/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun-alt.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-8a14012e553caa636f65c1137831746b6d9875cd-8a14012 [2021-08-06 20:32:18,314 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-06 20:32:18,316 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-06 20:32:18,353 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-06 20:32:18,353 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-06 20:32:18,356 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-06 20:32:18,358 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-06 20:32:18,363 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-06 20:32:18,365 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-06 20:32:18,369 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-06 20:32:18,370 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-06 20:32:18,371 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-06 20:32:18,371 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-06 20:32:18,373 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-06 20:32:18,374 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-06 20:32:18,377 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-06 20:32:18,378 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-06 20:32:18,380 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-06 20:32:18,382 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-06 20:32:18,389 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-06 20:32:18,393 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-06 20:32:18,394 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-06 20:32:18,395 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-06 20:32:18,397 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-06 20:32:18,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-06 20:32:18,408 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-06 20:32:18,409 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-06 20:32:18,410 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-06 20:32:18,411 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-06 20:32:18,412 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-06 20:32:18,412 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-06 20:32:18,412 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-06 20:32:18,413 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-06 20:32:18,413 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-06 20:32:18,413 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-06 20:32:18,414 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-06 20:32:18,418 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-06 20:32:18,446 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-06 20:32:18,446 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-06 20:32:18,449 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-06 20:32:18,449 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-06 20:32:18,449 INFO L138 SettingsManager]: * Use SBE=true [2021-08-06 20:32:18,449 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-06 20:32:18,450 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-06 20:32:18,450 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-06 20:32:18,450 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-06 20:32:18,450 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-06 20:32:18,451 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-06 20:32:18,451 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-06 20:32:18,451 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-06 20:32:18,451 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-06 20:32:18,451 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-06 20:32:18,451 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-06 20:32:18,452 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-06 20:32:18,452 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-06 20:32:18,452 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-06 20:32:18,452 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-06 20:32:18,452 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-06 20:32:18,452 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:32:18,453 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-06 20:32:18,453 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-06 20:32:18,453 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-06 20:32:18,453 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-06 20:32:18,453 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-06 20:32:18,453 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-06 20:32:18,453 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-06 20:32:18,454 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-06 20:32:18,454 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-06 20:32:18,768 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-06 20:32:18,784 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-06 20:32:18,786 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-06 20:32:18,787 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-06 20:32:18,788 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-06 20:32:18,789 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun-alt.wvr.bpl [2021-08-06 20:32:18,789 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun-alt.wvr.bpl' [2021-08-06 20:32:18,829 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-06 20:32:18,830 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-06 20:32:18,832 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-06 20:32:18,832 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-06 20:32:18,832 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-06 20:32:18,843 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:32:18" (1/1) ... [2021-08-06 20:32:18,850 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:32:18" (1/1) ... [2021-08-06 20:32:18,861 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-06 20:32:18,863 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-06 20:32:18,863 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-06 20:32:18,863 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-06 20:32:18,870 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:32:18" (1/1) ... [2021-08-06 20:32:18,870 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:32:18" (1/1) ... [2021-08-06 20:32:18,872 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:32:18" (1/1) ... [2021-08-06 20:32:18,872 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:32:18" (1/1) ... [2021-08-06 20:32:18,876 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:32:18" (1/1) ... [2021-08-06 20:32:18,880 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:32:18" (1/1) ... [2021-08-06 20:32:18,881 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:32:18" (1/1) ... [2021-08-06 20:32:18,886 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-06 20:32:18,888 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-06 20:32:18,888 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-06 20:32:18,888 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-06 20:32:18,889 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:32:18" (1/1) ... [2021-08-06 20:32:18,895 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-06 20:32:18,903 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:18,918 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 20:32:18,925 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 20:32:18,952 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-06 20:32:18,952 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-06 20:32:18,953 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-06 20:32:18,953 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-06 20:32:18,953 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-06 20:32:18,953 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-06 20:32:18,953 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-06 20:32:18,953 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-06 20:32:18,953 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-06 20:32:18,954 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-06 20:32:18,954 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-06 20:32:18,954 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-06 20:32:18,954 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 20:32:19,167 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-06 20:32:19,167 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-06 20:32:19,169 INFO L202 PluginConnector]: Adding new model min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:32:19 BoogieIcfgContainer [2021-08-06 20:32:19,169 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-06 20:32:19,171 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-06 20:32:19,171 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-06 20:32:19,173 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-06 20:32:19,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 06.08 08:32:18" (1/2) ... [2021-08-06 20:32:19,174 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f960938 and model type min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.08 08:32:19, skipping insertion in model container [2021-08-06 20:32:19,174 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.08 08:32:19" (2/2) ... [2021-08-06 20:32:19,176 INFO L111 eAbstractionObserver]: Analyzing ICFG min-fun-alt.wvr.bpl [2021-08-06 20:32:19,180 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-06 20:32:19,180 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-06 20:32:19,180 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-06 20:32:19,180 INFO L509 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-06 20:32:19,252 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-06 20:32:19,290 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == ULTIMATE.start ======== [2021-08-06 20:32:19,295 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 20:32:19,295 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-06 20:32:19,383 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 79 states have (on average 1.7468354430379747) internal successors, (138), 111 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:19,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-06 20:32:19,394 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:19,394 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:19,395 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:19,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:19,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1204265674, now seen corresponding path program 1 times [2021-08-06 20:32:19,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:19,413 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249506549] [2021-08-06 20:32:19,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:19,415 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:19,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:19,619 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 20:32:19,620 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:19,620 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249506549] [2021-08-06 20:32:19,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [249506549] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:32:19,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:32:19,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-06 20:32:19,623 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [432316202] [2021-08-06 20:32:19,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-06 20:32:19,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:19,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-06 20:32:19,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:32:19,642 INFO L87 Difference]: Start difference. First operand has 112 states, 79 states have (on average 1.7468354430379747) internal successors, (138), 111 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:19,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:19,667 INFO L93 Difference]: Finished difference Result 217 states and 269 transitions. [2021-08-06 20:32:19,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-06 20:32:19,669 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-06 20:32:19,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:19,676 INFO L225 Difference]: With dead ends: 217 [2021-08-06 20:32:19,676 INFO L226 Difference]: Without dead ends: 64 [2021-08-06 20:32:19,677 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 13.0ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-06 20:32:19,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-06 20:32:19,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2021-08-06 20:32:19,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:19,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 74 transitions. [2021-08-06 20:32:19,706 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 74 transitions. Word has length 18 [2021-08-06 20:32:19,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:19,706 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 74 transitions. [2021-08-06 20:32:19,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:19,707 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 74 transitions. [2021-08-06 20:32:19,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 20:32:19,708 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:19,708 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:19,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-06 20:32:19,708 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:19,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:19,709 INFO L82 PathProgramCache]: Analyzing trace with hash -808242772, now seen corresponding path program 1 times [2021-08-06 20:32:19,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:19,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575616217] [2021-08-06 20:32:19,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:19,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:19,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:19,758 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:32:19,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:19,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575616217] [2021-08-06 20:32:19,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575616217] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:32:19,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:32:19,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 20:32:19,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456293793] [2021-08-06 20:32:19,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-06 20:32:19,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:19,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-06 20:32:19,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-06 20:32:19,761 INFO L87 Difference]: Start difference. First operand 45 states and 74 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:19,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:19,793 INFO L93 Difference]: Finished difference Result 55 states and 98 transitions. [2021-08-06 20:32:19,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-06 20:32:19,794 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 20:32:19,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:19,795 INFO L225 Difference]: With dead ends: 55 [2021-08-06 20:32:19,795 INFO L226 Difference]: Without dead ends: 55 [2021-08-06 20:32:19,796 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:32:19,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-06 20:32:19,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2021-08-06 20:32:19,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.702127659574468) internal successors, (80), 47 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:19,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 80 transitions. [2021-08-06 20:32:19,806 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 80 transitions. Word has length 20 [2021-08-06 20:32:19,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:19,806 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 80 transitions. [2021-08-06 20:32:19,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:19,806 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 80 transitions. [2021-08-06 20:32:19,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-06 20:32:19,807 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:19,807 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:19,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-06 20:32:19,808 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:19,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:19,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1904417112, now seen corresponding path program 1 times [2021-08-06 20:32:19,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:19,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127720774] [2021-08-06 20:32:19,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:19,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:19,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:19,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:32:19,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:19,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127720774] [2021-08-06 20:32:19,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127720774] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-06 20:32:19,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-06 20:32:19,874 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-06 20:32:19,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436636030] [2021-08-06 20:32:19,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-06 20:32:19,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:19,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-06 20:32:19,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-06 20:32:19,876 INFO L87 Difference]: Start difference. First operand 48 states and 80 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:19,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:19,910 INFO L93 Difference]: Finished difference Result 66 states and 114 transitions. [2021-08-06 20:32:19,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-06 20:32:19,910 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-06 20:32:19,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:19,911 INFO L225 Difference]: With dead ends: 66 [2021-08-06 20:32:19,911 INFO L226 Difference]: Without dead ends: 66 [2021-08-06 20:32:19,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 24.3ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-06 20:32:19,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-06 20:32:19,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2021-08-06 20:32:19,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.75) internal successors, (98), 56 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:19,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 98 transitions. [2021-08-06 20:32:19,916 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 98 transitions. Word has length 20 [2021-08-06 20:32:19,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:19,917 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 98 transitions. [2021-08-06 20:32:19,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:19,917 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 98 transitions. [2021-08-06 20:32:19,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:32:19,918 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:19,918 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] [2021-08-06 20:32:19,918 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-06 20:32:19,918 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:19,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:19,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1105216778, now seen corresponding path program 1 times [2021-08-06 20:32:19,919 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:19,919 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325537477] [2021-08-06 20:32:19,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:19,919 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:19,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:20,113 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 78.8 percent of original size [2021-08-06 20:32:20,150 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 78.8 percent of original size [2021-08-06 20:32:20,209 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 82.5 percent of original size [2021-08-06 20:32:20,225 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 82.5 percent of original size [2021-08-06 20:32:20,315 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 80.7 percent of original size [2021-08-06 20:32:20,330 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 80.7 percent of original size [2021-08-06 20:32:20,402 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 20:32:20,403 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:20,403 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325537477] [2021-08-06 20:32:20,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325537477] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:20,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383064938] [2021-08-06 20:32:20,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:20,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:20,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:20,409 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 20:32:20,423 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 20:32:20,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:20,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-06 20:32:20,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:21,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 45 treesize of output 33 [2021-08-06 20:32:21,295 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 20:32:21,297 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 20:32:21,304 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 20:32:21,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383064938] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:21,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:21,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 20:32:21,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546473584] [2021-08-06 