathProgramCache]: Analyzing trace with hash 260086894, now seen corresponding path program 65 times [2021-08-06 15:28:25,415 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:25,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144764282] [2021-08-06 15:28:25,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:25,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:25,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:25,557 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:25,558 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:25,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144764282] [2021-08-06 15:28:25,558 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144764282] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:25,558 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624966990] [2021-08-06 15:28:25,558 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:28:25,558 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:25,558 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:25,559 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) [2021-08-06 15:28:25,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-06 15:28:27,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:28:27,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:27,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-06 15:28:27,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:27,654 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:28:27,654 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 33 [2021-08-06 15:28:27,695 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:27,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624966990] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:27,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:27,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 15:28:27,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129844554] [2021-08-06 15:28:27,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:28:27,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:27,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:28:27,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:28:27,696 INFO L87 Difference]: Start difference. First operand 11643 states and 34320 transitions. Second operand has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:27,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:27,943 INFO L93 Difference]: Finished difference Result 11957 states and 35016 transitions. [2021-08-06 15:28:27,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 15:28:27,944 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-06 15:28:27,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:27,964 INFO L225 Difference]: With dead ends: 11957 [2021-08-06 15:28:27,964 INFO L226 Difference]: Without dead ends: 11881 [2021-08-06 15:28:27,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 187.0ms TimeCoverageRelationStatistics Valid=62, Invalid=358, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:28:27,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11881 states. [2021-08-06 15:28:28,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11881 to 10363. [2021-08-06 15:28:28,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10363 states, 10362 states have (on average 2.945377340281799) internal successors, (30520), 10362 states have internal predecessors, (30520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:28,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10363 states to 10363 states and 30520 transitions. [2021-08-06 15:28:28,148 INFO L78 Accepts]: Start accepts. Automaton has 10363 states and 30520 transitions. Word has length 34 [2021-08-06 15:28:28,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:28,148 INFO L470 AbstractCegarLoop]: Abstraction has 10363 states and 30520 transitions. [2021-08-06 15:28:28,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.8421052631578947) internal successors, (54), 18 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:28,148 INFO L276 IsEmpty]: Start isEmpty. Operand 10363 states and 30520 transitions. [2021-08-06 15:28:28,161 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:28:28,161 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:28,161 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:28,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-08-06 15:28:28,368 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:28,369 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:28,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:28,369 INFO L82 PathProgramCache]: Analyzing trace with hash -172842062, now seen corresponding path program 66 times [2021-08-06 15:28:28,369 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:28,369 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495304519] [2021-08-06 15:28:28,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:28,369 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:28,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:28,439 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:28,440 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:28,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495304519] [2021-08-06 15:28:28,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495304519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:28,440 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220175076] [2021-08-06 15:28:28,440 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:28:28,440 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:28,440 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:28,441 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) [2021-08-06 15:28:28,457 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-06 15:28:30,095 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:28:30,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:30,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:28:30,096 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:30,303 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:30,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220175076] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:30,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:30,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 15:28:30,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038661344] [2021-08-06 15:28:30,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:28:30,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:30,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:28:30,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:28:30,304 INFO L87 Difference]: Start difference. First operand 10363 states and 30520 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-08-06 15:28:30,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:30,543 INFO L93 Difference]: Finished difference Result 14684 states and 43273 transitions. [2021-08-06 15:28:30,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:28:30,543 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 37 [2021-08-06 15:28:30,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:30,570 INFO L225 Difference]: With dead ends: 14684 [2021-08-06 15:28:30,570 INFO L226 Difference]: Without dead ends: 14684 [2021-08-06 15:28:30,570 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 148.6ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:28:30,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14684 states. [2021-08-06 15:28:30,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14684 to 10709. [2021-08-06 15:28:30,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10709 states, 10708 states have (on average 2.941912588718715) internal successors, (31502), 10708 states have internal predecessors, (31502), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:30,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10709 states to 10709 states and 31502 transitions. [2021-08-06 15:28:30,763 INFO L78 Accepts]: Start accepts. Automaton has 10709 states and 31502 transitions. Word has length 37 [2021-08-06 15:28:30,763 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:30,763 INFO L470 AbstractCegarLoop]: Abstraction has 10709 states and 31502 transitions. [2021-08-06 15:28:30,763 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-08-06 15:28:30,763 INFO L276 IsEmpty]: Start isEmpty. Operand 10709 states and 31502 transitions. [2021-08-06 15:28:30,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:28:30,778 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:30,778 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:30,798 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-08-06 15:28:30,978 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:30,978 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:30,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:30,979 INFO L82 PathProgramCache]: Analyzing trace with hash 1321029392, now seen corresponding path program 67 times [2021-08-06 15:28:30,979 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:30,979 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1359342497] [2021-08-06 15:28:30,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:30,979 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:30,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:31,033 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:31,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:31,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1359342497] [2021-08-06 15:28:31,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1359342497] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:31,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159793108] [2021-08-06 15:28:31,034 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:28:31,034 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:31,034 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:31,034 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) [2021-08-06 15:28:31,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-06 15:28:32,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:32,729 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:28:32,730 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:32,921 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:32,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159793108] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:32,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:32,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 15:28:32,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902008289] [2021-08-06 15:28:32,922 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:28:32,922 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:32,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:28:32,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:28:32,922 INFO L87 Difference]: Start difference. First operand 10709 states and 31502 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-08-06 15:28:33,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:33,075 INFO L93 Difference]: Finished difference Result 17639 states and 51455 transitions. [2021-08-06 15:28:33,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:28:33,075 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 37 [2021-08-06 15:28:33,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:33,111 INFO L225 Difference]: With dead ends: 17639 [2021-08-06 15:28:33,111 INFO L226 Difference]: Without dead ends: 17573 [2021-08-06 15:28:33,111 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 90.0ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:28:33,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17573 states. [2021-08-06 15:28:33,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17573 to 10709. [2021-08-06 15:28:33,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10709 states, 10708 states have (on average 2.941072095629436) internal successors, (31493), 10708 states have internal predecessors, (31493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:33,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10709 states to 10709 states and 31493 transitions. [2021-08-06 15:28:33,319 INFO L78 Accepts]: Start accepts. Automaton has 10709 states and 31493 transitions. Word has length 37 [2021-08-06 15:28:33,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:33,320 INFO L470 AbstractCegarLoop]: Abstraction has 10709 states and 31493 transitions. [2021-08-06 15:28:33,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-08-06 15:28:33,320 INFO L276 IsEmpty]: Start isEmpty. Operand 10709 states and 31493 transitions. [2021-08-06 15:28:33,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:28:33,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:33,334 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:33,354 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:33,534 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:33,534 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:33,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:33,535 INFO L82 PathProgramCache]: Analyzing trace with hash -299107312, now seen corresponding path program 68 times [2021-08-06 15:28:33,535 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:33,535 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996485674] [2021-08-06 15:28:33,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:33,535 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:33,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:33,585 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:33,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:33,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996485674] [2021-08-06 15:28:33,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996485674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:33,585 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1009488388] [2021-08-06 15:28:33,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:28:33,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:33,586 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:33,586 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) [2021-08-06 15:28:33,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-06 15:28:35,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:28:35,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:35,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:28:35,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:35,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1009488388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:35,528 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:35,528 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 15:28:35,528 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540235548] [2021-08-06 15:28:35,528 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:28:35,528 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:35,528 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:28:35,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:28:35,529 INFO L87 Difference]: Start difference. First operand 10709 states and 31493 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:36,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:36,016 INFO L93 Difference]: Finished difference Result 22210 states and 64100 transitions. [2021-08-06 15:28:36,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 15:28:36,017 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:28:36,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:36,058 INFO L225 Difference]: With dead ends: 22210 [2021-08-06 15:28:36,058 INFO L226 Difference]: Without dead ends: 22204 [2021-08-06 15:28:36,058 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 312.5ms TimeCoverageRelationStatistics Valid=578, Invalid=1314, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:28:36,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22204 states. [2021-08-06 15:28:36,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22204 to 14316. [2021-08-06 15:28:36,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14316 states, 14315 states have (on average 2.958435207823961) internal successors, (42350), 14315 states have internal predecessors, (42350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:36,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14316 states to 14316 states and 42350 transitions. [2021-08-06 15:28:36,420 INFO L78 Accepts]: Start accepts. Automaton has 14316 states and 42350 transitions. Word has length 37 [2021-08-06 15:28:36,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:36,420 INFO L470 AbstractCegarLoop]: Abstraction has 14316 states and 42350 transitions. [2021-08-06 15:28:36,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:36,420 INFO L276 IsEmpty]: Start isEmpty. Operand 14316 states and 42350 transitions. [2021-08-06 15:28:36,440 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:28:36,441 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:36,441 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:36,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-06 15:28:36,641 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,SelfDestructingSolverStorable85 [2021-08-06 15:28:36,641 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:36,641 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:36,641 INFO L82 PathProgramCache]: Analyzing trace with hash -509804358, now seen corresponding path program 69 times [2021-08-06 15:28:36,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:36,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964570016] [2021-08-06 15:28:36,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:36,642 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:36,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:36,692 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:36,692 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:36,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964570016] [2021-08-06 15:28:36,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964570016] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:36,692 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584657170] [2021-08-06 15:28:36,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:28:36,692 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:36,692 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:36,693 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) [2021-08-06 15:28:36,693 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-06 15:28:38,430 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:28:38,430 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:38,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:28:38,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:38,643 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:38,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584657170] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:38,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:38,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 15:28:38,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466734840] [2021-08-06 15:28:38,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:28:38,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:38,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:28:38,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:28:38,644 INFO L87 Difference]: Start difference. First operand 14316 states and 42350 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:39,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:39,032 INFO L93 Difference]: Finished difference Result 18669 states and 54267 transitions. [2021-08-06 15:28:39,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:28:39,033 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:28:39,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:39,068 INFO L225 Difference]: With dead ends: 18669 [2021-08-06 15:28:39,068 INFO L226 Difference]: Without dead ends: 18657 [2021-08-06 15:28:39,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 215.2ms TimeCoverageRelationStatistics Valid=417, Invalid=773, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:28:39,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18657 states. [2021-08-06 15:28:39,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18657 to 15376. [2021-08-06 15:28:39,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15376 states, 15375 states have (on average 2.9668943089430893) internal successors, (45616), 15375 states have internal predecessors, (45616), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:39,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15376 states to 15376 states and 45616 transitions. [2021-08-06 15:28:39,453 INFO L78 Accepts]: Start accepts. Automaton has 15376 states and 45616 transitions. Word has length 37 [2021-08-06 15:28:39,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:39,453 INFO L470 AbstractCegarLoop]: Abstraction has 15376 states and 45616 transitions. [2021-08-06 15:28:39,453 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:39,453 INFO L276 IsEmpty]: Start isEmpty. Operand 15376 states and 45616 transitions. [2021-08-06 15:28:39,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:28:39,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:39,475 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:39,495 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-06 15:28:39,675 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:39,675 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:39,675 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:39,675 INFO L82 PathProgramCache]: Analyzing trace with hash 218947460, now seen corresponding path program 70 times [2021-08-06 15:28:39,676 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:39,676 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022038794] [2021-08-06 15:28:39,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:39,676 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:39,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:39,732 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:39,732 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:39,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022038794] [2021-08-06 15:28:39,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022038794] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:39,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1708919075] [2021-08-06 15:28:39,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:28:39,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:39,732 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:39,733 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) [2021-08-06 15:28:39,734 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-06 15:28:41,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:28:41,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:41,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:28:41,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:41,675 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:41,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1708919075] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:41,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:41,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 15:28:41,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998206520] [2021-08-06 15:28:41,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:28:41,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:41,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:28:41,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:28:41,676 INFO L87 Difference]: Start difference. First operand 15376 states and 45616 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:42,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:42,158 INFO L93 Difference]: Finished difference Result 19128 states and 55390 transitions. [2021-08-06 15:28:42,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 15:28:42,158 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:28:42,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:42,194 INFO L225 Difference]: With dead ends: 19128 [2021-08-06 15:28:42,194 INFO L226 Difference]: Without dead ends: 19128 [2021-08-06 15:28:42,195 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 295.7ms TimeCoverageRelationStatistics Valid=568, Invalid=1072, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:28:42,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19128 states. [2021-08-06 15:28:42,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19128 to 13924. [2021-08-06 15:28:42,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13924 states, 13923 states have (on average 2.95970695970696) internal successors, (41208), 13923 states have internal predecessors, (41208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:42,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13924 states to 13924 states and 41208 transitions. [2021-08-06 15:28:42,607 INFO L78 Accepts]: Start accepts. Automaton has 13924 states and 41208 transitions. Word has length 37 [2021-08-06 15:28:42,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:42,607 INFO L470 AbstractCegarLoop]: Abstraction has 13924 states and 41208 transitions. [2021-08-06 15:28:42,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:42,608 INFO L276 IsEmpty]: Start isEmpty. Operand 13924 states and 41208 transitions. [2021-08-06 15:28:42,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:28:42,626 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:42,626 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:42,647 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-06 15:28:42,827 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:42,827 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:42,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:42,827 INFO L82 PathProgramCache]: Analyzing trace with hash -158023694, now seen corresponding path program 71 times [2021-08-06 15:28:42,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:42,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277242516] [2021-08-06 15:28:42,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:42,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:42,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:42,876 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:42,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:42,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277242516] [2021-08-06 15:28:42,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1277242516] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:42,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962451232] [2021-08-06 15:28:42,877 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:28:42,877 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:42,877 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:42,878 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) [2021-08-06 15:28:42,879 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-06 15:28:44,650 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:28:44,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:44,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:28:44,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:44,851 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:44,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962451232] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:44,852 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:44,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 15:28:44,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253008298] [2021-08-06 15:28:44,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:28:44,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:44,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:28:44,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:28:44,852 INFO L87 Difference]: Start difference. First operand 13924 states and 41208 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:45,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:45,262 INFO L93 Difference]: Finished difference Result 21416 states and 61999 transitions. [2021-08-06 15:28:45,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 15:28:45,262 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:28:45,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:45,306 INFO L225 Difference]: With dead ends: 21416 [2021-08-06 15:28:45,306 INFO L226 Difference]: Without dead ends: 21402 [2021-08-06 15:28:45,307 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 218.3ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:28:45,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21402 states. [2021-08-06 