20:32:21,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:32:21,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:21,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:32:21,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:32:21,308 INFO L87 Difference]: Start difference. First operand 57 states and 98 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:21,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:21,587 INFO L93 Difference]: Finished difference Result 121 states and 202 transitions. [2021-08-06 20:32:21,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:32:21,587 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 20:32:21,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:21,592 INFO L225 Difference]: With dead ends: 121 [2021-08-06 20:32:21,592 INFO L226 Difference]: Without dead ends: 116 [2021-08-06 20:32:21,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 3 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 49 ImplicationChecksByTransitivity, 311.7ms TimeCoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:32:21,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-06 20:32:21,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2021-08-06 20:32:21,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.864864864864865) internal successors, (138), 74 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:21,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 138 transitions. [2021-08-06 20:32:21,603 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 138 transitions. Word has length 22 [2021-08-06 20:32:21,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:21,603 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 138 transitions. [2021-08-06 20:32:21,603 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:21,604 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 138 transitions. [2021-08-06 20:32:21,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:32:21,604 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:21,605 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 20:32:21,624 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-08-06 20:32:21,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:21,821 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:21,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:21,822 INFO L82 PathProgramCache]: Analyzing trace with hash -467167990, now seen corresponding path program 2 times [2021-08-06 20:32:21,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:21,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264877412] [2021-08-06 20:32:21,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:21,822 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:21,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:21,959 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 78.8 percent of original size [2021-08-06 20:32:21,973 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 78.8 percent of original size [2021-08-06 20:32:22,027 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 82.5 percent of original size [2021-08-06 20:32:22,035 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 82.5 percent of original size [2021-08-06 20:32:22,111 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 20:32:22,111 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:22,111 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264877412] [2021-08-06 20:32:22,111 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264877412] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:22,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660390778] [2021-08-06 20:32:22,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:32:22,112 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:22,112 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:22,113 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 20:32:22,114 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 20:32:22,205 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:32:22,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:22,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:32:22,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:22,590 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:32:22,591 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 49 treesize of output 45 [2021-08-06 20:32:23,104 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 81.2 percent of original size [2021-08-06 20:32:23,112 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 81.2 percent of original size [2021-08-06 20:32:23,288 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 20:32:23,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660390778] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:23,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:23,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-06 20:32:23,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [253385545] [2021-08-06 20:32:23,289 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:32:23,289 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:23,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:32:23,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:32:23,290 INFO L87 Difference]: Start difference. First operand 75 states and 138 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 20:32:23,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:23,825 INFO L93 Difference]: Finished difference Result 159 states and 270 transitions. [2021-08-06 20:32:23,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:32:23,825 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 20:32:23,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:23,826 INFO L225 Difference]: With dead ends: 159 [2021-08-06 20:32:23,826 INFO L226 Difference]: Without dead ends: 154 [2021-08-06 20:32:23,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 555.7ms TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:32:23,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-06 20:32:23,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 77. [2021-08-06 20:32:23,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.881578947368421) internal successors, (143), 76 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:23,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 143 transitions. [2021-08-06 20:32:23,833 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 143 transitions. Word has length 22 [2021-08-06 20:32:23,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:23,833 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 143 transitions. [2021-08-06 20:32:23,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 20:32:23,833 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 143 transitions. [2021-08-06 20:32:23,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-06 20:32:23,834 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:23,834 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 20:32:23,867 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 20:32:24,057 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:24,057 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:24,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:24,058 INFO L82 PathProgramCache]: Analyzing trace with hash -640858166, now seen corresponding path program 3 times [2021-08-06 20:32:24,058 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:24,058 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679685394] [2021-08-06 20:32:24,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:24,058 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:24,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:24,172 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 78.8 percent of original size [2021-08-06 20:32:24,177 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 78.8 percent of original size [2021-08-06 20:32:24,279 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 20:32:24,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:24,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679685394] [2021-08-06 20:32:24,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679685394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:24,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902072813] [2021-08-06 20:32:24,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:32:24,282 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:24,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:24,289 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 20:32:24,290 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 20:32:24,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 20:32:24,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:24,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 15 conjunts are in the unsatisfiable core [2021-08-06 20:32:24,445 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:24,787 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:32:24,788 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 49 treesize of output 45 [2021-08-06 20:32:25,262 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 79.7 percent of original size [2021-08-06 20:32:25,269 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 79.7 percent of original size [2021-08-06 20:32:25,456 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 20:32:25,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902072813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:25,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:25,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-06 20:32:25,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195253838] [2021-08-06 20:32:25,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:32:25,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:25,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:32:25,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:32:25,458 INFO L87 Difference]: Start difference. First operand 77 states and 143 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 20:32:25,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:25,819 INFO L93 Difference]: Finished difference Result 134 states and 237 transitions. [2021-08-06 20:32:25,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:32:25,820 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-06 20:32:25,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:25,821 INFO L225 Difference]: With dead ends: 134 [2021-08-06 20:32:25,821 INFO L226 Difference]: Without dead ends: 129 [2021-08-06 20:32:25,821 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 385.3ms TimeCoverageRelationStatistics Valid=108, Invalid=272, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:32:25,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2021-08-06 20:32:25,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2021-08-06 20:32:25,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.8875) internal successors, (151), 80 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:25,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 151 transitions. [2021-08-06 20:32:25,826 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 151 transitions. Word has length 22 [2021-08-06 20:32:25,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:25,827 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 151 transitions. [2021-08-06 20:32:25,827 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 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 20:32:25,827 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 151 transitions. [2021-08-06 20:32:25,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:32:25,828 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:25,828 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:25,857 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:26,040 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:26,041 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:26,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:26,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1444572436, now seen corresponding path program 4 times [2021-08-06 20:32:26,042 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:26,042 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641894809] [2021-08-06 20:32:26,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:26,042 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:26,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:26,122 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:26,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:26,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641894809] [2021-08-06 20:32:26,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641894809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:26,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838177081] [2021-08-06 20:32:26,122 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:32:26,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:26,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:26,123 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 20:32:26,125 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 20:32:26,299 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:32:26,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:26,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:32:26,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:26,491 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:32:26,491 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:32:26,515 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:26,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838177081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:26,516 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:26,516 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-06 20:32:26,516 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167060644] [2021-08-06 20:32:26,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:32:26,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:26,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:32:26,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:32:26,517 INFO L87 Difference]: Start difference. First operand 81 states and 151 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 20:32:26,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:26,720 INFO L93 Difference]: Finished difference Result 192 states and 333 transitions. [2021-08-06 20:32:26,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:32:26,724 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 24 [2021-08-06 20:32:26,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:26,725 INFO L225 Difference]: With dead ends: 192 [2021-08-06 20:32:26,725 INFO L226 Difference]: Without dead ends: 192 [2021-08-06 20:32:26,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 130.3ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:32:26,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-06 20:32:26,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 97. [2021-08-06 20:32:26,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:26,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-08-06 20:32:26,732 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 24 [2021-08-06 20:32:26,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:26,733 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-08-06 20:32:26,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 20:32:26,733 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-08-06 20:32:26,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:32:26,734 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:26,734 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:26,755 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-06 20:32:26,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:26,955 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:26,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:26,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1358899948, now seen corresponding path program 5 times [2021-08-06 20:32:26,956 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:26,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960336666] [2021-08-06 20:32:26,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:26,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:26,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:27,034 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:27,035 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:27,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960336666] [2021-08-06 20:32:27,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960336666] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:27,035 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271606436] [2021-08-06 20:32:27,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:32:27,035 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:27,035 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:27,036 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 20:32:27,036 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 20:32:27,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:32:27,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:27,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:32:27,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:27,450 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:32:27,451 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:32:27,478 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:27,479 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271606436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:27,479 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:27,479 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 20:32:27,479 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1958365933] [2021-08-06 20:32:27,479 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:32:27,479 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:27,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:32:27,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:32:27,480 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:32:27,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:27,851 INFO L93 Difference]: Finished difference Result 254 states and 436 transitions. [2021-08-06 20:32:27,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:32:27,851 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 24 [2021-08-06 20:32:27,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:27,853 INFO L225 Difference]: With dead ends: 254 [2021-08-06 20:32:27,853 INFO L226 Difference]: Without dead ends: 254 [2021-08-06 20:32:27,853 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 254.8ms TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:32:27,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-08-06 20:32:27,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 99. [2021-08-06 20:32:27,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.010204081632653) internal successors, (197), 98 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:27,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 197 transitions. [2021-08-06 20:32:27,859 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 197 transitions. Word has length 24 [2021-08-06 20:32:27,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:27,859 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 197 transitions. [2021-08-06 20:32:27,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:32:27,860 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 197 transitions. [2021-08-06 20:32:27,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:32:27,861 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:27,861 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] [2021-08-06 20:32:27,885 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 20:32:28,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:28,074 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:28,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:28,074 INFO L82 PathProgramCache]: Analyzing trace with hash -751378072, now seen corresponding path program 1 times [2021-08-06 20:32:28,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:28,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382644398] [2021-08-06 20:32:28,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:28,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:28,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:28,122 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:32:28,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:28,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382644398] [2021-08-06 20:32:28,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382644398] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:28,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131233588] [2021-08-06 20:32:28,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:28,123 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:28,123 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:28,124 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 20:32:28,125 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 20:32:28,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:28,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:32:28,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:28,453 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:32:28,454 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:32:28,499 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:32:28,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2131233588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:28,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:28,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 20:32:28,500 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288681958] [2021-08-06 20:32:28,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:32:28,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:28,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:32:28,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:32:28,501 INFO L87 Difference]: Start difference. First operand 99 states and 197 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 20:32:28,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:28,581 INFO L93 Difference]: Finished difference Result 206 states and 383 transitions. [2021-08-06 20:32:28,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:32:28,581 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-08-06 