15:28:45,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21402 to 12522. [2021-08-06 15:28:45,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12522 states, 12521 states have (on average 2.9471288235763917) internal successors, (36901), 12521 states have internal predecessors, (36901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:45,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12522 states to 12522 states and 36901 transitions. [2021-08-06 15:28:45,687 INFO L78 Accepts]: Start accepts. Automaton has 12522 states and 36901 transitions. Word has length 37 [2021-08-06 15:28:45,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:45,687 INFO L470 AbstractCegarLoop]: Abstraction has 12522 states and 36901 transitions. [2021-08-06 15:28:45,687 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:45,687 INFO L276 IsEmpty]: Start isEmpty. Operand 12522 states and 36901 transitions. [2021-08-06 15:28:45,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:28:45,706 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:45,706 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:45,735 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:45,906 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,SelfDestructingSolverStorable88 [2021-08-06 15:28:45,907 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:45,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:45,907 INFO L82 PathProgramCache]: Analyzing trace with hash -73624920, now seen corresponding path program 72 times [2021-08-06 15:28:45,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:45,907 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900066539] [2021-08-06 15:28:45,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:45,907 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:45,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:45,961 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:45,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:45,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900066539] [2021-08-06 15:28:45,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900066539] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:45,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13449280] [2021-08-06 15:28:45,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:28:45,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:45,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:45,964 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) [2021-08-06 15:28:45,964 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-06 15:28:47,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 15:28:47,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:47,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:28:47,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:48,071 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:48,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13449280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:48,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:48,072 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 15:28:48,072 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120597704] [2021-08-06 15:28:48,072 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:28:48,072 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:48,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:28:48,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:28:48,072 INFO L87 Difference]: Start difference. First operand 12522 states and 36901 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:48,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:48,415 INFO L93 Difference]: Finished difference Result 21217 states and 61477 transitions. [2021-08-06 15:28:48,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:28:48,416 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:28:48,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:48,455 INFO L225 Difference]: With dead ends: 21217 [2021-08-06 15:28:48,455 INFO L226 Difference]: Without dead ends: 21161 [2021-08-06 15:28:48,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 210.0ms TimeCoverageRelationStatistics Valid=274, Invalid=782, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:28:48,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21161 states. [2021-08-06 15:28:48,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21161 to 13076. [2021-08-06 15:28:48,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13076 states, 13075 states have (on average 2.944244741873805) internal successors, (38496), 13075 states have internal predecessors, (38496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:48,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13076 states to 13076 states and 38496 transitions. [2021-08-06 15:28:48,843 INFO L78 Accepts]: Start accepts. Automaton has 13076 states and 38496 transitions. Word has length 37 [2021-08-06 15:28:48,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:48,843 INFO L470 AbstractCegarLoop]: Abstraction has 13076 states and 38496 transitions. [2021-08-06 15:28:48,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:48,844 INFO L276 IsEmpty]: Start isEmpty. Operand 13076 states and 38496 transitions. [2021-08-06 15:28:48,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:28:48,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:48,860 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:48,880 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-08-06 15:28:49,060 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,SelfDestructingSolverStorable89 [2021-08-06 15:28:49,060 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:49,061 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:49,061 INFO L82 PathProgramCache]: Analyzing trace with hash 1566412590, now seen corresponding path program 73 times [2021-08-06 15:28:49,061 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:49,061 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429380968] [2021-08-06 15:28:49,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:49,061 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:49,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:49,118 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:49,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:49,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429380968] [2021-08-06 15:28:49,119 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429380968] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:49,119 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409073414] [2021-08-06 15:28:49,119 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:28:49,119 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:49,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:49,119 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) [2021-08-06 15:28:49,120 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-06 15:28:50,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:50,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:28:50,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:51,097 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:51,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409073414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:51,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:51,097 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 15:28:51,097 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288305275] [2021-08-06 15:28:51,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:28:51,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:51,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:28:51,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:28:51,098 INFO L87 Difference]: Start difference. First operand 13076 states and 38496 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:51,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:51,367 INFO L93 Difference]: Finished difference Result 19540 states and 56766 transitions. [2021-08-06 15:28:51,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:28:51,368 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:28:51,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:51,404 INFO L225 Difference]: With dead ends: 19540 [2021-08-06 15:28:51,404 INFO L226 Difference]: Without dead ends: 19491 [2021-08-06 15:28:51,404 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 169.5ms TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2021-08-06 15:28:51,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19491 states. [2021-08-06 15:28:51,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19491 to 13090. [2021-08-06 15:28:51,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13090 states, 13089 states have (on average 2.9416303766521508) internal successors, (38503), 13089 states have internal predecessors, (38503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:51,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13090 states to 13090 states and 38503 transitions. [2021-08-06 15:28:51,692 INFO L78 Accepts]: Start accepts. Automaton has 13090 states and 38503 transitions. Word has length 37 [2021-08-06 15:28:51,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:51,692 INFO L470 AbstractCegarLoop]: Abstraction has 13090 states and 38503 transitions. [2021-08-06 15:28:51,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:51,692 INFO L276 IsEmpty]: Start isEmpty. Operand 13090 states and 38503 transitions. [2021-08-06 15:28:51,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:28:51,710 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:51,710 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:51,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Ended with exit code 0 [2021-08-06 15:28:51,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:51,911 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:51,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:51,911 INFO L82 PathProgramCache]: Analyzing trace with hash -290512654, now seen corresponding path program 74 times [2021-08-06 15:28:51,911 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:51,911 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104871412] [2021-08-06 15:28:51,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:51,911 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:51,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:51,967 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:51,967 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:51,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104871412] [2021-08-06 15:28:51,967 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2104871412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:51,967 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584148549] [2021-08-06 15:28:51,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:28:51,968 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:51,968 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:51,968 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) [2021-08-06 15:28:51,969 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-06 15:28:53,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:28:53,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:53,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:28:53,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:53,966 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:53,966 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584148549] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:53,966 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:53,966 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 15:28:53,966 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440056649] [2021-08-06 15:28:53,966 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:28:53,966 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:53,966 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:28:53,966 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:28:53,967 INFO L87 Difference]: Start difference. First operand 13090 states and 38503 transitions. Second operand has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:54,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:54,427 INFO L93 Difference]: Finished difference Result 18207 states and 52420 transitions. [2021-08-06 15:28:54,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 15:28:54,428 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:28:54,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:54,460 INFO L225 Difference]: With dead ends: 18207 [2021-08-06 15:28:54,460 INFO L226 Difference]: Without dead ends: 18147 [2021-08-06 15:28:54,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 268.1ms TimeCoverageRelationStatistics Valid=475, Invalid=1007, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:28:54,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18147 states. [2021-08-06 15:28:54,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18147 to 13262. [2021-08-06 15:28:54,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13262 states, 13261 states have (on average 2.932584269662921) internal successors, (38889), 13261 states have internal predecessors, (38889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:54,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13262 states to 13262 states and 38889 transitions. [2021-08-06 15:28:54,733 INFO L78 Accepts]: Start accepts. Automaton has 13262 states and 38889 transitions. Word has length 37 [2021-08-06 15:28:54,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:54,733 INFO L470 AbstractCegarLoop]: Abstraction has 13262 states and 38889 transitions. [2021-08-06 15:28:54,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5) internal successors, (49), 14 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:54,734 INFO L276 IsEmpty]: Start isEmpty. Operand 13262 states and 38889 transitions. [2021-08-06 15:28:54,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:28:54,752 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:54,752 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:54,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-06 15:28:54,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:54,953 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:54,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:54,953 INFO L82 PathProgramCache]: Analyzing trace with hash 126146986, now seen corresponding path program 75 times [2021-08-06 15:28:54,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:54,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2033635616] [2021-08-06 15:28:54,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:54,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:54,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:55,014 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:55,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:55,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2033635616] [2021-08-06 15:28:55,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2033635616] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:55,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668508267] [2021-08-06 15:28:55,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:28:55,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:55,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:55,023 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) [2021-08-06 15:28:55,024 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-06 15:28:56,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:28:56,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:28:56,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:28:56,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:28:57,057 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:57,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668508267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:57,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:28:57,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-06 15:28:57,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [246508826] [2021-08-06 15:28:57,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:28:57,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:28:57,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:28:57,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:28:57,058 INFO L87 Difference]: Start difference. First operand 13262 states and 38889 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:57,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:28:57,566 INFO L93 Difference]: Finished difference Result 18702 states and 53466 transitions. [2021-08-06 15:28:57,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:28:57,566 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:28:57,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:28:57,607 INFO L225 Difference]: With dead ends: 18702 [2021-08-06 15:28:57,607 INFO L226 Difference]: Without dead ends: 18695 [2021-08-06 15:28:57,607 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 416 ImplicationChecksByTransitivity, 334.7ms TimeCoverageRelationStatistics Valid=603, Invalid=1119, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:28:57,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18695 states. [2021-08-06 15:28:57,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18695 to 13690. [2021-08-06 15:28:57,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13690 states, 13689 states have (on average 2.9304551099422893) internal successors, (40115), 13689 states have internal predecessors, (40115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:57,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13690 states to 13690 states and 40115 transitions. [2021-08-06 15:28:57,915 INFO L78 Accepts]: Start accepts. Automaton has 13690 states and 40115 transitions. Word has length 37 [2021-08-06 15:28:57,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:28:57,915 INFO L470 AbstractCegarLoop]: Abstraction has 13690 states and 40115 transitions. [2021-08-06 15:28:57,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:28:57,916 INFO L276 IsEmpty]: Start isEmpty. Operand 13690 states and 40115 transitions. [2021-08-06 15:28:57,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:28:57,936 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:28:57,936 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:28:57,958 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-06 15:28:58,137 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,SelfDestructingSolverStorable92 [2021-08-06 15:28:58,137 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:28:58,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:28:58,137 INFO L82 PathProgramCache]: Analyzing trace with hash -188312970, now seen corresponding path program 76 times [2021-08-06 15:28:58,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:28:58,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395834303] [2021-08-06 15:28:58,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:28:58,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:28:58,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:28:58,186 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:28:58,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:28:58,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395834303] [2021-08-06 15:28:58,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395834303] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:28:58,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [323216772] [2021-08-06 15:28:58,187 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:28:58,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:28:58,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:28:58,188 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) [2021-08-06 15:28:58,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-06 15:29:00,066 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:29:00,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:00,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:29:00,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:00,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [323216772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:00,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:00,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 15:29:00,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004689667] [2021-08-06 15:29:00,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:29:00,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:00,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:29:00,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:29:00,342 INFO L87 Difference]: Start difference. First operand 13690 states and 40115 transitions. Second operand has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:00,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:00,842 INFO L93 Difference]: Finished difference Result 19896 states and 57093 transitions. [2021-08-06 15:29:00,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 15:29:00,842 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:29:00,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:00,884 INFO L225 Difference]: With dead ends: 19896 [2021-08-06 15:29:00,884 INFO L226 Difference]: Without dead ends: 19782 [2021-08-06 15:29:00,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 349.4ms TimeCoverageRelationStatistics Valid=512, Invalid=1210, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:29:00,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19782 states. [2021-08-06 15:29:01,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19782 to 15598. [2021-08-06 15:29:01,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15598 states, 15597 states have (on average 2.9260114124511123) internal successors, (45637), 15597 states have internal predecessors, (45637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:01,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15598 states to 15598 states and 45637 transitions. [2021-08-06 15:29:01,241 INFO L78 Accepts]: Start accepts. Automaton has 15598 states and 45637 transitions. Word has length 37 [2021-08-06 15:29:01,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:01,242 INFO L470 AbstractCegarLoop]: Abstraction has 15598 states and 45637 transitions. [2021-08-06 15:29:01,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.466666666666667) internal successors, (52), 15 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:01,242 INFO L276 IsEmpty]: Start isEmpty. Operand 15598 states and 45637 transitions. [2021-08-06 15:29:01,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:29:01,266 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:01,266 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:01,287 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:01,466 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:01,466 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:01,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:01,466 INFO L82 PathProgramCache]: Analyzing trace with hash 63148932, now seen corresponding path program 77 times [2021-08-06 15:29:01,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:01,467 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996313087] [2021-08-06 15:29:01,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:01,467 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:01,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:01,511 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:01,511 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:01,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996313087] [2021-08-06 15:29:01,511 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996313087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:01,511 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238023256] [2021-08-06 15:29:01,511 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:29:01,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:01,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:01,512 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) [2021-08-06 15:29:01,513 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-06 15:29:03,370 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:29:03,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:03,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:29:03,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:03,584 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:03,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1238023256] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:03,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:03,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-08-06 15:29:03,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340261707] [2021-08-06 15:29:03,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:29:03,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:03,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:29:03,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:29:03,585 INFO L87 Difference]: Start difference. First operand 15598 states and 45637 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:04,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:04,060 INFO L93 Difference]: Finished difference Result 23975 states and 68834 transitions. [2021-08-06 15:29:04,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:29:04,060 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:29:04,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:04,106 INFO L225 Difference]: With dead ends: 23975 [2021-08-06 15:29:04,106 INFO L226 Difference]: Without dead ends: 23968 [2021-08-06 15:29:04,107 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 283.9ms TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 15:29:04,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23968 states. [2021-08-06 15:29:04,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23968 to 19902. [2021-08-06 15:29:04,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19902 states, 19901 states have (on average 2.9230189437716696) internal successors, (58171), 19901 states have internal predecessors, (58171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:04,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19902 states to 19902 states and 58171 transitions. [2021-08-06 15:29:04,500 INFO L78 Accepts]: Start accepts. Automaton has 19902 states and 58171 transitions. Word has length 37 [2021-08-06 15:29:04,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:04,500 INFO L470 AbstractCegarLoop]: Abstraction has 19902 states and 58171 transitions. [2021-08-06 15:29:04,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:04,500 INFO L276 IsEmpty]: Start isEmpty. Operand 19902 states and 58171 transitions. [2021-08-06 15:29:04,525 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:29:04,525 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:04,526 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:04,546 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-06 15:29:04,726 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:04,726 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:04,726 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:04,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1849245336, now seen corresponding path program 78 times [2021-08-06 15:29:04,727 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:04,727 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925202843] [2021-08-06 15:29:04,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:04,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:04,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:04,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:04,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925202843] [2021-08-06 15:29:04,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925202843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:04,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999996816] [2021-08-06 15:29:04,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:29:04,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:04,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:04,792 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) [2021-08-06 15:29:04,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-06 15:29:06,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:29:06,666 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:06,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:29:06,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:06,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999996816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:06,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:06,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 15:29:06,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180227790] [2021-08-06 15:29:06,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:29:06,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:06,864 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:29:06,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:29:06,864 INFO L87 Difference]: Start difference. First operand 19902 states and 58171 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-08-06 15:29:07,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:07,071 INFO L93 Difference]: Finished difference Result 22936 states and 66683 transitions. [2021-08-06 15:29:07,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:29:07,072 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 37 [2021-08-06 15:29:07,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:07,114 INFO L225 Difference]: With dead ends: 22936 [2021-08-06 15:29:07,114 INFO L226 Difference]: Without dead ends: 22936 [2021-08-06 15:29:07,114 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 92.4ms TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:29:07,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22936 states. [2021-08-06 15:29:07,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22936 to 20168. [2021-08-06 15:29:07,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20168 states, 20167 states have (on average 2.9221004611494026) internal successors, (58930), 20167 states have internal predecessors, (58930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:07,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20168 states to 20168 states and 58930 transitions. [2021-08-06 15:29:07,554 INFO L78 Accepts]: Start accepts. Automaton has 20168 states and 58930 transitions. Word has length 37 [2021-08-06 15:29:07,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:07,554 INFO L470 AbstractCegarLoop]: Abstraction has 20168 states and 58930 transitions. [2021-08-06 15:29:07,554 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-08-06 15:29:07,554 INFO L276 IsEmpty]: Start isEmpty. Operand 20168 states and 58930 transitions. [2021-08-06 15:29:07,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:29:07,581 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:07,581 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:07,602 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Ended with exit code 0 [2021-08-06 15:29:07,781 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,SelfDestructingSolverStorable95 [2021-08-06 15:29:07,781 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:07,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:07,781 INFO L82 PathProgramCache]: Analyzing trace with hash -913601656, now seen corresponding path program 79 times [2021-08-06 15:29:07,782 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:07,782 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363817166] [2021-08-06 15:29:07,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:07,782 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:07,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:07,847 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:07,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:07,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363817166] [2021-08-06 15:29:07,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363817166] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:07,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780209547] [2021-08-06 15:29:07,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:29:07,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:07,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:07,849 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) [2021-08-06 15:29:07,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-06 15:29:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:09,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:29:09,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:09,899 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:09,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1780209547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:09,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:09,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 15:29:09,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [294764701] [2021-08-06 15:29:09,899 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 15:29:09,899 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:09,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 15:29:09,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-06 15:29:09,900 INFO L87 Difference]: Start difference. First operand 20168 states and 58930 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-08-06 15:29:10,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:10,077 INFO L93 Difference]: Finished difference Result 24551 states and 71034 transitions. [2021-08-06 15:29:10,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 15:29:10,078 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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 37 [2021-08-06 15:29:10,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:10,123 INFO L225 Difference]: With dead ends: 24551 [2021-08-06 15:29:10,123 INFO L226 Difference]: Without dead ends: 24497 [2021-08-06 15:29:10,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 90.3ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:29:10,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24497 states. [2021-08-06 15:29:10,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24497 to 20168. [2021-08-06 15:29:10,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20168 states, 20167 states have (on average 2.9216046015768335) internal successors, (58920), 20167 states have internal predecessors, (58920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:10,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20168 states to 20168 states and 58920 transitions. [2021-08-06 15:29:10,522 INFO L78 Accepts]: Start accepts. Automaton has 20168 states and 58920 transitions. Word has length 37 [2021-08-06 15:29:10,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:10,522 INFO L470 AbstractCegarLoop]: Abstraction has 20168 states and 58920 transitions. [2021-08-06 15:29:10,522 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 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) [2021-08-06 15:29:10,522 INFO L276 IsEmpty]: Start isEmpty. Operand 20168 states and 58920 transitions. [2021-08-06 15:29:10,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:29:10,547 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:10,547 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:10,567 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-08-06 15:29:10,747 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:10,747 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:10,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:10,747 INFO L82 PathProgramCache]: Analyzing trace with hash 1810456310, now seen corresponding path program 80 times [2021-08-06 15:29:10,748 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:10,748 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380720715] [2021-08-06 15:29:10,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:10,748 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:10,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:10,796 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:10,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:10,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380720715] [2021-08-06 15:29:10,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380720715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:10,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [817728097] [2021-08-06 15:29:10,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:29:10,797 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:10,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:10,798 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) [2021-08-06 15:29:10,799 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-06 15:29:12,716 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:29:12,716 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:12,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:29:12,717 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:12,926 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:12,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [817728097] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:12,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:12,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 15:29:12,926 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871933255] [2021-08-06 15:29:12,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:29:12,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:12,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:29:12,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:29:12,926 INFO L87 Difference]: Start difference. First operand 20168 states and 58920 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:13,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:13,203 INFO L93 Difference]: Finished difference Result 22851 states and 66117 transitions. [2021-08-06 15:29:13,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 15:29:13,203 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:29:13,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:13,247 INFO L225 Difference]: With dead ends: 22851 [2021-08-06 15:29:13,248 INFO L226 Difference]: Without dead ends: 22851 [2021-08-06 15:29:13,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 131.5ms TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:29:13,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22851 states. [2021-08-06 15:29:13,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22851 to 20512. [2021-08-06 15:29:13,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20512 states, 20511 states have (on average 2.9201891667885524) internal successors, (59896), 20511 states have internal predecessors, (59896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:13,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20512 states to 20512 states and 59896 transitions. [2021-08-06 15:29:13,606 INFO L78 Accepts]: Start accepts. Automaton has 20512 states and 59896 transitions. Word has length 37 [2021-08-06 15:29:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:13,607 INFO L470 AbstractCegarLoop]: Abstraction has 20512 states and 59896 transitions. [2021-08-06 15:29:13,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:13,608 INFO L276 IsEmpty]: Start isEmpty. Operand 20512 states and 59896 transitions. [2021-08-06 15:29:13,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:29:13,635 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:13,635 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:13,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:13,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:13,842 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:13,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:13,842 INFO L82 PathProgramCache]: Analyzing trace with hash 6994976, now seen corresponding path program 81 times [2021-08-06 15:29:13,842 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:13,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779075746] [2021-08-06 15:29:13,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:13,842 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:13,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:13,890 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:13,890 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:13,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779075746] [2021-08-06 15:29:13,890 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779075746] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:13,890 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1504832208] [2021-08-06 15:29:13,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:29:13,890 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:13,891 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:13,892 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) [2021-08-06 15:29:13,892 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-06 15:29:15,871 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:29:15,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:15,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:29:15,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:16,074 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:16,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1504832208] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:16,074 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:16,074 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 15:29:16,074 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337737278] [2021-08-06 15:29:16,075 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:29:16,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:16,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:29:16,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:29:16,075 INFO L87 Difference]: Start difference. First operand 20512 states and 59896 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:16,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:16,368 INFO L93 Difference]: Finished difference Result 25378 states and 73051 transitions. [2021-08-06 15:29:16,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:29:16,368 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:29:16,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:16,414 INFO L225 Difference]: With dead ends: 25378 [2021-08-06 15:29:16,415 INFO L226 Difference]: Without dead ends: 25336 [2021-08-06 15:29:16,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 182.9ms TimeCoverageRelationStatistics Valid=235, Invalid=635, Unknown=0, NotChecked=0, Total=870 [2021-08-06 15:29:16,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25336 states. [2021-08-06 15:29:16,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25336 to 21132. [2021-08-06 15:29:16,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21132 states, 21131 states have (on average 2.924707775306422) internal successors, (61802), 21131 states have internal predecessors, (61802), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21132 states to 21132 states and 61802 transitions. [2021-08-06 15:29:16,830 INFO L78 Accepts]: Start accepts. Automaton has 21132 states and 61802 transitions. Word has length 37 [2021-08-06 15:29:16,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:16,830 INFO L470 AbstractCegarLoop]: Abstraction has 21132 states and 61802 transitions. [2021-08-06 15:29:16,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:16,830 INFO L276 IsEmpty]: Start isEmpty. Operand 21132 states and 61802 transitions. [2021-08-06 15:29:16,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:29:16,857 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:16,857 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:16,878 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-06 15:29:17,057 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,SelfDestructingSolverStorable98 [2021-08-06 15:29:17,058 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:17,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:17,058 INFO L82 PathProgramCache]: Analyzing trace with hash -195473192, now seen corresponding path program 82 times [2021-08-06 15:29:17,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:17,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729970996] [2021-08-06 15:29:17,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:17,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:17,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:17,103 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:17,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:17,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729970996] [2021-08-06 15:29:17,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729970996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:17,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882015795] [2021-08-06 15:29:17,105 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:29:17,105 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:17,105 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:17,105 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) [2021-08-06 15:29:17,128 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-06 15:29:19,071 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:29:19,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:19,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:29:19,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:19,294 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:19,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882015795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:19,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:19,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 15:29:19,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820244242] [2021-08-06 15:29:19,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:29:19,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:19,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:29:19,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:29:19,295 INFO L87 Difference]: Start difference. First operand 21132 states and 61802 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:19,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:19,765 INFO L93 Difference]: Finished difference Result 26806 states and 77177 transitions. [2021-08-06 15:29:19,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 15:29:19,765 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:29:19,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:19,816 INFO L225 Difference]: With dead ends: 26806 [2021-08-06 15:29:19,816 INFO L226 Difference]: Without dead ends: 26806 [2021-08-06 15:29:19,816 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 246.4ms TimeCoverageRelationStatistics Valid=425, Invalid=907, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 15:29:19,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26806 states. [2021-08-06 15:29:20,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26806 to 22606. [2021-08-06 15:29:20,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22606 states, 22605 states have (on average 2.92081397920814) internal successors, (66025), 22605 states have internal predecessors, (66025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:20,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22606 states to 22606 states and 66025 transitions. [2021-08-06 15:29:20,275 INFO L78 Accepts]: Start accepts. Automaton has 22606 states and 66025 transitions. Word has length 37 [2021-08-06 15:29:20,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:20,275 INFO L470 AbstractCegarLoop]: Abstraction has 22606 states and 66025 transitions. [2021-08-06 15:29:20,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:20,275 INFO L276 IsEmpty]: Start isEmpty. Operand 22606 states and 66025 transitions. [2021-08-06 15:29:20,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:29:20,303 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:20,303 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:20,323 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:20,503 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:20,503 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:20,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:20,504 INFO L82 PathProgramCache]: Analyzing trace with hash -2123951122, now seen corresponding path program 83 times [2021-08-06 15:29:20,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:20,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585818361] [2021-08-06 15:29:20,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:20,504 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:20,560 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:20,560 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:20,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585818361] [2021-08-06 15:29:20,560 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585818361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:20,560 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1092056831] [2021-08-06 15:29:20,560 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:29:20,560 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:20,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:20,561 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) [2021-08-06 15:29:20,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-06 15:29:22,457 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 15:29:22,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:22,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:29:22,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:22,659 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 8 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:22,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1092056831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:22,659 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:22,659 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 15:29:22,659 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805001102] [2021-08-06 15:29:22,660 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:29:22,660 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:22,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:29:22,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:29:22,660 INFO L87 Difference]: Start difference. First operand 22606 states and 66025 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:23,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:23,117 INFO L93 Difference]: Finished difference Result 29720 states and 85805 transitions. [2021-08-06 15:29:23,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 15:29:23,117 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:29:23,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:23,175 INFO L225 Difference]: With dead ends: 29720 [2021-08-06 15:29:23,176 INFO L226 Difference]: Without dead ends: 29672 [2021-08-06 15:29:23,176 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 284.0ms TimeCoverageRelationStatistics Valid=293, Invalid=829, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:29:23,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29672 states. [2021-08-06 15:29:23,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29672 to 25600. [2021-08-06 15:29:23,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25600 states, 25599 states have (on average 2.913160670338685) internal successors, (74574), 25599 states have internal predecessors, (74574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:23,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25600 states to 25600 states and 74574 transitions. [2021-08-06 15:29:23,694 INFO L78 Accepts]: Start accepts. Automaton has 25600 states and 74574 transitions. Word has length 37 [2021-08-06 15:29:23,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:23,694 INFO L470 AbstractCegarLoop]: Abstraction has 25600 states and 74574 transitions. [2021-08-06 15:29:23,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:23,695 INFO L276 IsEmpty]: Start isEmpty. Operand 25600 states and 74574 transitions. [2021-08-06 15:29:23,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:29:23,728 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:23,728 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:23,749 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-06 15:29:23,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:23,928 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:23,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:23,928 INFO L82 PathProgramCache]: Analyzing trace with hash 838302262, now seen corresponding path program 84 times [2021-08-06 15:29:23,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:23,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902006445] [2021-08-06 15:29:23,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:23,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:23,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:23,980 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:23,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:23,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902006445] [2021-08-06 15:29:23,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [902006445] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:23,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985099421] [2021-08-06 15:29:23,981 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:29:23,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:23,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:23,981 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:29:23,982 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-06 15:29:25,967 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:29:25,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:25,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:29:25,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:26,179 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:26,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985099421] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:26,179 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:26,179 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 15:29:26,179 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928384060] [2021-08-06 15:29:26,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:29:26,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:26,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:29:26,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:29:26,180 INFO L87 Difference]: Start difference. First operand 25600 states and 74574 transitions. Second operand has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:26,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:26,689 INFO L93 Difference]: Finished difference Result 31521 states and 90635 transitions. [2021-08-06 15:29:26,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 15:29:26,690 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:29:26,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:26,751 INFO L225 Difference]: With dead ends: 31521 [2021-08-06 15:29:26,751 INFO L226 Difference]: Without dead ends: 31521 [2021-08-06 15:29:26,751 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 277.8ms TimeCoverageRelationStatistics Valid=568, Invalid=1072, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 15:29:26,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31521 states. [2021-08-06 15:29:27,349 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31521 to 27384. [2021-08-06 15:29:27,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27384 states, 27383 states have (on average 2.9259759704926416) internal successors, (80122), 27383 states have internal predecessors, (80122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:27,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27384 states to 27384 states and 80122 transitions. [2021-08-06 15:29:27,445 INFO L78 Accepts]: Start accepts. Automaton has 27384 states and 80122 transitions. Word has length 37 [2021-08-06 15:29:27,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:27,445 INFO L470 AbstractCegarLoop]: Abstraction has 27384 states and 80122 transitions. [2021-08-06 15:29:27,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.923076923076923) internal successors, (51), 13 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:27,445 INFO L276 IsEmpty]: Start isEmpty. Operand 27384 states and 80122 transitions. [2021-08-06 15:29:27,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:29:27,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:27,485 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:27,506 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-06 15:29:27,685 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-08-06 15:29:27,685 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:27,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:27,686 INFO L82 PathProgramCache]: Analyzing trace with hash 627605216, now seen corresponding path program 85 times [2021-08-06 15:29:27,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:27,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217178834] [2021-08-06 