20:32:28,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:28,582 INFO L225 Difference]: With dead ends: 206 [2021-08-06 20:32:28,582 INFO L226 Difference]: Without dead ends: 206 [2021-08-06 20:32:28,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:32:28,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-06 20:32:28,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2021-08-06 20:32:28,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 146 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:28,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 301 transitions. [2021-08-06 20:32:28,590 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 301 transitions. Word has length 24 [2021-08-06 20:32:28,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:28,590 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 301 transitions. [2021-08-06 20:32:28,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 20:32:28,590 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 301 transitions. [2021-08-06 20:32:28,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:32:28,591 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:28,591 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:28,614 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 20:32:28,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:28,805 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:28,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:28,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1693841640, now seen corresponding path program 6 times [2021-08-06 20:32:28,806 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:28,806 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647918577] [2021-08-06 20:32:28,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:28,806 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:28,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:28,877 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:28,877 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:28,877 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647918577] [2021-08-06 20:32:28,877 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647918577] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:28,878 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1430642027] [2021-08-06 20:32:28,878 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:32:28,878 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:28,878 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:28,878 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 20:32:28,879 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 20:32:29,092 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:32:29,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:29,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:32:29,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:29,312 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:29,313 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1430642027] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:29,313 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:29,313 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 20:32:29,313 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793985560] [2021-08-06 20:32:29,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:32:29,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:29,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:32:29,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:32:29,314 INFO L87 Difference]: Start difference. First operand 147 states and 301 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 20:32:29,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:29,454 INFO L93 Difference]: Finished difference Result 230 states and 441 transitions. [2021-08-06 20:32:29,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:32:29,454 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 24 [2021-08-06 20:32:29,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:29,455 INFO L225 Difference]: With dead ends: 230 [2021-08-06 20:32:29,455 INFO L226 Difference]: Without dead ends: 218 [2021-08-06 20:32:29,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 119.0ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:32:29,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-08-06 20:32:29,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 183. [2021-08-06 20:32:29,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.043956043956044) internal successors, (372), 182 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:29,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 372 transitions. [2021-08-06 20:32:29,470 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 372 transitions. Word has length 24 [2021-08-06 20:32:29,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:29,471 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 372 transitions. [2021-08-06 20:32:29,471 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 20:32:29,471 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 372 transitions. [2021-08-06 20:32:29,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:32:29,476 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:29,476 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] [2021-08-06 20:32:29,500 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 20:32:29,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:29,693 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:29,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:29,693 INFO L82 PathProgramCache]: Analyzing trace with hash -1547404952, now seen corresponding path program 2 times [2021-08-06 20:32:29,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:29,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509728681] [2021-08-06 20:32:29,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:29,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:29,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:29,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:32:29,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:29,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509728681] [2021-08-06 20:32:29,737 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [509728681] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:29,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820679891] [2021-08-06 20:32:29,737 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:32:29,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:29,737 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:29,738 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 20:32:29,752 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 20:32:29,969 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:32:29,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:29,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:32:29,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:30,095 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:32:30,096 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:32:30,147 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:32:30,147 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820679891] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:30,147 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:30,147 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-06 20:32:30,147 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258693200] [2021-08-06 20:32:30,148 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:32:30,148 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:30,148 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:32:30,148 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:32:30,148 INFO L87 Difference]: Start difference. First operand 183 states and 372 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 20:32:30,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:30,253 INFO L93 Difference]: Finished difference Result 221 states and 420 transitions. [2021-08-06 20:32:30,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-06 20:32:30,254 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 24 [2021-08-06 20:32:30,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:30,255 INFO L225 Difference]: With dead ends: 221 [2021-08-06 20:32:30,255 INFO L226 Difference]: Without dead ends: 221 [2021-08-06 20:32:30,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 68.8ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:32:30,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-08-06 20:32:30,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 171. [2021-08-06 20:32:30,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.0058823529411764) internal successors, (341), 170 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:30,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 341 transitions. [2021-08-06 20:32:30,260 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 341 transitions. Word has length 24 [2021-08-06 20:32:30,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:30,260 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 341 transitions. [2021-08-06 20:32:30,261 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 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 20:32:30,261 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 341 transitions. [2021-08-06 20:32:30,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:32:30,261 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:30,261 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:30,291 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 20:32:30,485 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-06 20:32:30,485 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:30,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:30,485 INFO L82 PathProgramCache]: Analyzing trace with hash -2092221976, now seen corresponding path program 7 times [2021-08-06 20:32:30,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:30,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1365531527] [2021-08-06 20:32:30,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:30,486 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:30,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:30,544 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:30,544 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:30,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1365531527] [2021-08-06 20:32:30,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1365531527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:30,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249453950] [2021-08-06 20:32:30,545 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:32:30,545 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:30,545 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:30,546 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 20:32:30,546 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 20:32:30,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:30,772 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:32:30,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:30,970 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:32:30,971 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:32:30,994 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:30,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249453950] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:30,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:30,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 20:32:30,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642978464] [2021-08-06 20:32:30,994 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:32:30,994 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:30,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:32:30,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:32:30,995 INFO L87 Difference]: Start difference. First operand 171 states and 341 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:32:31,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:31,697 INFO L93 Difference]: Finished difference Result 577 states and 984 transitions. [2021-08-06 20:32:31,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 20:32:31,697 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 24 [2021-08-06 20:32:31,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:31,700 INFO L225 Difference]: With dead ends: 577 [2021-08-06 20:32:31,700 INFO L226 Difference]: Without dead ends: 577 [2021-08-06 20:32:31,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 469.5ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:32:31,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-08-06 20:32:31,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 183. [2021-08-06 20:32:31,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.0549450549450547) internal successors, (374), 182 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:31,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 374 transitions. [2021-08-06 20:32:31,709 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 374 transitions. Word has length 24 [2021-08-06 20:32:31,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:31,710 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 374 transitions. [2021-08-06 20:32:31,710 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:32:31,710 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 374 transitions. [2021-08-06 20:32:31,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:32:31,711 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:31,711 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:31,736 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 20:32:31,934 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:31,934 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:31,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:31,934 INFO L82 PathProgramCache]: Analyzing trace with hash -1834399512, now seen corresponding path program 8 times [2021-08-06 20:32:31,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:31,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430899749] [2021-08-06 20:32:31,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:31,935 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:31,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:32,009 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:32,009 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:32,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430899749] [2021-08-06 20:32:32,009 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430899749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:32,009 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69953701] [2021-08-06 20:32:32,010 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:32:32,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:32,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:32,010 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 20:32:32,011 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 20:32:32,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:32:32,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:32,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:32:32,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:32,519 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:32,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69953701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:32,519 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:32,519 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 20:32:32,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646835232] [2021-08-06 20:32:32,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:32:32,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:32,520 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:32:32,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:32:32,520 INFO L87 Difference]: Start difference. First operand 183 states and 374 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 20:32:32,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:32,716 INFO L93 Difference]: Finished difference Result 355 states and 658 transitions. [2021-08-06 20:32:32,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:32:32,716 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 24 [2021-08-06 20:32:32,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:32,718 INFO L225 Difference]: With dead ends: 355 [2021-08-06 20:32:32,718 INFO L226 Difference]: Without dead ends: 351 [2021-08-06 20:32:32,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 161.6ms TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:32:32,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-08-06 20:32:32,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 240. [2021-08-06 20:32:32,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.1171548117154813) internal successors, (506), 239 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:32,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 506 transitions. [2021-08-06 20:32:32,725 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 506 transitions. Word has length 24 [2021-08-06 20:32:32,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:32,725 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 506 transitions. [2021-08-06 20:32:32,725 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 20:32:32,725 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 506 transitions. [2021-08-06 20:32:32,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:32:32,726 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:32,726 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:32,746 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 20:32:32,936 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-06 20:32:32,937 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:32,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:32,937 INFO L82 PathProgramCache]: Analyzing trace with hash 888183016, now seen corresponding path program 9 times [2021-08-06 20:32:32,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:32,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977873972] [2021-08-06 20:32:32,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:32,937 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:32,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:33,000 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:33,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:33,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977873972] [2021-08-06 20:32:33,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1977873972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:33,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691237814] [2021-08-06 20:32:33,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:32:33,001 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:33,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:33,002 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 20:32:33,002 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 20:32:33,257 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:32:33,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:33,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:32:33,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:33,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:33,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1691237814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:33,467 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:33,467 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-06 20:32:33,467 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771940671] [2021-08-06 20:32:33,467 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:32:33,467 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:33,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:32:33,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:32:33,468 INFO L87 Difference]: Start difference. First operand 240 states and 506 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 20:32:33,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:33,769 INFO L93 Difference]: Finished difference Result 370 states and 706 transitions. [2021-08-06 20:32:33,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:32:33,770 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 24 [2021-08-06 20:32:33,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:33,771 INFO L225 Difference]: With dead ends: 370 [2021-08-06 20:32:33,772 INFO L226 Difference]: Without dead ends: 370 [2021-08-06 20:32:33,772 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 210.3ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:32:33,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-08-06 20:32:33,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 253. [2021-08-06 20:32:33,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.0952380952380953) internal successors, (528), 252 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:33,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 528 transitions. [2021-08-06 20:32:33,779 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 528 transitions. Word has length 24 [2021-08-06 20:32:33,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:33,779 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 528 transitions. [2021-08-06 20:32:33,779 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 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 20:32:33,779 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 528 transitions. [2021-08-06 20:32:33,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:32:33,780 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:33,780 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] [2021-08-06 20:32:33,803 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 20:32:34,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-06 20:32:34,001 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:34,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:34,001 INFO L82 PathProgramCache]: Analyzing trace with hash -1801158104, now seen corresponding path program 3 times [2021-08-06 20:32:34,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:34,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016458218] [2021-08-06 20:32:34,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:34,002 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:34,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:34,066 