15:29:27,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:27,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:27,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:27,736 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:27,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:27,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217178834] [2021-08-06 15:29:27,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217178834] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:27,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103970171] [2021-08-06 15:29:27,736 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:29:27,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:27,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:27,739 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:29:27,741 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-06 15:29:29,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:29,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:29:29,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:29,871 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:29,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103970171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:29,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:29,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 15:29:29,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457612331] [2021-08-06 15:29:29,872 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:29:29,872 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:29,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:29:29,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:29:29,872 INFO L87 Difference]: Start difference. First operand 27384 states and 80122 transitions. Second operand has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:30,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:30,485 INFO L93 Difference]: Finished difference Result 33285 states and 96447 transitions. [2021-08-06 15:29:30,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 15:29:30,486 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:29:30,486 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:30,571 INFO L225 Difference]: With dead ends: 33285 [2021-08-06 15:29:30,571 INFO L226 Difference]: Without dead ends: 33267 [2021-08-06 15:29:30,571 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 244.6ms TimeCoverageRelationStatistics Valid=303, Invalid=819, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:29:30,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33267 states. [2021-08-06 15:29:31,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33267 to 27954. [2021-08-06 15:29:31,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27954 states, 27953 states have (on average 2.9269488069259113) internal successors, (81817), 27953 states have internal predecessors, (81817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:31,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27954 states to 27954 states and 81817 transitions. [2021-08-06 15:29:31,187 INFO L78 Accepts]: Start accepts. Automaton has 27954 states and 81817 transitions. Word has length 37 [2021-08-06 15:29:31,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:31,187 INFO L470 AbstractCegarLoop]: Abstraction has 27954 states and 81817 transitions. [2021-08-06 15:29:31,187 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6923076923076925) internal successors, (48), 13 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:31,187 INFO L276 IsEmpty]: Start isEmpty. Operand 27954 states and 81817 transitions. [2021-08-06 15:29:31,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:29:31,227 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:31,227 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:31,248 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:31,427 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-06 15:29:31,428 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:31,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:31,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1356357034, now seen corresponding path program 86 times [2021-08-06 15:29:31,428 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:31,428 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297577438] [2021-08-06 15:29:31,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:31,428 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:31,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:31,475 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:31,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:31,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297577438] [2021-08-06 15:29:31,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297577438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:31,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33212113] [2021-08-06 15:29:31,476 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:29:31,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:31,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:31,476 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:29:31,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-06 15:29:33,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:29:33,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:33,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:29:33,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:33,729 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:33,729 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [33212113] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:33,729 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:33,729 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 15:29:33,729 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1408542125] [2021-08-06 15:29:33,730 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:29:33,730 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:33,730 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:29:33,730 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:29:33,730 INFO L87 Difference]: Start difference. First operand 27954 states and 81817 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:34,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:34,270 INFO L93 Difference]: Finished difference Result 32376 states and 93008 transitions. [2021-08-06 15:29:34,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 15:29:34,270 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:29:34,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:34,336 INFO L225 Difference]: With dead ends: 32376 [2021-08-06 15:29:34,336 INFO L226 Difference]: Without dead ends: 32369 [2021-08-06 15:29:34,336 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 605 ImplicationChecksByTransitivity, 311.5ms TimeCoverageRelationStatistics Valid=578, Invalid=1314, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 15:29:34,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32369 states. [2021-08-06 15:29:34,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32369 to 27014. [2021-08-06 15:29:34,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27014 states, 27013 states have (on average 2.914559656461704) internal successors, (78731), 27013 states have internal predecessors, (78731), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:34,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27014 states to 27014 states and 78731 transitions. [2021-08-06 15:29:34,934 INFO L78 Accepts]: Start accepts. Automaton has 27014 states and 78731 transitions. Word has length 37 [2021-08-06 15:29:34,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:34,934 INFO L470 AbstractCegarLoop]: Abstraction has 27014 states and 78731 transitions. [2021-08-06 15:29:34,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:34,934 INFO L276 IsEmpty]: Start isEmpty. Operand 27014 states and 78731 transitions. [2021-08-06 15:29:34,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:29:34,977 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:34,977 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:35,003 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-08-06 15:29:35,178 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 15:29:35,178 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:35,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:35,178 INFO L82 PathProgramCache]: Analyzing trace with hash 979385880, now seen corresponding path program 87 times [2021-08-06 15:29:35,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:35,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378981289] [2021-08-06 15:29:35,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:35,179 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:35,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:35,229 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:35,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:35,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378981289] [2021-08-06 15:29:35,229 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378981289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:35,229 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678797266] [2021-08-06 15:29:35,230 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:29:35,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:35,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:35,230 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:29:35,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-06 15:29:37,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-06 15:29:37,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:37,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:29:37,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:37,477 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:37,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678797266] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:37,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:37,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 15:29:37,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205189622] [2021-08-06 15:29:37,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:29:37,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:37,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:29:37,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:29:37,478 INFO L87 Difference]: Start difference. First operand 27014 states and 78731 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:37,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:37,902 INFO L93 Difference]: Finished difference Result 29628 states and 85439 transitions. [2021-08-06 15:29:37,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:29:37,902 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:29:37,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:37,961 INFO L225 Difference]: With dead ends: 29628 [2021-08-06 15:29:37,961 INFO L226 Difference]: Without dead ends: 29614 [2021-08-06 15:29:37,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 202.3ms TimeCoverageRelationStatistics Valid=367, Invalid=689, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 15:29:37,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29614 states. [2021-08-06 15:29:38,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29614 to 23956. [2021-08-06 15:29:38,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23956 states, 23955 states have (on average 2.914631600918389) internal successors, (69820), 23955 states have internal predecessors, (69820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:38,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23956 states to 23956 states and 69820 transitions. [2021-08-06 15:29:38,436 INFO L78 Accepts]: Start accepts. Automaton has 23956 states and 69820 transitions. Word has length 37 [2021-08-06 15:29:38,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:38,436 INFO L470 AbstractCegarLoop]: Abstraction has 23956 states and 69820 transitions. [2021-08-06 15:29:38,436 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:38,436 INFO L276 IsEmpty]: Start isEmpty. Operand 23956 states and 69820 transitions. [2021-08-06 15:29:38,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:29:38,466 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:38,467 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:38,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-06 15:29:38,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:38,667 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:38,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:38,667 INFO L82 PathProgramCache]: Analyzing trace with hash -2121681092, now seen corresponding path program 88 times [2021-08-06 15:29:38,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:38,667 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539010555] [2021-08-06 15:29:38,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:38,668 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:38,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:38,792 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:38,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:38,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539010555] [2021-08-06 15:29:38,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539010555] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:38,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000422622] [2021-08-06 15:29:38,793 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:29:38,793 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:38,793 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:38,793 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:29:38,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-06 15:29:40,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:29:40,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:40,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:29:40,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:40,992 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:40,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2000422622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:40,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:40,992 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 15:29:40,992 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1190874133] [2021-08-06 15:29:40,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:29:40,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:40,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:29:40,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:29:40,993 INFO L87 Difference]: Start difference. First operand 23956 states and 69820 transitions. Second operand has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:41,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:41,511 INFO L93 Difference]: Finished difference Result 28263 states and 81286 transitions. [2021-08-06 15:29:41,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:29:41,511 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:29:41,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:41,576 INFO L225 Difference]: With dead ends: 28263 [2021-08-06 15:29:41,576 INFO L226 Difference]: Without dead ends: 28251 [2021-08-06 15:29:41,577 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 230.7ms TimeCoverageRelationStatistics Valid=340, Invalid=782, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 15:29:41,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28251 states. [2021-08-06 15:29:41,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28251 to 24282. [2021-08-06 15:29:41,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24282 states, 24281 states have (on average 2.9153247395082573) internal successors, (70787), 24281 states have internal predecessors, (70787), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:42,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24282 states to 24282 states and 70787 transitions. [2021-08-06 15:29:42,044 INFO L78 Accepts]: Start accepts. Automaton has 24282 states and 70787 transitions. Word has length 37 [2021-08-06 15:29:42,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:42,044 INFO L470 AbstractCegarLoop]: Abstraction has 24282 states and 70787 transitions. [2021-08-06 15:29:42,044 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 14 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:42,044 INFO L276 IsEmpty]: Start isEmpty. Operand 24282 states and 70787 transitions. [2021-08-06 15:29:42,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:29:42,083 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:42,083 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:42,108 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-06 15:29:42,283 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:42,284 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:42,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:42,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1075661426, now seen corresponding path program 89 times [2021-08-06 15:29:42,284 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:42,284 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841729259] [2021-08-06 15:29:42,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:42,284 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:42,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:42,340 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:42,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:42,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841729259] [2021-08-06 15:29:42,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841729259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:42,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974387471] [2021-08-06 15:29:42,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:29:42,341 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:42,341 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:42,342 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:29:42,342 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-06 15:29:44,417 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:29:44,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:44,418 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:29:44,418 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:44,642 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:44,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974387471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:44,642 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:44,642 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-06 15:29:44,642 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129703583] [2021-08-06 15:29:44,643 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:29:44,643 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:44,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:29:44,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:29:44,643 INFO L87 Difference]: Start difference. First operand 24282 states and 70787 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:45,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:45,152 INFO L93 Difference]: Finished difference Result 30400 states and 87330 transitions. [2021-08-06 15:29:45,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:29:45,152 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:29:45,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:45,228 INFO L225 Difference]: With dead ends: 30400 [2021-08-06 15:29:45,228 INFO L226 Difference]: Without dead ends: 30394 [2021-08-06 15:29:45,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 268.2ms TimeCoverageRelationStatistics Valid=390, Invalid=800, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:29:45,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30394 states. [2021-08-06 15:29:45,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30394 to 24292. [2021-08-06 15:29:45,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24292 states, 24291 states have (on average 2.915647770779301) internal successors, (70824), 24291 states have internal predecessors, (70824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:45,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24292 states to 24292 states and 70824 transitions. [2021-08-06 15:29:45,921 INFO L78 Accepts]: Start accepts. Automaton has 24292 states and 70824 transitions. Word has length 37 [2021-08-06 15:29:45,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:45,922 INFO L470 AbstractCegarLoop]: Abstraction has 24292 states and 70824 transitions. [2021-08-06 15:29:45,922 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:45,922 INFO L276 IsEmpty]: Start isEmpty. Operand 24292 states and 70824 transitions. [2021-08-06 15:29:45,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:29:45,954 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:45,954 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:45,975 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-08-06 15:29:46,154 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:46,155 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:46,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:46,155 INFO L82 PathProgramCache]: Analyzing trace with hash 1974956796, now seen corresponding path program 90 times [2021-08-06 15:29:46,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:46,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528276586] [2021-08-06 15:29:46,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:46,155 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:46,200 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:46,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:46,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528276586] [2021-08-06 15:29:46,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528276586] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:46,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1753510153] [2021-08-06 15:29:46,201 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:29:46,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:46,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:46,202 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:29:46,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-06 15:29:48,277 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:29:48,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:48,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:29:48,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:48,499 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:48,500 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1753510153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:48,500 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:48,500 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-06 15:29:48,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125744001] [2021-08-06 15:29:48,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:29:48,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:48,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:29:48,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:29:48,500 INFO L87 Difference]: Start difference. First operand 24292 states and 70824 transitions. Second operand has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:49,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:49,043 INFO L93 Difference]: Finished difference Result 31964 states and 91804 transitions. [2021-08-06 15:29:49,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 15:29:49,043 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:29:49,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:49,116 INFO L225 Difference]: With dead ends: 31964 [2021-08-06 15:29:49,116 INFO L226 Difference]: Without dead ends: 31964 [2021-08-06 15:29:49,117 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 400 ImplicationChecksByTransitivity, 302.0ms TimeCoverageRelationStatistics Valid=603, Invalid=1119, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 15:29:49,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31964 states. [2021-08-06 15:29:49,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31964 to 26278. [2021-08-06 15:29:49,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26278 states, 26277 states have (on average 2.919244967081478) internal successors, (76709), 26277 states have internal predecessors, (76709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:49,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26278 states to 26278 states and 76709 transitions. [2021-08-06 15:29:49,683 INFO L78 Accepts]: Start accepts. Automaton has 26278 states and 76709 transitions. Word has length 37 [2021-08-06 15:29:49,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:49,683 INFO L470 AbstractCegarLoop]: Abstraction has 26278 states and 76709 transitions. [2021-08-06 15:29:49,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.0) internal successors, (52), 13 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:49,683 INFO L276 IsEmpty]: Start isEmpty. Operand 26278 states and 76709 transitions. [2021-08-06 15:29:49,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:29:49,725 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:49,725 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:49,746 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-08-06 15:29:49,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-06 15:29:49,925 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:49,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:49,926 INFO L82 PathProgramCache]: Analyzing trace with hash 2116040414, now seen corresponding path program 91 times [2021-08-06 15:29:49,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:49,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1245355325] [2021-08-06 15:29:49,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:49,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:50,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:50,063 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:29:50,063 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:50,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1245355325] [2021-08-06 15:29:50,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1245355325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:50,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1282431060] [2021-08-06 15:29:50,064 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:29:50,064 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:50,064 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:50,077 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:29:50,085 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-06 15:29:52,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:52,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:29:52,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:52,352 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:52,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1282431060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:52,353 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:52,353 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-06 15:29:52,353 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417450625] [2021-08-06 15:29:52,353 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:29:52,353 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:52,353 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:29:52,353 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:29:52,353 INFO L87 Difference]: Start difference. First operand 26278 states and 76709 transitions. Second operand has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:52,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:52,790 INFO L93 Difference]: Finished difference Result 31151 states and 89602 transitions. [2021-08-06 15:29:52,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 15:29:52,790 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:29:52,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:52,851 INFO L225 Difference]: With dead ends: 31151 [2021-08-06 15:29:52,851 INFO L226 Difference]: Without dead ends: 31130 [2021-08-06 15:29:52,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 233.4ms TimeCoverageRelationStatistics Valid=430, Invalid=830, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:29:52,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31130 states. [2021-08-06 15:29:53,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31130 to 23206. [2021-08-06 15:29:53,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23206 states, 23205 states have (on average 2.908554190907132) internal successors, (67493), 23205 states have internal predecessors, (67493), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:53,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23206 states to 23206 states and 67493 transitions. [2021-08-06 15:29:53,310 INFO L78 Accepts]: Start accepts. Automaton has 23206 states and 67493 transitions. Word has length 37 [2021-08-06 15:29:53,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:53,310 INFO L470 AbstractCegarLoop]: Abstraction has 23206 states and 67493 transitions. [2021-08-06 15:29:53,310 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.6153846153846154) internal successors, (47), 13 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:53,311 INFO L276 IsEmpty]: Start isEmpty. Operand 23206 states and 67493 transitions. [2021-08-06 15:29:53,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:29:53,339 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:53,340 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:53,361 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-06 15:29:53,540 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2021-08-06 15:29:53,540 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:53,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:53,540 INFO L82 PathProgramCache]: Analyzing trace with hash -2094528108, now seen corresponding path program 92 times [2021-08-06 15:29:53,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:53,541 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671893156] [2021-08-06 15:29:53,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:53,541 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:53,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:53,594 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:53,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:53,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671893156] [2021-08-06 15:29:53,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671893156] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:53,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777640465] [2021-08-06 15:29:53,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:29:53,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:53,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:53,595 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:29:53,596 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-06 15:29:55,784 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:29:55,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:55,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:29:55,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:55,993 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:55,993 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [777640465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:55,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:55,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 15:29:55,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523494081] [2021-08-06 15:29:55,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:29:55,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:55,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:29:55,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:29:55,994 INFO L87 Difference]: Start difference. First operand 23206 states and 67493 transitions. Second operand has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:56,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:29:56,420 INFO L93 Difference]: Finished difference Result 29544 states and 84782 transitions. [2021-08-06 15:29:56,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:29:56,420 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:29:56,420 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:29:56,487 INFO L225 Difference]: With dead ends: 29544 [2021-08-06 15:29:56,487 INFO L226 Difference]: Without dead ends: 29488 [2021-08-06 15:29:56,488 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 234.7ms TimeCoverageRelationStatistics Valid=373, Invalid=817, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 15:29:56,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29488 states. [2021-08-06 15:29:56,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29488 to 24042. [2021-08-06 15:29:56,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24042 states, 24041 states have (on average 2.9141466661120585) internal successors, (70059), 24041 states have internal predecessors, (70059), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:56,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24042 states to 24042 states and 70059 transitions. [2021-08-06 15:29:56,970 INFO L78 Accepts]: Start accepts. Automaton has 24042 states and 70059 transitions. Word has length 37 [2021-08-06 15:29:56,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:29:56,970 INFO L470 AbstractCegarLoop]: Abstraction has 24042 states and 70059 transitions. [2021-08-06 15:29:56,970 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.357142857142857) internal successors, (47), 14 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:29:56,970 INFO L276 IsEmpty]: Start isEmpty. Operand 24042 states and 70059 transitions. [2021-08-06 15:29:57,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:29:57,002 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:29:57,002 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:29:57,024 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-06 15:29:57,203 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:57,203 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:29:57,203 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:29:57,203 INFO L82 PathProgramCache]: Analyzing trace with hash -695123142, now seen corresponding path program 93 times [2021-08-06 15:29:57,203 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:29:57,203 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752818439] [2021-08-06 15:29:57,203 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:29:57,203 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:29:57,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:29:57,254 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:57,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:29:57,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752818439] [2021-08-06 15:29:57,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752818439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:57,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597594872] [2021-08-06 15:29:57,254 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:29:57,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:29:57,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:29:57,255 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:29:57,255 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-06 15:29:59,455 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:29:59,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:29:59,455 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:29:59,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:29:59,703 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:29:59,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597594872] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:29:59,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:29:59,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 15:29:59,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26467250] [2021-08-06 15:29:59,704 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:29:59,704 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:29:59,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:29:59,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:29:59,704 INFO L87 Difference]: Start difference. First operand 24042 states and 70059 transitions. Second operand has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:00,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:00,169 INFO L93 Difference]: Finished difference Result 30061 states and 86344 transitions. [2021-08-06 15:30:00,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:30:00,169 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:30:00,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:00,224 INFO L225 Difference]: With dead ends: 30061 [2021-08-06 15:30:00,224 INFO L226 Difference]: Without dead ends: 30049 [2021-08-06 15:30:00,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 269.5ms TimeCoverageRelationStatistics Valid=366, Invalid=894, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:30:00,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30049 states. [2021-08-06 15:30:00,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30049 to 25534. [2021-08-06 15:30:00,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25534 states, 25533 states have (on average 2.906708964868993) internal successors, (74217), 25533 states have internal predecessors, (74217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:00,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25534 states to 25534 states and 74217 transitions. [2021-08-06 15:30:00,727 INFO L78 Accepts]: Start accepts. Automaton has 25534 states and 74217 transitions. Word has length 37 [2021-08-06 15:30:00,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:00,727 INFO L470 AbstractCegarLoop]: Abstraction has 25534 states and 74217 transitions. [2021-08-06 15:30:00,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6666666666666665) internal successors, (55), 15 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:00,727 INFO L276 IsEmpty]: Start isEmpty. Operand 25534 states and 74217 transitions. [2021-08-06 15:30:00,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:30:00,760 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:00,760 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:00,781 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-06 15:30:00,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:00,960 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:00,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:00,960 INFO L82 PathProgramCache]: Analyzing trace with hash 1971123800, now seen corresponding path program 94 times [2021-08-06 15:30:00,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:00,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1089421945] [2021-08-06 15:30:00,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:00,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:01,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:01,096 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:01,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:01,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1089421945] [2021-08-06 15:30:01,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1089421945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:01,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133482023] [2021-08-06 15:30:01,096 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:30:01,096 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:01,097 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:01,097 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:30:01,098 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-06 15:30:03,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:30:03,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:03,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:30:03,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:03,477 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:03,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133482023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:03,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:03,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 15:30:03,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899017421] [2021-08-06 15:30:03,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:30:03,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:03,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:30:03,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:30:03,478 INFO L87 Difference]: Start difference. First operand 25534 states and 74217 transitions. Second operand has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:04,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:04,017 INFO L93 Difference]: Finished difference Result 36194 states and 103786 transitions. [2021-08-06 15:30:04,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 15:30:04,017 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:30:04,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:04,105 INFO L225 Difference]: With dead ends: 36194 [2021-08-06 15:30:04,105 INFO L226 Difference]: Without dead ends: 36188 [2021-08-06 15:30:04,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 284.2ms TimeCoverageRelationStatistics Valid=467, Invalid=1015, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 15:30:04,147 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36188 states. [2021-08-06 15:30:04,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36188 to 29604. [2021-08-06 15:30:04,687 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29604 states, 29603 states have (on average 2.912745329865216) internal successors, (86226), 29603 states have internal predecessors, (86226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:04,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29604 states to 29604 states and 86226 transitions. [2021-08-06 15:30:04,895 INFO L78 Accepts]: Start accepts. Automaton has 29604 states and 86226 transitions. Word has length 37 [2021-08-06 15:30:04,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:04,895 INFO L470 AbstractCegarLoop]: Abstraction has 29604 states and 86226 transitions. [2021-08-06 15:30:04,895 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.9285714285714284) internal successors, (55), 14 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:04,895 INFO L276 IsEmpty]: Start isEmpty. Operand 29604 states and 86226 transitions. [2021-08-06 15:30:04,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:30:04,942 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:04,942 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:05,110 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-06 15:30:05,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-06 15:30:05,142 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:05,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:05,143 INFO L82 PathProgramCache]: Analyzing trace with hash -844281862, now seen corresponding path program 95 times [2021-08-06 15:30:05,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:05,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495726633] [2021-08-06 15:30:05,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:05,143 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:05,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:05,200 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:05,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:05,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495726633] [2021-08-06 15:30:05,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495726633] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:05,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59943372] [2021-08-06 15:30:05,200 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:30:05,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:05,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:05,201 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:30:05,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-06 15:30:07,430 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:30:07,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:07,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:30:07,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:07,666 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:07,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59943372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:07,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:07,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-08-06 15:30:07,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466445961] [2021-08-06 15:30:07,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:30:07,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:07,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:30:07,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:30:07,667 INFO L87 Difference]: Start difference. First operand 29604 states and 86226 transitions. Second operand has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:08,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:08,262 INFO L93 Difference]: Finished difference Result 41937 states and 120606 transitions. [2021-08-06 15:30:08,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 15:30:08,262 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:30:08,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:08,431 INFO L225 Difference]: With dead ends: 41937 [2021-08-06 15:30:08,431 INFO L226 Difference]: Without dead ends: 41937 [2021-08-06 15:30:08,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 293.4ms TimeCoverageRelationStatistics Valid=546, Invalid=1014, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 15:30:08,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41937 states. [2021-08-06 15:30:08,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41937 to 35832. [2021-08-06 15:30:09,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35832 states, 35831 states have (on average 2.9105523150344674) internal successors, (104288), 35831 states have internal predecessors, (104288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:09,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35832 states to 35832 states and 104288 transitions. [2021-08-06 15:30:09,120 INFO L78 Accepts]: Start accepts. Automaton has 35832 states and 104288 transitions. Word has length 37 [2021-08-06 15:30:09,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:09,120 INFO L470 AbstractCegarLoop]: Abstraction has 35832 states and 104288 transitions. [2021-08-06 15:30:09,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 4.230769230769231) internal successors, (55), 13 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:09,121 INFO L276 IsEmpty]: Start isEmpty. Operand 35832 states and 104288 transitions. [2021-08-06 15:30:09,171 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:30:09,172 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:09,172 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:09,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-06 15:30:09,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:09,372 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:09,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:09,372 INFO L82 PathProgramCache]: Analyzing trace with hash -703198244, now seen corresponding path program 96 times [2021-08-06 15:30:09,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:09,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072740478] [2021-08-06 15:30:09,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:09,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:09,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:09,415 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:30:09,415 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:09,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072740478] [2021-08-06 15:30:09,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1072740478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:09,415 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266085902] [2021-08-06 15:30:09,415 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:30:09,415 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:09,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:09,416 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:30:09,417 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-06 15:30:11,776 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-06 15:30:11,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:11,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:30:11,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:12,014 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 11 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:12,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266085902] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:12,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:12,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 9] total 13 [2021-08-06 15:30:12,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238529641] [2021-08-06 15:30:12,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 15:30:12,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:12,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 15:30:12,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2021-08-06 15:30:12,015 INFO L87 Difference]: Start difference. First operand 35832 states and 104288 transitions. Second operand has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:12,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:12,581 INFO L93 Difference]: Finished difference Result 41300 states and 118909 transitions. [2021-08-06 15:30:12,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 15:30:12,582 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:30:12,582 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:12,674 INFO L225 Difference]: With dead ends: 41300 [2021-08-06 15:30:12,674 INFO L226 Difference]: Without dead ends: 41286 [2021-08-06 15:30:12,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 283.2ms TimeCoverageRelationStatistics Valid=466, Invalid=940, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:30:12,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41286 states. [2021-08-06 15:30:13,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41286 to 35320. [2021-08-06 15:30:13,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35320 states, 35319 states have (on average 2.9060845437300036) internal successors, (102640), 35319 states have internal predecessors, (102640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:13,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35320 states to 35320 states and 102640 transitions. [2021-08-06 15:30:13,474 INFO L78 Accepts]: Start accepts. Automaton has 35320 states and 102640 transitions. Word has length 37 [2021-08-06 15:30:13,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:13,474 INFO L470 AbstractCegarLoop]: Abstraction has 35320 states and 102640 transitions. [2021-08-06 15:30:13,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.8461538461538463) internal successors, (50), 13 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:13,475 INFO L276 IsEmpty]: Start isEmpty. Operand 35320 states and 102640 transitions. [2021-08-06 15:30:13,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:30:13,533 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:13,533 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:13,556 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-06 15:30:13,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-06 15:30:13,735 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:13,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:13,736 INFO L82 PathProgramCache]: Analyzing trace with hash -618799470, now seen corresponding path program 97 times [2021-08-06 15:30:13,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:13,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122654261] [2021-08-06 15:30:13,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:13,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:13,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:13,782 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 15:30:13,782 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:13,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122654261] [2021-08-06 15:30:13,782 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122654261] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:13,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311514186] [2021-08-06 15:30:13,782 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:30:13,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:13,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:13,783 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:30:13,784 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-06 15:30:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:16,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:30:16,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:16,575 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 10 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:16,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311514186] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:16,576 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:16,576 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 15:30:16,576 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1242722237] [2021-08-06 15:30:16,576 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 15:30:16,576 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:16,576 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 15:30:16,576 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2021-08-06 15:30:16,576 INFO L87 Difference]: Start difference. First operand 35320 states and 102640 transitions. Second operand has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:17,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:17,079 INFO L93 Difference]: Finished difference Result 41805 states and 120268 transitions. [2021-08-06 15:30:17,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 15:30:17,079 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:30:17,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:17,172 INFO L225 Difference]: With dead ends: 41805 [2021-08-06 15:30:17,172 INFO L226 Difference]: Without dead ends: 41749 [2021-08-06 15:30:17,172 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 248.1ms TimeCoverageRelationStatistics Valid=411, Invalid=921, Unknown=0, NotChecked=0, Total=1332 [2021-08-06 15:30:17,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41749 states. [2021-08-06 15:30:17,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41749 to 36324. [2021-08-06 15:30:17,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36324 states, 36323 states have (on average 2.9055970046526993) internal successors, (105540), 36323 states have internal predecessors, (105540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:17,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36324 states to 36324 states and 105540 transitions. [2021-08-06 15:30:17,974 INFO L78 Accepts]: Start accepts. Automaton has 36324 states and 105540 transitions. Word has length 37 [2021-08-06 15:30:17,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:17,974 INFO L470 AbstractCegarLoop]: Abstraction has 36324 states and 105540 transitions. [2021-08-06 15:30:17,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.5714285714285716) internal successors, (50), 14 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:17,974 INFO L276 IsEmpty]: Start isEmpty. Operand 36324 states and 105540 transitions. [2021-08-06 15:30:18,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-06 15:30:18,025 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:18,025 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:18,048 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-06 15:30:18,225 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-06 15:30:18,225 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:18,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:18,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1021238040, now seen corresponding path program 98 times [2021-08-06 15:30:18,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:18,226 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551856273] [2021-08-06 15:30:18,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:18,226 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:18,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:18,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:18,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551856273] [2021-08-06 15:30:18,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1551856273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:18,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152942518] [2021-08-06 