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:32:34,066 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:34,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016458218] [2021-08-06 20:32:34,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016458218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:34,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1243695925] [2021-08-06 20:32:34,067 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:32:34,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:34,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:34,067 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 20:32:34,068 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 20:32:34,326 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-06 20:32:34,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:34,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-06 20:32:34,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:34,430 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:32:34,431 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:32:34,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:32:34,477 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1243695925] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:34,477 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:34,477 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-08-06 20:32:34,477 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647760891] [2021-08-06 20:32:34,477 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-06 20:32:34,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:34,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-06 20:32:34,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-06 20:32:34,478 INFO L87 Difference]: Start difference. First operand 253 states and 528 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:34,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:34,570 INFO L93 Difference]: Finished difference Result 273 states and 566 transitions. [2021-08-06 20:32:34,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-06 20:32:34,577 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-06 20:32:34,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:34,578 INFO L225 Difference]: With dead ends: 273 [2021-08-06 20:32:34,578 INFO L226 Difference]: Without dead ends: 273 [2021-08-06 20:32:34,580 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 58.2ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:32:34,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-08-06 20:32:34,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 233. [2021-08-06 20:32:34,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.1293103448275863) internal successors, (494), 232 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:34,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 494 transitions. [2021-08-06 20:32:34,586 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 494 transitions. Word has length 24 [2021-08-06 20:32:34,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:34,587 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 494 transitions. [2021-08-06 20:32:34,587 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:34,587 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 494 transitions. [2021-08-06 20:32:34,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-06 20:32:34,588 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:34,588 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:34,611 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 20:32:34,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-06 20:32:34,808 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:34,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:34,808 INFO L82 PathProgramCache]: Analyzing trace with hash -1504756568, now seen corresponding path program 10 times [2021-08-06 20:32:34,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:34,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589160414] [2021-08-06 20:32:34,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:34,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:34,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:34,885 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:34,885 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:34,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589160414] [2021-08-06 20:32:34,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589160414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:34,885 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961864014] [2021-08-06 20:32:34,885 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:32:34,886 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:34,886 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:34,886 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 20:32:34,887 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 20:32:35,149 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:32:35,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:35,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:32:35,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:35,339 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:32:35,340 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:32:35,361 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:35,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1961864014] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:35,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:35,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-06 20:32:35,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677598825] [2021-08-06 20:32:35,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:32:35,362 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:35,362 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:32:35,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:32:35,363 INFO L87 Difference]: Start difference. First operand 233 states and 494 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:32:35,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:35,686 INFO L93 Difference]: Finished difference Result 604 states and 1149 transitions. [2021-08-06 20:32:35,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:32:35,687 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 24 [2021-08-06 20:32:35,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:35,689 INFO L225 Difference]: With dead ends: 604 [2021-08-06 20:32:35,689 INFO L226 Difference]: Without dead ends: 604 [2021-08-06 20:32:35,690 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 226.1ms TimeCoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:32:35,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-08-06 20:32:35,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 283. [2021-08-06 20:32:35,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.1702127659574466) internal successors, (612), 282 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:35,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 612 transitions. [2021-08-06 20:32:35,699 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 612 transitions. Word has length 24 [2021-08-06 20:32:35,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:35,700 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 612 transitions. [2021-08-06 20:32:35,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:32:35,700 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 612 transitions. [2021-08-06 20:32:35,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:35,701 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:35,701 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:35,724 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 20:32:35,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-06 20:32:35,924 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:35,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:35,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1327513290, now seen corresponding path program 4 times [2021-08-06 20:32:35,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:35,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840056671] [2021-08-06 20:32:35,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:35,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:35,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:36,109 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 208, result has 28.5 percent of original size [2021-08-06 20:32:36,128 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 208, result has 28.5 percent of original size [2021-08-06 20:32:36,207 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 53, result has 61.6 percent of original size [2021-08-06 20:32:36,217 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 53, result has 61.6 percent of original size [2021-08-06 20:32:36,289 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 53, result has 60.2 percent of original size [2021-08-06 20:32:36,296 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 53, result has 60.2 percent of original size [2021-08-06 20:32:36,358 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 75, result has 47.6 percent of original size [2021-08-06 20:32:36,372 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 75, result has 47.6 percent of original size [2021-08-06 20:32:36,430 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 37, result has 38.3 percent of original size [2021-08-06 20:32:36,433 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 37, result has 38.3 percent of original size [2021-08-06 20:32:36,462 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 20:32:36,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:36,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840056671] [2021-08-06 20:32:36,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [840056671] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:36,463 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762264856] [2021-08-06 20:32:36,463 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:32:36,463 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:36,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:36,464 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 20:32:36,465 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 20:32:36,750 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:32:36,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:36,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:32:36,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:37,996 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:32:37,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 20:32:38,153 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:38,154 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:38,159 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 20:32:38,159 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762264856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:38,159 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:38,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:32:38,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [811862243] [2021-08-06 20:32:38,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:32:38,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:38,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:32:38,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:32:38,161 INFO L87 Difference]: Start difference. First operand 283 states and 612 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 20:32:38,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:38,715 INFO L93 Difference]: Finished difference Result 423 states and 858 transitions. [2021-08-06 20:32:38,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:32:38,715 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 20:32:38,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:38,717 INFO L225 Difference]: With dead ends: 423 [2021-08-06 20:32:38,717 INFO L226 Difference]: Without dead ends: 418 [2021-08-06 20:32:38,718 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 678.8ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:32:38,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-08-06 20:32:38,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 292. [2021-08-06 20:32:38,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.178694158075601) internal successors, (634), 291 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:38,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 634 transitions. [2021-08-06 20:32:38,726 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 634 transitions. Word has length 26 [2021-08-06 20:32:38,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:38,726 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 634 transitions. [2021-08-06 20:32:38,726 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 20:32:38,726 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 634 transitions. [2021-08-06 20:32:38,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:38,727 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:38,727 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:38,752 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 20:32:38,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:38,953 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:38,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:38,953 INFO L82 PathProgramCache]: Analyzing trace with hash 1581302414, now seen corresponding path program 5 times [2021-08-06 20:32:38,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:38,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206308915] [2021-08-06 20:32:38,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:38,954 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:39,133 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 283, result has 21.4 percent of original size [2021-08-06 20:32:39,149 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 283, result has 21.4 percent of original size [2021-08-06 20:32:39,219 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 89, result has 62.4 percent of original size [2021-08-06 20:32:39,243 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 89, result has 62.4 percent of original size [2021-08-06 20:32:39,353 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 89, result has 61.6 percent of original size [2021-08-06 20:32:39,375 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 89, result has 61.6 percent of original size [2021-08-06 20:32:39,466 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 119, result has 52.0 percent of original size [2021-08-06 20:32:39,481 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 119, result has 52.0 percent of original size [2021-08-06 20:32:39,575 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 139, result has 43.3 percent of original size [2021-08-06 20:32:39,588 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 139, result has 43.3 percent of original size [2021-08-06 20:32:39,655 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 20:32:39,655 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:39,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206308915] [2021-08-06 20:32:39,655 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206308915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:39,655 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083554518] [2021-08-06 20:32:39,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:32:39,656 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:39,656 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:39,656 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 20:32:39,657 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 20:32:40,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:32:40,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:40,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:32:40,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:41,151 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:32:41,152 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 20:32:41,260 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:32:41,264 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:32:41,421 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:41,422 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:41,427 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 20:32:41,427 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083554518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:41,427 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:41,427 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:32:41,427 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350336443] [2021-08-06 20:32:41,428 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:32:41,428 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:41,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:32:41,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:32:41,429 INFO L87 Difference]: Start difference. First operand 292 states and 634 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 20:32:42,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:42,550 INFO L93 Difference]: Finished difference Result 415 states and 845 transitions. [2021-08-06 20:32:42,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:32:42,551 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-06 20:32:42,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:42,553 INFO L225 Difference]: With dead ends: 415 [2021-08-06 20:32:42,553 INFO L226 Difference]: Without dead ends: 410 [2021-08-06 20:32:42,553 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1261.3ms TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:32:42,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-06 20:32:42,559 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 296. [2021-08-06 20:32:42,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.169491525423729) internal successors, (640), 295 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:42,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 640 transitions. [2021-08-06 20:32:42,561 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 640 transitions. Word has length 26 [2021-08-06 20:32:42,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:42,561 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 640 transitions. [2021-08-06 20:32:42,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 20:32:42,561 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 640 transitions. [2021-08-06 20:32:42,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:42,562 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:42,562 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:42,589 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-06 20:32:42,762 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-06 20:32:42,762 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:42,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:42,763 INFO L82 PathProgramCache]: Analyzing trace with hash -522234294, now seen corresponding path program 11 times [2021-08-06 20:32:42,763 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:42,763 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842871401] [2021-08-06 20:32:42,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:42,763 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:42,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:42,868 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 45, result has 48.9 percent of original size [2021-08-06 20:32:42,877 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 45, result has 48.9 percent of original size [2021-08-06 20:32:42,917 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 59, result has 50.8 percent of original size [2021-08-06 20:32:42,929 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 59, result has 50.8 percent of original size [2021-08-06 20:32:42,989 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 59, result has 52.8 percent of original size [2021-08-06 20:32:43,000 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 59, result has 52.8 percent of original size [2021-08-06 20:32:43,074 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 80, result has 59.6 percent of original size [2021-08-06 20:32:43,094 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 80, result has 59.6 percent of original size [2021-08-06 20:32:43,196 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 60, result has 64.1 percent of original size [2021-08-06 20:32:43,210 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 60, result has 64.1 percent of original size [2021-08-06 20:32:43,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:43,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:43,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842871401] [2021-08-06 20:32:43,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842871401] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:43,336 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1239405243] [2021-08-06 20:32:43,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:32:43,336 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:43,336 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:43,341 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 20:32:43,341 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 20:32:43,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:32:43,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:43,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:32:43,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:44,878 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 20:32:44,878 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 82 [2021-08-06 20:32:45,069 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:45,071 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:45,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:32:45,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1239405243] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:45,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:45,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 20:32:45,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118474870] [2021-08-06 20:32:45,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:32:45,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:45,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:32:45,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:32:45,077 INFO L87 Difference]: Start difference. First operand 296 states and 640 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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 20:32:46,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:46,849 INFO L93 Difference]: Finished difference Result 358 states and 728 transitions. [2021-08-06 20:32:46,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:32:46,850 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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 26 [2021-08-06 20:32:46,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:46,851 INFO L225 Difference]: With dead ends: 358 [2021-08-06 20:32:46,851 INFO L226 Difference]: Without dead ends: 353 [2021-08-06 20:32:46,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 257 ImplicationChecksByTransitivity, 1843.5ms TimeCoverageRelationStatistics Valid=196, Invalid=1064, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:32:46,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 353 states. [2021-08-06 20:32:46,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 353 to 304. [2021-08-06 20:32:46,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.155115511551155) internal successors, (653), 303 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:46,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 653 transitions. [2021-08-06 20:32:46,859 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 653 transitions. Word has length 26 [2021-08-06 20:32:46,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:46,859 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 653 transitions. [2021-08-06 20:32:46,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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 20:32:46,859 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 653 transitions. [2021-08-06 20:32:46,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:46,860 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:46,860 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:46,881 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 20:32:47,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:47,077 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:47,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:47,077 INFO L82 PathProgramCache]: Analyzing trace with hash -1437337910, now seen corresponding path program 6 times [2021-08-06 20:32:47,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:47,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [25987788] [2021-08-06 20:32:47,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:47,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:47,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:47,208 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 216, result has 44.2 percent of original size [2021-08-06 20:32:47,230 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 216, result has 44.2 percent of original size [2021-08-06 20:32:47,327 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 83, result has 60.8 percent of original size [2021-08-06 20:32:47,339 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 83, result has 60.8 percent of original size [2021-08-06 20:32:47,432 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 83, result has 59.9 percent of original size [2021-08-06 20:32:47,443 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 83, result has 59.9 percent of original size [2021-08-06 20:32:47,511 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 89, result has 44.7 percent of original size [2021-08-06 20:32:47,519 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 89, result has 44.7 percent of original size [2021-08-06 20:32:47,587 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 113, result has 34.7 percent of original size [2021-08-06 20:32:47,595 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 113, result has 34.7 percent of original size [2021-08-06 20:32:47,645 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 20:32:47,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:47,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [25987788] [2021-08-06 20:32:47,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [25987788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:47,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1228768096] [2021-08-06 20:32:47,645 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:32:47,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:47,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:47,646 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 20:32:47,669 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 20:32:48,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:32:48,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:48,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:32:48,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:49,161 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:32:49,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 20:32:49,393 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:49,394 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:49,399 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 20:32:49,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1228768096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:49,399 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:49,399 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:32:49,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28114054] [2021-08-06 20:32:49,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:32:49,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:49,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:32:49,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:32:49,400 INFO L87 Difference]: Start difference. First operand 304 states and 653 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 20:32:50,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:50,498 INFO L93 Difference]: Finished difference Result 520 states and 1013 transitions. [2021-08-06 20:32:50,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:32:50,499 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 20:32:50,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:50,501 INFO L225 Difference]: With dead ends: 520 [2021-08-06 20:32:50,501 INFO L226 Difference]: Without dead ends: 510 [2021-08-06 20:32:50,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 292 ImplicationChecksByTransitivity, 1091.7ms TimeCoverageRelationStatistics Valid=204, Invalid=852, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:32:50,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-08-06 20:32:50,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 308. [2021-08-06 20:32:50,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 2.1596091205211727) internal successors, (663), 307 states have internal predecessors, (663), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:50,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 663 transitions. [2021-08-06 20:32:50,519 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 663 transitions. Word has length 26 [2021-08-06 20:32:50,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:50,519 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 663 transitions. [2021-08-06 20:32:50,519 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 20:32:50,519 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 663 transitions. [2021-08-06 20:32:50,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:50,520 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:50,520 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:50,561 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 20:32:50,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:50,743 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:50,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:50,744 INFO L82 PathProgramCache]: Analyzing trace with hash 531486410, now seen corresponding path program 7 times [2021-08-06 20:32:50,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:50,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546344915] [2021-08-06 20:32:50,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:50,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:50,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:50,852 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 95.2 percent of original size [2021-08-06 20:32:50,860 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 95.2 percent of original size [2021-08-06 20:32:50,997 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 89.4 percent of original size [2021-08-06 20:32:51,004 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 89.4 percent of original size [2021-08-06 20:32:51,139 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 20:32:51,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:51,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546344915] [2021-08-06 20:32:51,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546344915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:51,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439368592] [2021-08-06 20:32:51,140 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:32:51,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:51,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:51,145 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 20:32:51,170 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 20:32:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:51,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:32:51,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:52,997 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:32:52,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 20:32:53,145 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:53,147 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:53,152 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 20:32:53,152 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439368592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:53,152 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:53,152 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:32:53,153 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198427573] [2021-08-06 20:32:53,153 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:32:53,153 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:53,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:32:53,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:32:53,154 INFO L87 Difference]: Start difference. First operand 308 states and 663 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 20:32:54,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:54,447 INFO L93 Difference]: Finished difference Result 531 states and 1064 transitions. [2021-08-06 20:32:54,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 20:32:54,448 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 20:32:54,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:54,449 INFO L225 Difference]: With dead ends: 531 [2021-08-06 20:32:54,449 INFO L226 Difference]: Without dead ends: 526 [2021-08-06 20:32:54,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 280 ImplicationChecksByTransitivity, 1276.4ms TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:32:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 526 states. [2021-08-06 20:32:54,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 526 to 312. [2021-08-06 20:32:54,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 312 states, 311 states have (on average 2.1639871382636655) internal successors, (673), 311 states have internal predecessors, (673), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:54,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 312 states to 312 states and 673 transitions. [2021-08-06 20:32:54,457 INFO L78 Accepts]: Start accepts. Automaton has 312 states and 673 transitions. Word has length 26 [2021-08-06 20:32:54,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:54,458 INFO L470 AbstractCegarLoop]: Abstraction has 312 states and 673 transitions. [2021-08-06 20:32:54,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 20:32:54,458 INFO L276 IsEmpty]: Start isEmpty. Operand 312 states and 673 transitions. [2021-08-06 20:32:54,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:54,459 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:54,459 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:54,485 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 20:32:54,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:54,683 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:54,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:54,684 INFO L82 PathProgramCache]: Analyzing trace with hash -1040898358, now seen corresponding path program 8 times [2021-08-06 20:32:54,684 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:54,684 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878261216] [2021-08-06 20:32:54,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:54,684 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:54,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:54,786 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 85.0 percent of original size [2021-08-06 20:32:54,796 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 85.0 percent of original size [2021-08-06 20:32:54,873 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 97.0 percent of original size [2021-08-06 20:32:54,880 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 97.0 percent of original size [2021-08-06 20:32:54,950 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 88.3 percent of original size [2021-08-06 20:32:54,957 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 88.3 percent of original size [2021-08-06 20:32:55,022 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 35, result has 67.3 percent of original size [2021-08-06 20:32:55,028 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 35, result has 67.3 percent of original size [2021-08-06 20:32:55,092 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 20:32:55,093 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:55,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878261216] [2021-08-06 20:32:55,093 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1878261216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:55,093 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1835519095] [2021-08-06 20:32:55,093 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:32:55,093 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:55,093 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:55,094 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 20:32:55,094 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 20:32:55,788 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:32:55,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:32:55,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:32:55,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:32:56,593 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:32:56,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-06 20:32:57,103 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:57,104 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:32:57,109 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 20:32:57,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1835519095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:57,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:32:57,110 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:32:57,110 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376957785] [2021-08-06 20:32:57,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:32:57,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:32:57,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:32:57,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:32:57,110 INFO L87 Difference]: Start difference. First operand 312 states and 673 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 20:32:58,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:32:58,618 INFO L93 Difference]: Finished difference Result 576 states and 1153 transitions. [2021-08-06 20:32:58,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:32:58,620 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 20:32:58,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:32:58,621 INFO L225 Difference]: With dead ends: 576 [2021-08-06 20:32:58,621 INFO L226 Difference]: Without dead ends: 571 [2021-08-06 20:32:58,622 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 1462.4ms TimeCoverageRelationStatistics Valid=306, Invalid=1100, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:32:58,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 571 states. [2021-08-06 20:32:58,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 571 to 314. [2021-08-06 20:32:58,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.1661341853035143) internal successors, (678), 313 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:32:58,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 678 transitions. [2021-08-06 20:32:58,630 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 678 transitions. Word has length 26 [2021-08-06 20:32:58,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:32:58,630 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 678 transitions. [2021-08-06 20:32:58,630 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 20:32:58,631 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 678 transitions. [2021-08-06 20:32:58,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:32:58,631 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:32:58,632 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:32:58,657 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 20:32:58,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:58,847 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:32:58,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:32:58,847 INFO L82 PathProgramCache]: Analyzing trace with hash 1139814798, now seen corresponding path program 9 times [2021-08-06 20:32:58,847 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:32:58,847 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958478885] [2021-08-06 20:32:58,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:32:58,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:32:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:32:58,949 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 89.2 percent of original size [2021-08-06 20:32:58,959 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 89.2 percent of original size [2021-08-06 20:32:59,023 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 13, result has 89.1 percent of original size [2021-08-06 20:32:59,032 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 13, result has 89.1 percent of original size [2021-08-06 20:32:59,099 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 81.8 percent of original size [2021-08-06 20:32:59,108 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 81.8 percent of original size [2021-08-06 20:32:59,169 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 69.8 percent of original size [2021-08-06 20:32:59,176 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 69.8 percent of original size [2021-08-06 20:32:59,255 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 20:32:59,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:32:59,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958478885] [2021-08-06 20:32:59,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958478885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:32:59,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768550745] [2021-08-06 20:32:59,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:32:59,256 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:32:59,256 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:32:59,256 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 20:32:59,257 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 20:33:00,041 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:33:00,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:00,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:33:00,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:00,906 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:33:00,906 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-06 20:33:01,165 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:33:01,169 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:33:01,447 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:01,448 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:01,453 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 20:33:01,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768550745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:01,454 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:01,454 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:33:01,454 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539173396] [2021-08-06 20:33:01,454 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:33:01,454 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:01,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:33:01,454 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:33:01,454 INFO L87 Difference]: Start difference. First operand 314 states and 678 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 20:33:02,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:02,913 INFO L93 Difference]: Finished difference Result 631 states and 1245 transitions. [2021-08-06 20:33:02,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:33:02,914 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 20:33:02,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:02,916 INFO L225 Difference]: With dead ends: 631 [2021-08-06 20:33:02,916 INFO L226 Difference]: Without dead ends: 621 [2021-08-06 20:33:02,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 420 ImplicationChecksByTransitivity, 1360.6ms TimeCoverageRelationStatistics Valid=323, Invalid=1159, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:33:02,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 621 states. [2021-08-06 20:33:02,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 621 to 319. [2021-08-06 20:33:02,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 