15:30:18,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:30:18,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:18,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:18,284 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:30:18,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-06 15:30:20,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:30:20,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:20,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 15:30:20,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:20,950 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:20,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152942518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:20,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:20,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 15:30:20,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969393508] [2021-08-06 15:30:20,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 15:30:20,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:20,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 15:30:20,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2021-08-06 15:30:20,951 INFO L87 Difference]: Start difference. First operand 36324 states and 105540 transitions. Second operand has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:21,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:21,406 INFO L93 Difference]: Finished difference Result 42907 states and 123545 transitions. [2021-08-06 15:30:21,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:30:21,406 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-06 15:30:21,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:21,502 INFO L225 Difference]: With dead ends: 42907 [2021-08-06 15:30:21,502 INFO L226 Difference]: Without dead ends: 42809 [2021-08-06 15:30:21,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 227.8ms TimeCoverageRelationStatistics Valid=364, Invalid=896, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:30:21,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42809 states. [2021-08-06 15:30:22,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42809 to 37654. [2021-08-06 15:30:22,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37654 states, 37653 states have (on average 2.904708788144371) internal successors, (109371), 37653 states have internal predecessors, (109371), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:22,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37654 states to 37654 states and 109371 transitions. [2021-08-06 15:30:22,409 INFO L78 Accepts]: Start accepts. Automaton has 37654 states and 109371 transitions. Word has length 37 [2021-08-06 15:30:22,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:22,409 INFO L470 AbstractCegarLoop]: Abstraction has 37654 states and 109371 transitions. [2021-08-06 15:30:22,409 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.3333333333333335) internal successors, (50), 15 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:22,409 INFO L276 IsEmpty]: Start isEmpty. Operand 37654 states and 109371 transitions. [2021-08-06 15:30:22,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 15:30:22,464 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:22,464 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:22,486 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-06 15:30:22,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-08-06 15:30:22,665 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:22,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:22,665 INFO L82 PathProgramCache]: Analyzing trace with hash -815054478, now seen corresponding path program 99 times [2021-08-06 15:30:22,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:22,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467326628] [2021-08-06 15:30:22,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:22,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:22,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:22,954 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:22,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:22,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467326628] [2021-08-06 15:30:22,954 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467326628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:22,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [989636605] [2021-08-06 15:30:22,954 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:30:22,954 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:22,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:22,955 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:30:22,956 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-06 15:30:25,128 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 15:30:25,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:25,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:30:25,130 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:25,667 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-06 15:30:25,667 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 37 [2021-08-06 15:30:25,698 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:25,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [989636605] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:25,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:25,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-08-06 15:30:25,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999531074] [2021-08-06 15:30:25,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 15:30:25,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:25,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 15:30:25,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-08-06 15:30:25,699 INFO L87 Difference]: Start difference. First operand 37654 states and 109371 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:26,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:26,070 INFO L93 Difference]: Finished difference Result 53826 states and 156188 transitions. [2021-08-06 15:30:26,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 15:30:26,070 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 15:30:26,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:26,197 INFO L225 Difference]: With dead ends: 53826 [2021-08-06 15:30:26,197 INFO L226 Difference]: Without dead ends: 53788 [2021-08-06 15:30:26,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 297.7ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:30:26,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53788 states. [2021-08-06 15:30:26,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53788 to 37682. [2021-08-06 15:30:27,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37682 states, 37681 states have (on average 2.90414267137284) internal successors, (109431), 37681 states have internal predecessors, (109431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:27,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37682 states to 37682 states and 109431 transitions. [2021-08-06 15:30:27,137 INFO L78 Accepts]: Start accepts. Automaton has 37682 states and 109431 transitions. Word has length 40 [2021-08-06 15:30:27,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:27,137 INFO L470 AbstractCegarLoop]: Abstraction has 37682 states and 109431 transitions. [2021-08-06 15:30:27,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:27,137 INFO L276 IsEmpty]: Start isEmpty. Operand 37682 states and 109431 transitions. [2021-08-06 15:30:27,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 15:30:27,194 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:27,194 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:27,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-06 15:30:27,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:27,396 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:27,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:27,396 INFO L82 PathProgramCache]: Analyzing trace with hash 1377825018, now seen corresponding path program 100 times [2021-08-06 15:30:27,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:27,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684304204] [2021-08-06 15:30:27,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:27,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:27,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:27,589 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:27,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:27,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684304204] [2021-08-06 15:30:27,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684304204] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:27,590 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820127888] [2021-08-06 15:30:27,590 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:30:27,590 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:27,590 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:27,590 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:30:27,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-06 15:30:30,055 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:30:30,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:30,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:30:30,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:30,579 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:30:30,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 33 [2021-08-06 15:30:30,623 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:30,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820127888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:30,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:30,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-06 15:30:30,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792119053] [2021-08-06 15:30:30,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:30:30,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:30,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:30:30,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:30:30,625 INFO L87 Difference]: Start difference. First operand 37682 states and 109431 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:31,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:31,245 INFO L93 Difference]: Finished difference Result 61487 states and 178572 transitions. [2021-08-06 15:30:31,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:30:31,246 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 15:30:31,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:31,468 INFO L225 Difference]: With dead ends: 61487 [2021-08-06 15:30:31,468 INFO L226 Difference]: Without dead ends: 61405 [2021-08-06 15:30:31,468 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 311.7ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:30:31,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61405 states. [2021-08-06 15:30:32,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61405 to 44129. [2021-08-06 15:30:32,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44129 states, 44128 states have (on average 2.9096718636693257) internal successors, (128398), 44128 states have internal predecessors, (128398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:32,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44129 states to 44129 states and 128398 transitions. [2021-08-06 15:30:32,352 INFO L78 Accepts]: Start accepts. Automaton has 44129 states and 128398 transitions. Word has length 40 [2021-08-06 15:30:32,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:32,352 INFO L470 AbstractCegarLoop]: Abstraction has 44129 states and 128398 transitions. [2021-08-06 15:30:32,352 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:32,352 INFO L276 IsEmpty]: Start isEmpty. Operand 44129 states and 128398 transitions. [2021-08-06 15:30:32,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 15:30:32,415 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:32,415 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:32,437 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-08-06 15:30:32,616 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:32,616 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:32,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:32,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1973930934, now seen corresponding path program 101 times [2021-08-06 15:30:32,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:32,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1427951895] [2021-08-06 15:30:32,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:32,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:32,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:32,785 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:32,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:32,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1427951895] [2021-08-06 15:30:32,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1427951895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:32,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812114928] [2021-08-06 15:30:32,785 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:30:32,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:32,785 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:32,786 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:30:32,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-06 15:30:35,365 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 15:30:35,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:35,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:30:35,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:35,868 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:30:35,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:30:35,925 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:35,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812114928] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:35,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:35,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-06 15:30:35,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957052982] [2021-08-06 15:30:35,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:30:35,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:35,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:30:35,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:30:35,926 INFO L87 Difference]: Start difference. First operand 44129 states and 128398 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:36,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:36,605 INFO L93 Difference]: Finished difference Result 61471 states and 178534 transitions. [2021-08-06 15:30:36,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 15:30:36,605 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 15:30:36,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:36,762 INFO L225 Difference]: With dead ends: 61471 [2021-08-06 15:30:36,762 INFO L226 Difference]: Without dead ends: 61359 [2021-08-06 15:30:36,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 287.0ms TimeCoverageRelationStatistics Valid=105, Invalid=707, Unknown=0, NotChecked=0, Total=812 [2021-08-06 15:30:36,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61359 states. [2021-08-06 15:30:37,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61359 to 42975. [2021-08-06 15:30:37,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42975 states, 42974 states have (on average 2.9057336994461767) internal successors, (124871), 42974 states have internal predecessors, (124871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:37,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42975 states to 42975 states and 124871 transitions. [2021-08-06 15:30:37,761 INFO L78 Accepts]: Start accepts. Automaton has 42975 states and 124871 transitions. Word has length 40 [2021-08-06 15:30:37,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:37,761 INFO L470 AbstractCegarLoop]: Abstraction has 42975 states and 124871 transitions. [2021-08-06 15:30:37,761 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:37,761 INFO L276 IsEmpty]: Start isEmpty. Operand 42975 states and 124871 transitions. [2021-08-06 15:30:38,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 15:30:38,029 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:38,029 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:38,053 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-08-06 15:30:38,251 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-08-06 15:30:38,251 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:38,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:38,252 INFO L82 PathProgramCache]: Analyzing trace with hash 916407406, now seen corresponding path program 102 times [2021-08-06 15:30:38,252 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:38,252 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506223215] [2021-08-06 15:30:38,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:38,252 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:38,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:38,431 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:38,431 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:38,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506223215] [2021-08-06 15:30:38,431 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506223215] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:38,431 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1973559870] [2021-08-06 15:30:38,431 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:30:38,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:38,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:38,432 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:30:38,432 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-06 15:30:40,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:30:40,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:40,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:30:40,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:41,323 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:30:41,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2021-08-06 15:30:41,354 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:41,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1973559870] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:41,354 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:41,354 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-08-06 15:30:41,354 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1878917279] [2021-08-06 15:30:41,354 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:30:41,354 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:41,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:30:41,355 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=538, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:30:41,355 INFO L87 Difference]: Start difference. First operand 42975 states and 124871 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:42,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:42,317 INFO L93 Difference]: Finished difference Result 61721 states and 178788 transitions. [2021-08-06 15:30:42,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-06 15:30:42,317 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 15:30:42,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:42,462 INFO L225 Difference]: With dead ends: 61721 [2021-08-06 15:30:42,462 INFO L226 Difference]: Without dead ends: 61604 [2021-08-06 15:30:42,463 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 510.0ms TimeCoverageRelationStatistics Valid=150, Invalid=1410, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 15:30:42,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61604 states. [2021-08-06 15:30:43,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61604 to 43605. [2021-08-06 15:30:43,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43605 states, 43604 states have (on average 2.906338867993762) internal successors, (126728), 43604 states have internal predecessors, (126728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:43,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43605 states to 43605 states and 126728 transitions. [2021-08-06 15:30:43,519 INFO L78 Accepts]: Start accepts. Automaton has 43605 states and 126728 transitions. Word has length 40 [2021-08-06 15:30:43,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:43,520 INFO L470 AbstractCegarLoop]: Abstraction has 43605 states and 126728 transitions. [2021-08-06 15:30:43,520 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:43,520 INFO L276 IsEmpty]: Start isEmpty. Operand 43605 states and 126728 transitions. [2021-08-06 15:30:43,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 15:30:43,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:43,587 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:43,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-06 15:30:43,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:43,787 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:43,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:43,787 INFO L82 PathProgramCache]: Analyzing trace with hash 2094982228, now seen corresponding path program 103 times [2021-08-06 15:30:43,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:43,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723950805] [2021-08-06 15:30:43,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:43,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:43,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:43,968 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:43,968 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:43,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723950805] [2021-08-06 15:30:43,968 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723950805] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:43,968 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058380280] [2021-08-06 15:30:43,968 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:30:43,969 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:43,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:43,970 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:30:43,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-06 15:30:46,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:46,541 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:30:46,541 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:47,041 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:30:47,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:30:47,084 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:47,084 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058380280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:47,084 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:47,084 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-06 15:30:47,084 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094595303] [2021-08-06 15:30:47,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:30:47,085 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:47,085 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:30:47,085 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:30:47,085 INFO L87 Difference]: Start difference. First operand 43605 states and 126728 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:47,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:47,545 INFO L93 Difference]: Finished difference Result 61267 states and 177882 transitions. [2021-08-06 15:30:47,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:30:47,545 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 15:30:47,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:47,692 INFO L225 Difference]: With dead ends: 61267 [2021-08-06 15:30:47,692 INFO L226 Difference]: Without dead ends: 61191 [2021-08-06 15:30:47,692 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 217.2ms TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:30:47,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61191 states. [2021-08-06 15:30:48,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61191 to 44261. [2021-08-06 15:30:48,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44261 states, 44260 states have (on average 2.9074107546317216) internal successors, (128682), 44260 states have internal predecessors, (128682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:48,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44261 states to 44261 states and 128682 transitions. [2021-08-06 15:30:48,750 INFO L78 Accepts]: Start accepts. Automaton has 44261 states and 128682 transitions. Word has length 40 [2021-08-06 15:30:48,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:48,750 INFO L470 AbstractCegarLoop]: Abstraction has 44261 states and 128682 transitions. [2021-08-06 15:30:48,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:48,750 INFO L276 IsEmpty]: Start isEmpty. Operand 44261 states and 128682 transitions. [2021-08-06 15:30:48,814 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 15:30:48,814 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:48,814 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:48,836 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-06 15:30:49,014 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:49,015 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:49,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:49,015 INFO L82 PathProgramCache]: Analyzing trace with hash 1659859630, now seen corresponding path program 104 times [2021-08-06 15:30:49,015 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:49,015 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769254528] [2021-08-06 15:30:49,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:49,015 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:49,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:49,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:49,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769254528] [2021-08-06 15:30:49,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769254528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:49,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [791967561] [2021-08-06 15:30:49,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:30:49,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:49,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:49,205 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:30:49,205 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-06 15:30:51,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:30:51,863 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:51,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:30:51,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:52,252 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:30:52,252 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2021-08-06 15:30:52,284 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:52,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [791967561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:52,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:52,285 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-08-06 15:30:52,285 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306791195] [2021-08-06 15:30:52,285 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:30:52,285 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:52,285 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:30:52,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=542, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:30:52,285 INFO L87 Difference]: Start difference. First operand 44261 states and 128682 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:53,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:53,027 INFO L93 Difference]: Finished difference Result 61530 states and 178419 transitions. [2021-08-06 15:30:53,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 15:30:53,027 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 15:30:53,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:53,242 INFO L225 Difference]: With dead ends: 61530 [2021-08-06 15:30:53,242 INFO L226 Difference]: Without dead ends: 61492 [2021-08-06 15:30:53,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 483.2ms TimeCoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:30:53,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61492 states. [2021-08-06 15:30:53,996 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61492 to 44283. [2021-08-06 15:30:54,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44283 states, 44282 states have (on average 2.9074341718982883) internal