2.1729559748427674) internal successors, (691), 318 states have internal predecessors, (691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:02,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 691 transitions. [2021-08-06 20:33:02,925 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 691 transitions. Word has length 26 [2021-08-06 20:33:02,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:02,925 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 691 transitions. [2021-08-06 20:33:02,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 20:33:02,926 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 691 transitions. [2021-08-06 20:33:02,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:02,926 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:02,926 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:33:02,959 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 20:33:03,148 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-06 20:33:03,149 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:03,149 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:03,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1863078198, now seen corresponding path program 10 times [2021-08-06 20:33:03,149 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:03,149 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842863456] [2021-08-06 20:33:03,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:03,150 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:03,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:03,283 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 206, result has 47.6 percent of original size [2021-08-06 20:33:03,329 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 206, result has 47.6 percent of original size [2021-08-06 20:33:03,438 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 82, result has 64.5 percent of original size [2021-08-06 20:33:03,457 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 82, result has 64.5 percent of original size [2021-08-06 20:33:03,558 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 126, result has 39.1 percent of original size [2021-08-06 20:33:03,567 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 126, result has 39.1 percent of original size [2021-08-06 20:33:03,628 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 126, result has 37.6 percent of original size [2021-08-06 20:33:03,638 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 126, result has 37.6 percent of original size [2021-08-06 20:33:03,688 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 158, result has 28.8 percent of original size [2021-08-06 20:33:03,697 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 158, result has 28.8 percent of original size [2021-08-06 20:33:03,738 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 20:33:03,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:03,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842863456] [2021-08-06 20:33:03,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842863456] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:03,739 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633739574] [2021-08-06 20:33:03,739 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:33:03,739 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:03,739 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:03,740 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 20:33:03,740 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 20:33:04,575 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:33:04,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:04,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:33:04,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:05,536 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:33:05,536 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 20:33:05,626 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:33:05,629 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:33:05,753 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:05,754 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:05,759 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 20:33:05,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633739574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:05,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:05,760 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:33:05,760 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673613251] [2021-08-06 20:33:05,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:33:05,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:05,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:33:05,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:33:05,760 INFO L87 Difference]: Start difference. First operand 319 states and 691 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 20:33:07,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:07,042 INFO L93 Difference]: Finished difference Result 588 states and 1144 transitions. [2021-08-06 20:33:07,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:33:07,043 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 20:33:07,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:07,044 INFO L225 Difference]: With dead ends: 588 [2021-08-06 20:33:07,044 INFO L226 Difference]: Without dead ends: 578 [2021-08-06 20:33:07,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1234.0ms TimeCoverageRelationStatistics Valid=239, Invalid=883, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:33:07,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 578 states. [2021-08-06 20:33:07,051 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 578 to 323. [2021-08-06 20:33:07,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 2.1801242236024843) internal successors, (702), 322 states have internal predecessors, (702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:07,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 702 transitions. [2021-08-06 20:33:07,053 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 702 transitions. Word has length 26 [2021-08-06 20:33:07,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:07,053 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 702 transitions. [2021-08-06 20:33:07,053 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 20:33:07,053 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 702 transitions. [2021-08-06 20:33:07,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:07,054 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:07,054 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:33:07,093 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 20:33:07,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-06 20:33:07,273 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:07,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:07,273 INFO L82 PathProgramCache]: Analyzing trace with hash 244491850, now seen corresponding path program 12 times [2021-08-06 20:33:07,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:07,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536499519] [2021-08-06 20:33:07,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:07,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:07,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:07,359 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 101, result has 35.7 percent of original size [2021-08-06 20:33:07,369 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 101, result has 35.7 percent of original size [2021-08-06 20:33:07,413 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 102, result has 51.4 percent of original size [2021-08-06 20:33:07,428 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 102, result has 51.4 percent of original size [2021-08-06 20:33:07,493 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 102, result has 52.6 percent of original size [2021-08-06 20:33:07,509 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 102, result has 52.6 percent of original size [2021-08-06 20:33:07,596 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 151, result has 60.2 percent of original size [2021-08-06 20:33:07,669 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 151, result has 60.2 percent of original size [2021-08-06 20:33:07,841 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 92, result has 42.5 percent of original size [2021-08-06 20:33:07,850 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 92, result has 42.5 percent of original size [2021-08-06 20:33:07,890 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 88.2 percent of original size [2021-08-06 20:33:07,894 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 88.2 percent of original size [2021-08-06 20:33:07,950 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:07,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:07,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536499519] [2021-08-06 20:33:07,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1536499519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:07,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419148498] [2021-08-06 20:33:07,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:33:07,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:07,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:07,951 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 20:33:07,951 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 20:33:08,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:33:08,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:08,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:33:08,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:09,924 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 20:33:09,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 118 treesize of output 102 [2021-08-06 20:33:11,517 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:11,518 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:11,523 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:11,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419148498] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:11,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:11,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-06 20:33:11,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204234947] [2021-08-06 20:33:11,524 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:33:11,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:11,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:33:11,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:33:11,524 INFO L87 Difference]: Start difference. First operand 323 states and 702 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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 20:33:13,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:13,696 INFO L93 Difference]: Finished difference Result 422 states and 848 transitions. [2021-08-06 20:33:13,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:33:13,696 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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 26 [2021-08-06 20:33:13,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:13,698 INFO L225 Difference]: With dead ends: 422 [2021-08-06 20:33:13,698 INFO L226 Difference]: Without dead ends: 417 [2021-08-06 20:33:13,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 2285.9ms TimeCoverageRelationStatistics Valid=326, Invalid=1744, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:33:13,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 417 states. [2021-08-06 20:33:13,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 417 to 321. [2021-08-06 20:33:13,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.175) internal successors, (696), 320 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:13,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 696 transitions. [2021-08-06 20:33:13,705 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 696 transitions. Word has length 26 [2021-08-06 20:33:13,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:13,705 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 696 transitions. [2021-08-06 20:33:13,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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 20:33:13,706 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 696 transitions. [2021-08-06 20:33:13,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:13,706 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:13,706 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:33:13,735 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-06 20:33:13,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:13,921 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:13,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:13,921 INFO L82 PathProgramCache]: Analyzing trace with hash -670611766, now seen corresponding path program 11 times [2021-08-06 20:33:13,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:13,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1165925859] [2021-08-06 20:33:13,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:13,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:13,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:14,016 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 89.7 percent of original size [2021-08-06 20:33:14,026 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 89.7 percent of original size [2021-08-06 20:33:14,201 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 88.2 percent of original size [2021-08-06 20:33:14,206 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 88.2 percent of original size [2021-08-06 20:33:14,254 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 75.7 percent of original size [2021-08-06 20:33:14,258 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 75.7 percent of original size [2021-08-06 20:33:14,322 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 20:33:14,322 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:14,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1165925859] [2021-08-06 20:33:14,322 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1165925859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:14,322 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1350869613] [2021-08-06 20:33:14,322 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:33:14,322 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:14,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:14,323 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 20:33:14,324 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 20:33:15,349 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:33:15,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:15,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:33:15,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:16,191 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:33:16,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 84 [2021-08-06 20:33:16,878 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:16,879 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:16,885 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 20:33:16,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1350869613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:16,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:16,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:33:16,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682546128] [2021-08-06 20:33:16,887 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:33:16,887 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:16,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:33:16,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:33:16,893 INFO L87 Difference]: Start difference. First operand 321 states and 696 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 20:33:19,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:19,187 INFO L93 Difference]: Finished difference Result 686 states and 1334 transitions. [2021-08-06 20:33:19,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-06 20:33:19,188 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-06 20:33:19,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:19,190 INFO L225 Difference]: With dead ends: 686 [2021-08-06 20:33:19,190 INFO L226 Difference]: Without dead ends: 676 [2021-08-06 20:33:19,190 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 2207.0ms TimeCoverageRelationStatistics Valid=408, Invalid=1662, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:33:19,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2021-08-06 20:33:19,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 321. [2021-08-06 20:33:19,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 321 states, 320 states have (on average 2.175) internal successors, (696), 320 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:19,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 321 states to 321 states and 696 transitions. [2021-08-06 20:33:19,208 INFO L78 Accepts]: Start accepts. Automaton has 321 states and 696 transitions. Word has length 26 [2021-08-06 20:33:19,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:19,209 INFO L470 AbstractCegarLoop]: Abstraction has 321 states and 696 transitions. [2021-08-06 20:33:19,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 20:33:19,209 INFO L276 IsEmpty]: Start isEmpty. Operand 321 states and 696 transitions. [2021-08-06 20:33:19,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:19,210 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:19,210 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:33:19,236 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 20:33:19,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:19,433 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:19,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:19,433 INFO L82 PathProgramCache]: Analyzing trace with hash -1327892918, now seen corresponding path program 13 times [2021-08-06 20:33:19,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:19,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795272207] [2021-08-06 20:33:19,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:19,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:19,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:19,494 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 65.2 percent of original size [2021-08-06 20:33:19,497 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 65.2 percent of original size [2021-08-06 20:33:19,522 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 87.4 percent of original size [2021-08-06 20:33:19,529 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 87.4 percent of original size [2021-08-06 20:33:19,576 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 88.0 percent of original size [2021-08-06 20:33:19,584 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 88.0 percent of original size [2021-08-06 20:33:19,635 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 91.4 percent of original size [2021-08-06 20:33:19,643 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 91.4 percent of original size [2021-08-06 20:33:19,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:19,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:19,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795272207] [2021-08-06 20:33:19,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795272207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:19,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008299031] [2021-08-06 20:33:19,823 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:33:19,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:19,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:19,823 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 20:33:19,824 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 20:33:20,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:20,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:33:20,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:21,578 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 20:33:21,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 100 [2021-08-06 20:33:22,454 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:22,456 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:22,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:22,461 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008299031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:22,461 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:22,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 20:33:22,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033120990] [2021-08-06 20:33:22,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:33:22,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:22,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:33:22,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:33:22,462 INFO L87 Difference]: Start difference. First operand 321 states and 696 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 20:33:25,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:25,873 INFO L93 Difference]: Finished difference Result 722 states and 1428 transitions. [2021-08-06 20:33:25,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-06 20:33:25,873 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 26 [2021-08-06 20:33:25,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:25,875 INFO L225 Difference]: With dead ends: 722 [2021-08-06 20:33:25,875 INFO L226 Difference]: Without dead ends: 702 [2021-08-06 20:33:25,876 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1232 ImplicationChecksByTransitivity, 3213.4ms TimeCoverageRelationStatistics Valid=794, Invalid=3238, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 20:33:25,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 702 states. [2021-08-06 20:33:25,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 702 to 330. [2021-08-06 20:33:25,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 330 states, 329 states have (on average 2.1793313069908815) internal successors, (717), 329 states have internal predecessors, (717), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:25,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 330 states to 330 states and 717 transitions. [2021-08-06 20:33:25,884 INFO L78 Accepts]: Start accepts. Automaton has 330 states and 717 transitions. Word has length 26 [2021-08-06 20:33:25,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:25,884 INFO L470 AbstractCegarLoop]: Abstraction has 330 states and 717 transitions. [2021-08-06 20:33:25,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 20:33:25,885 INFO L276 IsEmpty]: Start isEmpty. Operand 330 states and 717 transitions. [2021-08-06 20:33:25,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:25,885 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:25,885 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:33:25,908 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 20:33:26,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-06 20:33:26,098 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:26,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:26,098 INFO L82 PathProgramCache]: Analyzing trace with hash 277733258, now seen corresponding path program 12 times [2021-08-06 20:33:26,098 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:26,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131214557] [2021-08-06 20:33:26,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:26,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:26,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:26,178 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.7 percent of original size [2021-08-06 20:33:26,185 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.7 percent of original size [2021-08-06 20:33:26,242 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 94.6 percent of original size [2021-08-06 20:33:26,248 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 94.6 percent of original size [2021-08-06 20:33:26,294 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 76.6 percent of original size [2021-08-06 20:33:26,297 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 76.6 percent of original size [2021-08-06 20:33:26,390 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 20:33:26,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:26,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131214557] [2021-08-06 20:33:26,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131214557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:26,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944585975] [2021-08-06 20:33:26,391 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:33:26,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:26,391 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:26,393 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 20:33:26,394 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 20:33:27,544 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:33:27,544 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:27,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:33:27,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:28,594 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:33:28,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 20:33:28,759 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:28,760 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:28,765 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 20:33:28,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944585975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:28,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:28,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:33:28,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111188699] [2021-08-06 20:33:28,765 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:33:28,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:28,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:33:28,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:33:28,766 INFO L87 Difference]: Start difference. First operand 330 states and 717 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 20:33:29,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:29,403 INFO L93 Difference]: Finished difference Result 463 states and 961 transitions. [2021-08-06 20:33:29,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:33:29,403 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 20:33:29,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:29,405 INFO L225 Difference]: With dead ends: 463 [2021-08-06 20:33:29,405 INFO L226 Difference]: Without dead ends: 458 [2021-08-06 20:33:29,405 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 656.2ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:33:29,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 458 states. [2021-08-06 20:33:29,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 458 to 338. [2021-08-06 20:33:29,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.1750741839762613) internal successors, (733), 337 states have internal predecessors, (733), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:29,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 733 transitions. [2021-08-06 20:33:29,411 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 733 transitions. Word has length 26 [2021-08-06 20:33:29,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:29,411 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 733 transitions. [2021-08-06 20:33:29,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 20:33:29,411 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 733 transitions. [2021-08-06 20:33:29,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:29,412 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:29,412 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:33:29,439 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 20:33:29,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-06 20:33:29,639 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:29,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:29,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1294651510, now seen corresponding path program 13 times [2021-08-06 20:33:29,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:29,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496469079] [2021-08-06 20:33:29,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:29,640 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:29,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:29,747 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 80.0 percent of original size [2021-08-06 20:33:29,755 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 80.0 percent of original size [2021-08-06 20:33:29,812 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 79.5 percent of original size [2021-08-06 20:33:29,820 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 79.5 percent of original size [2021-08-06 20:33:29,862 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 63.2 percent of original size [2021-08-06 20:33:29,865 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 63.2 percent of original size [2021-08-06 20:33:29,935 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 20:33:29,935 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:29,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496469079] [2021-08-06 20:33:29,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496469079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:29,935 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234237068] [2021-08-06 20:33:29,935 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:33:29,935 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:29,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:29,936 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 20:33:29,937 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 20:33:31,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:31,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:33:31,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:31,853 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:33:31,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-06 20:33:32,402 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:32,405 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:32,410 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 20:33:32,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234237068] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:32,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:32,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:33:32,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498192817] [2021-08-06 20:33:32,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:33:32,411 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:32,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:33:32,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:33:32,411 INFO L87 Difference]: Start difference. First operand 338 states and 733 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 20:33:33,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:33,225 INFO L93 Difference]: Finished difference Result 523 states and 1068 transitions. [2021-08-06 20:33:33,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:33:33,241 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 20:33:33,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:33,243 INFO L225 Difference]: With dead ends: 523 [2021-08-06 20:33:33,243 INFO L226 Difference]: Without dead ends: 518 [2021-08-06 20:33:33,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 820.2ms TimeCoverageRelationStatistics Valid=210, Invalid=782, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:33:33,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 518 states. [2021-08-06 20:33:33,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 518 to 340. [2021-08-06 20:33:33,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 340 states, 339 states have (on average 2.1769911504424777) internal successors, (738), 339 states have internal predecessors, (738), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:33,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 340 states to 340 states and 738 transitions. [2021-08-06 20:33:33,251 INFO L78 Accepts]: Start accepts. Automaton has 340 states and 738 transitions. Word has length 26 [2021-08-06 20:33:33,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:33,251 INFO L470 AbstractCegarLoop]: Abstraction has 340 states and 738 transitions. [2021-08-06 20:33:33,251 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 20:33:33,251 INFO L276 IsEmpty]: Start isEmpty. Operand 340 states and 738 transitions. [2021-08-06 20:33:33,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:33,252 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:33,252 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:33:33,280 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 20:33:33,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-06 20:33:33,477 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:33,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:33,477 INFO L82 PathProgramCache]: Analyzing trace with hash -791382962, now seen corresponding path program 14 times [2021-08-06 20:33:33,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:33,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935132797] [2021-08-06 20:33:33,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:33,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:33,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:33,560 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 88.2 percent of original size [2021-08-06 20:33:33,569 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 88.2 percent of original size [2021-08-06 20:33:33,638 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 87.9 percent of original size [2021-08-06 20:33:33,647 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 87.9 percent of original size [2021-08-06 20:33:33,703 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 60.0 percent of original size [2021-08-06 20:33:33,707 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 60.0 percent of original size [2021-08-06 20:33:33,735 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 94.8 percent of original size [2021-08-06 20:33:33,739 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 94.8 percent of original size [2021-08-06 20:33:33,787 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 20:33:33,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:33,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935132797] [2021-08-06 20:33:33,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935132797] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:33,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776955138] [2021-08-06 20:33:33,788 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:33:33,788 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:33,788 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:33,789 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 20:33:33,790 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 20:33:35,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:33:35,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:35,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:33:35,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:35,780 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:33:35,781 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:33:35,781 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-06 20:33:35,790 INFO L354 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2021-08-06 20:33:35,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 140 treesize of output 104 [2021-08-06 20:33:36,165 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 56.7 percent of original size [2021-08-06 20:33:36,169 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 56.7 percent of original size [2021-08-06 20:33:36,382 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:36,384 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:36,389 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 20:33:36,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1776955138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:36,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:36,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:33:36,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604510176] [2021-08-06 20:33:36,391 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:33:36,391 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:36,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:33:36,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:33:36,392 INFO L87 Difference]: Start difference. First operand 340 states and 738 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 20:33:36,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:36,952 INFO L93 Difference]: Finished difference Result 474 states and 989 transitions. [2021-08-06 20:33:36,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-06 20:33:36,952 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 20:33:36,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:36,953 INFO L225 Difference]: With dead ends: 474 [2021-08-06 20:33:36,953 INFO L226 Difference]: Without dead ends: 469 [2021-08-06 20:33:36,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 604.6ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-08-06 20:33:36,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 469 states. [2021-08-06 20:33:36,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 469 to 343. [2021-08-06 20:33:36,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 2.1871345029239766) internal successors, (748), 342 states have internal predecessors, (748), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:36,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 748 transitions. [2021-08-06 20:33:36,961 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 748 transitions. Word has length 26 [2021-08-06 20:33:36,961 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:36,961 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 748 transitions. [2021-08-06 20:33:36,961 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 20:33:36,961 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 748 transitions. [2021-08-06 20:33:36,962 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:36,962 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:36,962 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:33:36,989 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 20:33:37,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:37,189 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:37,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:37,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1908751862, now seen corresponding path program 15 times [2021-08-06 20:33:37,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:37,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283533223] [2021-08-06 20:33:37,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:37,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:37,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:37,299 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 86.0 percent of original size [2021-08-06 20:33:37,312 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 86.0 percent of original size [2021-08-06 20:33:37,401 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 19, result has 85.8 percent of original size [2021-08-06 20:33:37,411 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 19, result has 85.8 percent of original size [2021-08-06 20:33:37,474 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 59, result has 64.0 percent of original size [2021-08-06 20:33:37,484 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 59, result has 64.0 percent of original size [2021-08-06 20:33:37,548 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 91.0 percent of original size [2021-08-06 20:33:37,552 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 91.0 percent of original size [2021-08-06 20:33:37,613 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 20:33:37,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:37,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283533223] [2021-08-06 20:33:37,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1283533223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:37,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249582865] [2021-08-06 20:33:37,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:33:37,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:37,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:37,614 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 20:33:37,616 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 20:33:38,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:33:38,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:38,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:33:38,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:39,545 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:33:39,550 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:33:39,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-06 20:33:40,142 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:40,143 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:40,148 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 20:33:40,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249582865] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:40,149 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:40,149 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 20:33:40,149 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079586650] [2021-08-06 20:33:40,149 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:33:40,149 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:40,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:33:40,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:33:40,149 INFO L87 Difference]: Start difference. First operand 343 states and 748 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 20:33:41,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:41,111 INFO L93 Difference]: Finished difference Result 495 states and 1031 transitions. [2021-08-06 20:33:41,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:33:41,111 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-06 20:33:41,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:41,113 INFO L225 Difference]: With dead ends: 495 [2021-08-06 20:33:41,113 INFO L226 Difference]: Without dead ends: 490 [2021-08-06 20:33:41,113 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 962.1ms TimeCoverageRelationStatistics Valid=176, Invalid=816, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:33:41,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 490 states. [2021-08-06 20:33:41,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 490 to 345. [2021-08-06 20:33:41,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 345 states, 344 states have (on average 2.186046511627907) internal successors, (752), 344 states have internal predecessors, (752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:41,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 345 states to 345 states and 752 transitions. [2021-08-06 20:33:41,119 INFO L78 Accepts]: Start accepts. Automaton has 345 states and 752 transitions. Word has length 26 [2021-08-06 20:33:41,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:41,119 INFO L470 AbstractCegarLoop]: Abstraction has 345 states and 752 transitions. [2021-08-06 20:33:41,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 20:33:41,119 INFO L276 IsEmpty]: Start isEmpty. Operand 345 states and 752 transitions. [2021-08-06 20:33:41,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:41,120 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:41,120 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:33:41,149 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 20:33:41,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:41,342 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:41,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:41,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1275612790, now seen corresponding path program 16 times [2021-08-06 20:33:41,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:41,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874763977] [2021-08-06 20:33:41,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:41,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:41,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:41,462 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 332, result has 27.4 