successors, (128747), 44282 states have internal predecessors, (128747), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:54,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44283 states to 44283 states and 128747 transitions. [2021-08-06 15:30:54,164 INFO L78 Accepts]: Start accepts. Automaton has 44283 states and 128747 transitions. Word has length 40 [2021-08-06 15:30:54,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:54,164 INFO L470 AbstractCegarLoop]: Abstraction has 44283 states and 128747 transitions. [2021-08-06 15:30:54,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:54,165 INFO L276 IsEmpty]: Start isEmpty. Operand 44283 states and 128747 transitions. [2021-08-06 15:30:54,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 15:30:54,234 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:54,234 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:30:54,257 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-06 15:30:54,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:54,434 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:30:54,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:30:54,434 INFO L82 PathProgramCache]: Analyzing trace with hash -916120718, now seen corresponding path program 105 times [2021-08-06 15:30:54,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:30:54,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271429032] [2021-08-06 15:30:54,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:30:54,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:30:54,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:30:54,614 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:54,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:30:54,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271429032] [2021-08-06 15:30:54,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271429032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:54,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183759673] [2021-08-06 15:30:54,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:30:54,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:30:54,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:30:54,615 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:30:54,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-06 15:30:57,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-06 15:30:57,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:30:57,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:30:57,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:30:57,902 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:30:57,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 33 [2021-08-06 15:30:57,946 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:30:57,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183759673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:30:57,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:30:57,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 21 [2021-08-06 15:30:57,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066141504] [2021-08-06 15:30:57,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:30:57,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:30:57,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:30:57,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:30:57,947 INFO L87 Difference]: Start difference. First operand 44283 states and 128747 transitions. Second operand has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:58,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:30:58,663 INFO L93 Difference]: Finished difference Result 56563 states and 164364 transitions. [2021-08-06 15:30:58,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:30:58,663 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 15:30:58,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:30:58,789 INFO L225 Difference]: With dead ends: 56563 [2021-08-06 15:30:58,790 INFO L226 Difference]: Without dead ends: 56457 [2021-08-06 15:30:58,790 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 374.3ms TimeCoverageRelationStatistics Valid=115, Invalid=877, Unknown=0, NotChecked=0, Total=992 [2021-08-06 15:30:58,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56457 states. [2021-08-06 15:30:59,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56457 to 52795. [2021-08-06 15:30:59,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52795 states, 52794 states have (on average 2.919252187748608) internal successors, (154119), 52794 states have internal predecessors, (154119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:59,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52795 states to 52795 states and 154119 transitions. [2021-08-06 15:30:59,892 INFO L78 Accepts]: Start accepts. Automaton has 52795 states and 154119 transitions. Word has length 40 [2021-08-06 15:30:59,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:30:59,892 INFO L470 AbstractCegarLoop]: Abstraction has 52795 states and 154119 transitions. [2021-08-06 15:30:59,892 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.772727272727273) internal successors, (61), 21 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:30:59,892 INFO L276 IsEmpty]: Start isEmpty. Operand 52795 states and 154119 transitions. [2021-08-06 15:30:59,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 15:30:59,982 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:30:59,982 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:31:00,005 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-06 15:31:00,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-08-06 15:31:00,183 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:00,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:00,183 INFO L82 PathProgramCache]: Analyzing trace with hash 360383346, now seen corresponding path program 106 times [2021-08-06 15:31:00,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:00,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754457068] [2021-08-06 15:31:00,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:00,183 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:00,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:00,617 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:00,617 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:00,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754457068] [2021-08-06 15:31:00,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754457068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:00,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267235428] [2021-08-06 15:31:00,617 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:31:00,618 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:00,618 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:00,618 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:31:00,619 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-06 15:31:03,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:31:03,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:03,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:31:03,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:03,664 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:31:03,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:31:03,706 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:03,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1267235428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:03,706 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:03,706 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-08-06 15:31:03,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124139088] [2021-08-06 15:31:03,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:31:03,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:03,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:31:03,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:31:03,707 INFO L87 Difference]: Start difference. First operand 52795 states and 154119 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:04,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:04,211 INFO L93 Difference]: Finished difference Result 57562 states and 167245 transitions. [2021-08-06 15:31:04,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 15:31:04,212 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 15:31:04,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:04,415 INFO L225 Difference]: With dead ends: 57562 [2021-08-06 15:31:04,415 INFO L226 Difference]: Without dead ends: 57438 [2021-08-06 15:31:04,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 272.8ms TimeCoverageRelationStatistics Valid=96, Invalid=606, Unknown=0, NotChecked=0, Total=702 [2021-08-06 15:31:04,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57438 states. [2021-08-06 15:31:05,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57438 to 51595. [2021-08-06 15:31:05,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51595 states, 51594 states have (on average 2.9149319688335855) internal successors, (150393), 51594 states have internal predecessors, (150393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:05,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51595 states to 51595 states and 150393 transitions. [2021-08-06 15:31:05,503 INFO L78 Accepts]: Start accepts. Automaton has 51595 states and 150393 transitions. Word has length 40 [2021-08-06 15:31:05,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:05,504 INFO L470 AbstractCegarLoop]: Abstraction has 51595 states and 150393 transitions. [2021-08-06 15:31:05,504 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:05,504 INFO L276 IsEmpty]: Start isEmpty. Operand 51595 states and 150393 transitions. [2021-08-06 15:31:05,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 15:31:05,591 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:05,591 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:31:05,614 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Forceful destruction successful, exit code 0 [2021-08-06 15:31:05,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-08-06 15:31:05,792 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:05,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:05,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1910988602, now seen corresponding path program 107 times [2021-08-06 15:31:05,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:05,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097066227] [2021-08-06 15:31:05,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:05,793 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:06,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:06,203 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:06,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:06,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097066227] [2021-08-06 15:31:06,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097066227] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:06,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408647082] [2021-08-06 15:31:06,203 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:31:06,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:06,204 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:06,204 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:31:06,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-06 15:31:08,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:31:08,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:08,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:31:08,803 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:09,328 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:31:09,329 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:31:09,363 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:09,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408647082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:09,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:09,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-08-06 15:31:09,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996032541] [2021-08-06 15:31:09,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:31:09,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:09,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:31:09,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:31:09,363 INFO L87 Difference]: Start difference. First operand 51595 states and 150393 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:09,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:09,897 INFO L93 Difference]: Finished difference Result 55561 states and 161164 transitions. [2021-08-06 15:31:09,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:31:09,898 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 15:31:09,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:10,026 INFO L225 Difference]: With dead ends: 55561 [2021-08-06 15:31:10,026 INFO L226 Difference]: Without dead ends: 55437 [2021-08-06 15:31:10,026 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 254.7ms TimeCoverageRelationStatistics Valid=82, Invalid=518, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:31:10,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55437 states. [2021-08-06 15:31:10,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55437 to 50887. [2021-08-06 15:31:10,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50887 states, 50886 states have (on average 2.9142986283064105) internal successors, (148297), 50886 states have internal predecessors, (148297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:11,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50887 states to 50887 states and 148297 transitions. [2021-08-06 15:31:11,180 INFO L78 Accepts]: Start accepts. Automaton has 50887 states and 148297 transitions. Word has length 40 [2021-08-06 15:31:11,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:11,180 INFO L470 AbstractCegarLoop]: Abstraction has 50887 states and 148297 transitions. [2021-08-06 15:31:11,180 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:11,181 INFO L276 IsEmpty]: Start isEmpty. Operand 50887 states and 148297 transitions. [2021-08-06 15:31:11,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 15:31:11,258 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:11,258 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:31:11,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-06 15:31:11,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-08-06 15:31:11,460 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:11,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:11,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1266877938, now seen corresponding path program 108 times [2021-08-06 15:31:11,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:11,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696219944] [2021-08-06 15:31:11,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:11,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:11,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:11,649 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:11,649 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:11,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696219944] [2021-08-06 15:31:11,649 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696219944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:11,649 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1809575505] [2021-08-06 15:31:11,649 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:31:11,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:11,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:11,650 INFO L229 MonitoredProcess]: Starting monitored process 113 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:31:11,651 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-08-06 15:31:14,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:31:14,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:14,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:31:14,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:14,841 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:31:14,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:31:14,883 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:14,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1809575505] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:14,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:14,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 19 [2021-08-06 15:31:14,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379560451] [2021-08-06 15:31:14,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:31:14,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:14,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:31:14,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:31:14,884 INFO L87 Difference]: Start difference. First operand 50887 states and 148297 transitions. Second operand has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:15,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:15,380 INFO L93 Difference]: Finished difference Result 54386 states and 157811 transitions. [2021-08-06 15:31:15,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:31:15,381 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 15:31:15,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:15,540 INFO L225 Difference]: With dead ends: 54386 [2021-08-06 15:31:15,540 INFO L226 Difference]: Without dead ends: 54310 [2021-08-06 15:31:15,540 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:31:15,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54310 states. [2021-08-06 15:31:16,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54310 to 50291. [2021-08-06 15:31:16,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50291 states, 50290 states have (on average 2.913481805527938) internal successors, (146519), 50290 states have internal predecessors, (146519), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:16,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50291 states to 50291 states and 146519 transitions. [2021-08-06 15:31:16,593 INFO L78 Accepts]: Start accepts. Automaton has 50291 states and 146519 transitions. Word has length 40 [2021-08-06 15:31:16,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:16,594 INFO L470 AbstractCegarLoop]: Abstraction has 50291 states and 146519 transitions. [2021-08-06 15:31:16,594 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.05) internal successors, (61), 19 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:16,594 INFO L276 IsEmpty]: Start isEmpty. Operand 50291 states and 146519 transitions. [2021-08-06 15:31:16,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 15:31:16,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:16,668 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:31:16,694 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-08-06 15:31:16,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-08-06 15:31:16,869 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:16,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:16,869 INFO L82 PathProgramCache]: Analyzing trace with hash -1815002054, now seen corresponding path program 109 times [2021-08-06 15:31:16,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:16,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1599158281] [2021-08-06 15:31:16,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:16,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:16,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:17,064 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:17,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:17,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1599158281] [2021-08-06 15:31:17,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1599158281] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:17,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1783789831] [2021-08-06 15:31:17,065 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:31:17,065 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:17,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:17,065 INFO L229 MonitoredProcess]: Starting monitored process 114 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:31:17,066 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-08-06 15:31:19,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:19,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:31:19,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:20,381 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:31:20,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:31:20,421 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:20,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1783789831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:20,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:20,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 20 [2021-08-06 15:31:20,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468154075] [2021-08-06 15:31:20,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:31:20,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:20,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:31:20,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=366, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:31:20,422 INFO L87 Difference]: Start difference. First operand 50291 states and 146519 transitions. Second operand has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:20,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:20,883 INFO L93 Difference]: Finished difference Result 54366 states and 157749 transitions. [2021-08-06 15:31:20,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:31:20,884 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 15:31:20,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:21,006 INFO L225 Difference]: With dead ends: 54366 [2021-08-06 15:31:21,006 INFO L226 Difference]: Without dead ends: 54290 [2021-08-06 15:31:21,006 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 227.6ms TimeCoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:31:21,057 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54290 states. [2021-08-06 15:31:21,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54290 to 50899. [2021-08-06 15:31:22,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50899 states, 50898 states have (on average 2.913945538135094) internal successors, (148314), 50898 states have internal predecessors, (148314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:22,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50899 states to 50899 states and 148314 transitions. [2021-08-06 15:31:22,120 INFO L78 Accepts]: Start accepts. Automaton has 50899 states and 148314 transitions. Word has length 40 [2021-08-06 15:31:22,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:22,120 INFO L470 AbstractCegarLoop]: Abstraction has 50899 states and 148314 transitions. [2021-08-06 15:31:22,120 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9047619047619047) internal successors, (61), 20 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:22,120 INFO L276 IsEmpty]: Start isEmpty. Operand 50899 states and 148314 transitions. [2021-08-06 15:31:22,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 15:31:22,188 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:22,188 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:31:22,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Ended with exit code 0 [2021-08-06 15:31:22,391 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:22,392 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:22,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:22,392 INFO L82 PathProgramCache]: Analyzing trace with hash -2112020486, now seen corresponding path program 110 times [2021-08-06 15:31:22,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:22,392 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2048281136] [2021-08-06 15:31:22,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:22,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:22,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:22,571 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:22,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:22,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2048281136] [2021-08-06 15:31:22,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2048281136] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:22,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12413599] [2021-08-06 15:31:22,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:31:22,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:22,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:22,572 INFO L229 MonitoredProcess]: Starting monitored process 115 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:31:22,572 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-08-06 15:31:25,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:31:25,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:25,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:31:25,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:25,774 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:31:25,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2021-08-06 15:31:25,805 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:25,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12413599] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:25,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:25,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-08-06 15:31:25,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207024506] [2021-08-06 15:31:25,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:31:25,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:25,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:31:25,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:31:25,806 INFO L87 Difference]: Start difference. First operand 50899 states and 148314 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:26,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:26,622 INFO L93 Difference]: Finished difference Result 57635 states and 168077 transitions. [2021-08-06 15:31:26,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 15:31:26,622 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 15:31:26,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:26,760 INFO L225 Difference]: With dead ends: 57635 [2021-08-06 15:31:26,760 INFO L226 Difference]: Without dead ends: 57513 [2021-08-06 15:31:26,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 474.2ms TimeCoverageRelationStatistics Valid=140, Invalid=1266, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 15:31:26,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57513 states. [2021-08-06 15:31:27,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57513 to 56897. [2021-08-06 15:31:27,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56897 states, 56896 states have (on average 2.92415987064117) internal successors, (166373), 56896 states have internal predecessors, (166373), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:28,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56897 states to 56897 states and 166373 transitions. [2021-08-06 15:31:28,003 INFO L78 Accepts]: Start accepts. Automaton has 56897 states and 166373 transitions. Word has length 40 [2021-08-06 15:31:28,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:28,003 INFO L470 AbstractCegarLoop]: Abstraction has 56897 states and 166373 transitions. [2021-08-06 15:31:28,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:28,003 INFO L276 IsEmpty]: Start isEmpty. Operand 56897 states and 166373 transitions. [2021-08-06 15:31:28,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 15:31:28,106 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:28,106 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:31:28,129 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-08-06 15:31:28,307 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:28,307 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:28,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:28,308 INFO L82 PathProgramCache]: Analyzing trace with hash 960016374, now seen corresponding path program 111 times [2021-08-06 15:31:28,308 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:28,308 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353008348] [2021-08-06 15:31:28,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:28,308 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:28,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:28,724 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:28,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:28,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353008348] [2021-08-06 15:31:28,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353008348] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:28,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274576996] [2021-08-06 15:31:28,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:31:28,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:28,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:28,726 INFO L229 MonitoredProcess]: Starting monitored process 116 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:31:28,726 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-08-06 15:31:31,512 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-06 15:31:31,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:31,513 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:31:31,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:32,062 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:31:32,062 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:31:32,116 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:32,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274576996] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:32,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:32,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-08-06 15:31:32,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202476607] [2021-08-06 15:31:32,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:31:32,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:32,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:31:32,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:31:32,117 INFO L87 Difference]: Start difference. First operand 56897 states and 166373 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:32,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:32,687 INFO L93 Difference]: Finished difference Result 58288 states and 170073 transitions. [2021-08-06 15:31:32,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 15:31:32,687 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 15:31:32,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:32,824 INFO L225 Difference]: With dead ends: 58288 [2021-08-06 15:31:32,825 INFO L226 Difference]: Without dead ends: 58158 [2021-08-06 15:31:32,825 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 250.2ms TimeCoverageRelationStatistics Valid=87, Invalid=513, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:31:32,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58158 states. [2021-08-06 15:31:33,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58158 to 52473. [2021-08-06 15:31:33,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52473 states, 52472 states have (on average 2.9211579509071504) internal successors, (153279), 52472 states have internal predecessors, (153279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:33,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52473 states to 52473 states and 153279 transitions. [2021-08-06 15:31:33,877 INFO L78 Accepts]: Start accepts. Automaton has 52473 states and 153279 transitions. Word has length 40 [2021-08-06 15:31:33,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:33,878 INFO L470 AbstractCegarLoop]: Abstraction has 52473 states and 153279 transitions. [2021-08-06 15:31:33,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:33,878 INFO L276 IsEmpty]: Start isEmpty. Operand 52473 states and 153279 transitions. [2021-08-06 15:31:33,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 15:31:33,962 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:33,962 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:31:33,985 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-08-06 15:31:34,163 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-08-06 15:31:34,163 INFO L402 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:34,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:34,163 INFO L82 PathProgramCache]: Analyzing trace with hash 1355811532, now seen corresponding path program 112 times [2021-08-06 15:31:34,163 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:34,163 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1918911427] [2021-08-06 15:31:34,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:34,163 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:34,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:34,329 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:34,329 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:34,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1918911427] [2021-08-06 15:31:34,329 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1918911427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:34,329 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [480898063] [2021-08-06 15:31:34,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 15:31:34,329 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:34,329 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:34,330 INFO L229 MonitoredProcess]: Starting monitored process 117 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:31:34,356 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-08-06 15:31:37,360 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 15:31:37,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:37,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:31:37,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:37,892 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:31:37,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:31:37,945 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:37,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [480898063] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:37,946 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:37,946 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 13] total 19 [2021-08-06 15:31:37,946 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267667034] [2021-08-06 15:31:37,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 15:31:37,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:37,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 15:31:37,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-08-06 15:31:37,946 INFO L87 Difference]: Start difference. First operand 52473 states and 153279 transitions. Second operand has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:38,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:38,415 INFO L93 Difference]: Finished difference Result 53321 states and 155327 transitions. [2021-08-06 15:31:38,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:31:38,415 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 15:31:38,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:38,540 INFO L225 Difference]: With dead ends: 53321 [2021-08-06 15:31:38,541 INFO L226 Difference]: Without dead ends: 53204 [2021-08-06 15:31:38,541 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 234.9ms TimeCoverageRelationStatistics Valid=78, Invalid=474, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:31:38,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53204 states. [2021-08-06 15:31:39,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53204 to 51075. [2021-08-06 15:31:39,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51075 states, 51074 states have (on average 2.920350863453029) internal successors, (149154), 51074 states have internal predecessors, (149154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:39,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51075 states to 51075 states and 149154 transitions. [2021-08-06 15:31:39,540 INFO L78 Accepts]: Start accepts. Automaton has 51075 states and 149154 transitions. Word has length 40 [2021-08-06 15:31:39,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:39,540 INFO L470 AbstractCegarLoop]: Abstraction has 51075 states and 149154 transitions. [2021-08-06 15:31:39,540 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.2) internal successors, (64), 19 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:39,540 INFO L276 IsEmpty]: Start isEmpty. Operand 51075 states and 149154 transitions. [2021-08-06 15:31:39,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 15:31:39,613 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:39,613 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:31:39,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Forceful destruction successful, exit code 0 [2021-08-06 15:31:39,814 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,117 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:39,814 INFO L402 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:39,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:39,814 INFO L82 PathProgramCache]: Analyzing trace with hash -741472108, now seen corresponding path program 113 times [2021-08-06 15:31:39,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:39,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568883382] [2021-08-06 15:31:39,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:39,815 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:39,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:40,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:40,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568883382] [2021-08-06 15:31:40,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568883382] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:40,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623016376] [2021-08-06 15:31:40,201 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 15:31:40,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:40,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:40,202 INFO L229 MonitoredProcess]: Starting monitored process 118 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:31:40,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-08-06 15:31:43,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-06 15:31:43,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:43,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:31:43,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:43,616 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:31:43,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:31:43,668 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:43,669 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623016376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:43,669 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:43,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-08-06 15:31:43,669 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784702085] [2021-08-06 15:31:43,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:31:43,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:43,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:31:43,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=362, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:31:43,669 INFO L87 Difference]: Start difference. First operand 51075 states and 149154 transitions. Second operand has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:44,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:44,171 INFO L93 Difference]: Finished difference Result 53291 states and 155408 transitions. [2021-08-06 15:31:44,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:31:44,171 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 15:31:44,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:44,315 INFO L225 Difference]: With dead ends: 53291 [2021-08-06 15:31:44,315 INFO L226 Difference]: Without dead ends: 53215 [2021-08-06 15:31:44,315 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 459.3ms TimeCoverageRelationStatistics Valid=73, Invalid=479, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:31:44,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53215 states. [2021-08-06 15:31:45,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53215 to 50481. [2021-08-06 15:31:45,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50481 states, 50480 states have (on average 2.9226426307448494) internal successors, (147535), 50480 states have internal predecessors, (147535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:45,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50481 states to 50481 states and 147535 transitions. [2021-08-06 15:31:45,460 INFO L78 Accepts]: Start accepts. Automaton has 50481 states and 147535 transitions. Word has length 40 [2021-08-06 15:31:45,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:45,460 INFO L470 AbstractCegarLoop]: Abstraction has 50481 states and 147535 transitions. [2021-08-06 15:31:45,461 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0476190476190474) internal successors, (64), 20 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:45,461 INFO L276 IsEmpty]: Start isEmpty. Operand 50481 states and 147535 transitions. [2021-08-06 15:31:45,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 15:31:45,723 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:45,723 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:31:45,748 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-08-06 15:31:45,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,118 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:45,934 INFO L402 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:45,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:45,934 INFO L82 PathProgramCache]: Analyzing trace with hash 805083532, now seen corresponding path program 114 times [2021-08-06 15:31:45,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:45,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751715740] [2021-08-06 15:31:45,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:45,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:45,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:46,107 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 15:31:46,107 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:46,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751715740] [2021-08-06 15:31:46,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751715740] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:46,107 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21976177] [2021-08-06 15:31:46,107 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 15:31:46,107 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:46,107 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:46,108 INFO L229 MonitoredProcess]: Starting monitored process 119 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:31:46,108 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-08-06 15:31:48,977 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 15:31:48,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:31:48,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:31:48,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:49,542 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:31:49,542 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:31:49,583 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:49,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21976177] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:49,584 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:49,584 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 20 [2021-08-06 15:31:49,584 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626287718] [2021-08-06 15:31:49,584 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 15:31:49,584 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:49,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 15:31:49,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-08-06 15:31:49,584 INFO L87 Difference]: Start difference. First operand 50481 states and 147535 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:50,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:50,121 INFO L93 Difference]: Finished difference Result 51763 states and 151105 transitions. [2021-08-06 15:31:50,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 15:31:50,122 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 15:31:50,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:50,260 INFO L225 Difference]: With dead ends: 51763 [2021-08-06 15:31:50,260 INFO L226 Difference]: Without dead ends: 51687 [2021-08-06 15:31:50,260 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 225.3ms TimeCoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-08-06 15:31:50,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51687 states. [2021-08-06 15:31:51,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51687 to 51357. [2021-08-06 15:31:51,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51357 states, 51356 states have (on average 2.924429472700366) internal successors, (150187), 51356 states have internal predecessors, (150187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:51,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51357 states to 51357 states and 150187 transitions. [2021-08-06 15:31:51,306 INFO L78 Accepts]: Start accepts. Automaton has 51357 states and 150187 transitions. Word has length 40 [2021-08-06 15:31:51,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:51,306 INFO L470 AbstractCegarLoop]: Abstraction has 51357 states and 150187 transitions. [2021-08-06 15:31:51,306 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:51,306 INFO L276 IsEmpty]: Start isEmpty. Operand 51357 states and 150187 transitions. [2021-08-06 15:31:51,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 15:31:51,601 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:51,601 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:31:51,636 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Forceful destruction successful, exit code 0 [2021-08-06 15:31:51,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,119 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:51,821 INFO L402 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:51,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:51,821 INFO L82 PathProgramCache]: Analyzing trace with hash -2029136436, now seen corresponding path program 115 times [2021-08-06 15:31:51,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:51,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579260420] [2021-08-06 15:31:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:51,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:51,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:52,014 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:52,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:52,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579260420] [2021-08-06 15:31:52,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [579260420] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:52,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021337717] [2021-08-06 15:31:52,014 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 15:31:52,014 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:52,014 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:52,021 INFO L229 MonitoredProcess]: Starting monitored process 120 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:31:52,028 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-08-06 15:31:54,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:54,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 15:31:54,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:31:55,524 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:31:55,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-06 15:31:55,572 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:55,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2021337717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:55,572 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:31:55,572 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 21 [2021-08-06 15:31:55,572 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648681369] [2021-08-06 15:31:55,572 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 15:31:55,572 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:31:55,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 15:31:55,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2021-08-06 15:31:55,573 INFO L87 Difference]: Start difference. First operand 51357 states and 150187 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:56,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:31:56,102 INFO L93 Difference]: Finished difference Result 51807 states and 151188 transitions. [2021-08-06 15:31:56,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 15:31:56,102 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 15:31:56,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:31:56,237 INFO L225 Difference]: With dead ends: 51807 [2021-08-06 15:31:56,237 INFO L226 Difference]: Without dead ends: 51731 [2021-08-06 15:31:56,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 241.2ms TimeCoverageRelationStatistics Valid=68, Invalid=484, Unknown=0, NotChecked=0, Total=552 [2021-08-06 15:31:56,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51731 states. [2021-08-06 15:31:57,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51731 to 51351. [2021-08-06 15:31:57,266 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51351 states, 51350 states have (on average 2.924479065238559) internal successors, (150172), 51350 states have internal predecessors, (150172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:57,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51351 states to 51351 states and 150172 transitions. [2021-08-06 15:31:57,427 INFO L78 Accepts]: Start accepts. Automaton has 51351 states and 150172 transitions. Word has length 40 [2021-08-06 15:31:57,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:31:57,427 INFO L470 AbstractCegarLoop]: Abstraction has 51351 states and 150172 transitions. [2021-08-06 15:31:57,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 21 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:31:57,428 INFO L276 IsEmpty]: Start isEmpty. Operand 51351 states and 150172 transitions. [2021-08-06 15:31:57,519 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 15:31:57,520 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:31:57,520 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:31:57,545 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Forceful destruction successful, exit code 0 [2021-08-06 15:31:57,732 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,120 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:57,733 INFO L402 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:31:57,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:31:57,733 INFO L82 PathProgramCache]: Analyzing trace with hash 1886678642, now seen corresponding path program 116 times [2021-08-06 15:31:57,733 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:31:57,733 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82429485] [2021-08-06 15:31:57,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:31:57,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:31:57,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:31:57,957 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:31:57,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:31:57,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82429485] [2021-08-06 15:31:57,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82429485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:31:57,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839149171] [2021-08-06 15:31:57,958 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 15:31:57,958 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:31:57,958 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:31:57,958 INFO L229 MonitoredProcess]: Starting monitored process 121 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:31:57,959 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-08-06 15:32:01,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 15:32:01,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 15:32:01,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-06 15:32:01,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 15:32:01,517 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-06 15:32:01,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 46 treesize of output 26 [2021-08-06 15:32:01,556 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:01,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839149171] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:01,556 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 15:32:01,557 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 25 [2021-08-06 15:32:01,557 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514097371] [2021-08-06 15:32:01,557 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-06 15:32:01,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 15:32:01,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-06 15:32:01,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=541, Unknown=0, NotChecked=0, Total=600 [2021-08-06 15:32:01,557 INFO L87 Difference]: Start difference. First operand 51351 states and 150172 transitions. Second operand has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:02,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 15:32:02,334 INFO L93 Difference]: Finished difference Result 60681 states and 177304 transitions. [2021-08-06 15:32:02,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 15:32:02,334 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-06 15:32:02,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 15:32:02,513 INFO L225 Difference]: With dead ends: 60681 [2021-08-06 15:32:02,513 INFO L226 Difference]: Without dead ends: 60579 [2021-08-06 15:32:02,514 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 481.9ms TimeCoverageRelationStatistics Valid=124, Invalid=1136, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 15:32:02,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60579 states. [2021-08-06 15:32:03,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60579 to 60113. [2021-08-06 15:32:03,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60113 states, 60112 states have (on average 2.927751530476444) internal successors, (175993), 60112 states have internal predecessors, (175993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:03,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60113 states to 60113 states and 175993 transitions. [2021-08-06 15:32:03,910 INFO L78 Accepts]: Start accepts. Automaton has 60113 states and 175993 transitions. Word has length 40 [2021-08-06 15:32:03,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 15:32:03,911 INFO L470 AbstractCegarLoop]: Abstraction has 60113 states and 175993 transitions. [2021-08-06 15:32:03,911 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.92) internal successors, (73), 25 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 15:32:03,911 INFO L276 IsEmpty]: Start isEmpty. Operand 60113 states and 175993 transitions. [2021-08-06 15:32:04,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-06 15:32:04,021 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 15:32:04,021 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 15:32:04,046 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-08-06 15:32:04,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2021-08-06 15:32:04,222 INFO L402 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 15:32:04,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 15:32:04,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1858569458, now seen corresponding path program 117 times [2021-08-06 15:32:04,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 15:32:04,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420478886] [2021-08-06 15:32:04,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 15:32:04,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 15:32:04,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 15:32:04,608 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 15:32:04,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 15:32:04,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420478886] [2021-08-06 15:32:04,608 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420478886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 15:32:04,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431469008] [2021-08-06 15:32:04,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 15:32:04,608 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 15:32:04,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 15:32:04,613 INFO L229 MonitoredProcess]: Starting monitored process 122 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 15:32:04,613 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process