percent of original size [2021-08-06 20:33:41,494 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 332, result has 27.4 percent of original size [2021-08-06 20:33:41,623 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 133, result has 53.3 percent of original size [2021-08-06 20:33:41,644 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 133, result has 53.3 percent of original size [2021-08-06 20:33:41,742 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 121, result has 48.5 percent of original size [2021-08-06 20:33:41,757 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 121, result has 48.5 percent of original size [2021-08-06 20:33:41,816 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 121, result has 47.4 percent of original size [2021-08-06 20:33:41,829 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 121, result has 47.4 percent of original size [2021-08-06 20:33:41,884 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 147, result has 40.2 percent of original size [2021-08-06 20:33:41,912 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 147, result has 40.2 percent of original size [2021-08-06 20:33:41,962 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 20:33:41,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:41,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874763977] [2021-08-06 20:33:41,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874763977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:41,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1070048033] [2021-08-06 20:33:41,962 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:33:41,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:41,962 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:41,963 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 20:33:41,964 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 20:33:43,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:33:43,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:43,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:33:43,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:44,294 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:33:44,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-06 20:33:44,393 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:33:44,396 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:33:44,523 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:44,524 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:44,530 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 20:33:44,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1070048033] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:44,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:44,530 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:33:44,530 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753372721] [2021-08-06 20:33:44,530 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:33:44,530 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:44,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:33:44,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:33:44,531 INFO L87 Difference]: Start difference. First operand 345 states and 752 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 20:33:45,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:45,254 INFO L93 Difference]: Finished difference Result 491 states and 1005 transitions. [2021-08-06 20:33:45,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:33:45,255 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 20:33:45,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:45,256 INFO L225 Difference]: With dead ends: 491 [2021-08-06 20:33:45,256 INFO L226 Difference]: Without dead ends: 481 [2021-08-06 20:33:45,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 847.1ms TimeCoverageRelationStatistics Valid=166, Invalid=536, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:33:45,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 481 states. [2021-08-06 20:33:45,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 481 to 348. [2021-08-06 20:33:45,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.195965417867435) internal successors, (762), 347 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:45,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 762 transitions. [2021-08-06 20:33:45,263 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 762 transitions. Word has length 26 [2021-08-06 20:33:45,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:45,263 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 762 transitions. [2021-08-06 20:33:45,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 20:33:45,263 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 762 transitions. [2021-08-06 20:33:45,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:45,264 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:45,264 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:33:45,301 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-06 20:33:45,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:45,489 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:45,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:45,489 INFO L82 PathProgramCache]: Analyzing trace with hash 831957258, now seen corresponding path program 14 times [2021-08-06 20:33:45,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:45,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874373510] [2021-08-06 20:33:45,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:45,489 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:45,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:45,545 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 63, result has 38.8 percent of original size [2021-08-06 20:33:45,552 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 63, result has 38.8 percent of original size [2021-08-06 20:33:45,597 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 79, result has 41.9 percent of original size [2021-08-06 20:33:45,603 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 79, result has 41.9 percent of original size [2021-08-06 20:33:45,646 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 79, result has 44.8 percent of original size [2021-08-06 20:33:45,661 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 79, result has 44.8 percent of original size [2021-08-06 20:33:45,718 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 84, result has 52.3 percent of original size [2021-08-06 20:33:45,731 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 84, result has 52.3 percent of original size [2021-08-06 20:33:45,780 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 44, result has 45.0 percent of original size [2021-08-06 20:33:45,783 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 44, result has 45.0 percent of original size [2021-08-06 20:33:45,861 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:45,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:45,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874373510] [2021-08-06 20:33:45,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874373510] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:45,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966225150] [2021-08-06 20:33:45,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:33:45,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:45,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:45,862 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 20:33:45,862 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 20:33:47,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:33:47,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:47,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-06 20:33:47,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:48,386 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 20:33:48,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 118 treesize of output 102 [2021-08-06 20:33:49,220 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:49,222 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:49,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1966225150] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:49,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:49,227 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-06 20:33:49,227 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981740826] [2021-08-06 20:33:49,227 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-06 20:33:49,227 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:49,228 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-06 20:33:49,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:33:49,228 INFO L87 Difference]: Start difference. First operand 348 states and 762 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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 20:33:50,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:33:50,912 INFO L93 Difference]: Finished difference Result 437 states and 890 transitions. [2021-08-06 20:33:50,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 20:33:50,913 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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 26 [2021-08-06 20:33:50,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:33:50,915 INFO L225 Difference]: With dead ends: 437 [2021-08-06 20:33:50,915 INFO L226 Difference]: Without dead ends: 427 [2021-08-06 20:33:50,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1776.6ms TimeCoverageRelationStatistics Valid=404, Invalid=2146, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 20:33:50,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 427 states. [2021-08-06 20:33:50,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 427 to 348. [2021-08-06 20:33:50,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 348 states, 347 states have (on average 2.195965417867435) internal successors, (762), 347 states have internal predecessors, (762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:33:50,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 348 states to 348 states and 762 transitions. [2021-08-06 20:33:50,921 INFO L78 Accepts]: Start accepts. Automaton has 348 states and 762 transitions. Word has length 26 [2021-08-06 20:33:50,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:33:50,921 INFO L470 AbstractCegarLoop]: Abstraction has 348 states and 762 transitions. [2021-08-06 20:33:50,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 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 20:33:50,921 INFO L276 IsEmpty]: Start isEmpty. Operand 348 states and 762 transitions. [2021-08-06 20:33:50,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:33:50,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:33:50,922 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:33:50,951 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 20:33:51,147 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-06 20:33:51,147 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:33:51,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:33:51,147 INFO L82 PathProgramCache]: Analyzing trace with hash -659537654, now seen corresponding path program 15 times [2021-08-06 20:33:51,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:33:51,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224943236] [2021-08-06 20:33:51,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:33:51,147 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:33:51,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:33:51,198 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 65.2 percent of original size [2021-08-06 20:33:51,201 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 65.2 percent of original size [2021-08-06 20:33:51,227 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 87.4 percent of original size [2021-08-06 20:33:51,234 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 87.4 percent of original size [2021-08-06 20:33:51,277 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 88.0 percent of original size [2021-08-06 20:33:51,283 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 88.0 percent of original size [2021-08-06 20:33:51,332 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 53.3 percent of original size [2021-08-06 20:33:51,348 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 53.3 percent of original size [2021-08-06 20:33:51,502 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:51,502 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:33:51,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224943236] [2021-08-06 20:33:51,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224943236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:51,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585366294] [2021-08-06 20:33:51,503 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:33:51,503 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:33:51,503 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:33:51,537 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 20:33:51,537 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 20:33:53,110 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:33:53,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:33:53,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:33:53,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:33:54,356 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:33:54,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 120 treesize of output 134 [2021-08-06 20:33:59,041 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 62, result has 31.9 percent of original size [2021-08-06 20:33:59,051 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 62, result has 31.9 percent of original size [2021-08-06 20:33:59,169 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:59,170 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:33:59,176 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:33:59,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585366294] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:33:59,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:33:59,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 23 [2021-08-06 20:33:59,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321200041] [2021-08-06 20:33:59,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:33:59,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:33:59,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:33:59,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=464, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:33:59,177 INFO L87 Difference]: Start difference. First operand 348 states and 762 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 20:34:01,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:01,538 INFO L93 Difference]: Finished difference Result 589 states and 1200 transitions. [2021-08-06 20:34:01,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 20:34:01,539 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 26 [2021-08-06 20:34:01,539 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:01,541 INFO L225 Difference]: With dead ends: 589 [2021-08-06 20:34:01,541 INFO L226 Difference]: Without dead ends: 579 [2021-08-06 20:34:01,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 935 ImplicationChecksByTransitivity, 2392.2ms TimeCoverageRelationStatistics Valid=502, Invalid=2804, Unknown=0, NotChecked=0, Total=3306 [2021-08-06 20:34:01,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 579 states. [2021-08-06 20:34:01,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 579 to 390. [2021-08-06 20:34:01,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 390 states, 389 states have (on average 2.2416452442159382) internal successors, (872), 389 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:01,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 390 states to 390 states and 872 transitions. [2021-08-06 20:34:01,548 INFO L78 Accepts]: Start accepts. Automaton has 390 states and 872 transitions. Word has length 26 [2021-08-06 20:34:01,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:01,548 INFO L470 AbstractCegarLoop]: Abstraction has 390 states and 872 transitions. [2021-08-06 20:34:01,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 23 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 20:34:01,549 INFO L276 IsEmpty]: Start isEmpty. Operand 390 states and 872 transitions. [2021-08-06 20:34:01,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:01,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:01,550 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:34:01,576 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-06 20:34:01,764 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:01,765 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:01,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:01,765 INFO L82 PathProgramCache]: Analyzing trace with hash -83146358, now seen corresponding path program 17 times [2021-08-06 20:34:01,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:01,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040476726] [2021-08-06 20:34:01,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:01,766 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:01,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:01,895 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 80.9 percent of original size [2021-08-06 20:34:01,910 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 80.9 percent of original size [2021-08-06 20:34:01,982 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 55, result has 75.1 percent of original size [2021-08-06 20:34:02,001 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 55, result has 75.1 percent of original size [2021-08-06 20:34:02,088 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 40, result has 78.7 percent of original size [2021-08-06 20:34:02,104 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 40, result has 78.7 percent of original size [2021-08-06 20:34:02,150 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 49, result has 74.2 percent of original size [2021-08-06 20:34:02,165 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 49, result has 74.2 percent of original size [2021-08-06 20:34:02,223 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 20:34:02,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:02,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040476726] [2021-08-06 20:34:02,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040476726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:02,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990133712] [2021-08-06 20:34:02,224 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:34:02,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:02,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:02,224 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 20:34:02,225 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 20:34:03,918 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:34:03,919 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:34:03,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:34:03,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:04,686 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:34:04,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 84 [2021-08-06 20:34:05,032 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:34:05,036 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:34:05,340 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:05,341 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:05,346 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 20:34:05,346 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990133712] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:05,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:05,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:34:05,347 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311745287] [2021-08-06 20:34:05,347 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:34:05,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:05,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:34:05,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=301, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:34:05,347 INFO L87 Difference]: Start difference. First operand 390 states and 872 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 20:34:06,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:06,683 INFO L93 Difference]: Finished difference Result 677 states and 1370 transitions. [2021-08-06 20:34:06,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:34:06,684 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-06 20:34:06,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:06,686 INFO L225 Difference]: With dead ends: 677 [2021-08-06 20:34:06,686 INFO L226 Difference]: Without dead ends: 667 [2021-08-06 20:34:06,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 1319.6ms TimeCoverageRelationStatistics Valid=322, Invalid=1238, Unknown=0, NotChecked=0, Total=1560 [2021-08-06 20:34:06,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 667 states. [2021-08-06 20:34:06,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 667 to 396. [2021-08-06 20:34:06,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 395 states have (on average 2.2531645569620253) internal successors, (890), 395 states have internal predecessors, (890), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:06,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 890 transitions. [2021-08-06 20:34:06,694 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 890 transitions. Word has length 26 [2021-08-06 20:34:06,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:06,694 INFO L470 AbstractCegarLoop]: Abstraction has 396 states and 890 transitions. [2021-08-06 20:34:06,694 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 20:34:06,694 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 890 transitions. [2021-08-06 20:34:06,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:06,695 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:06,695 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:34:06,719 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 20:34:06,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:06,905 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:06,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:06,905 INFO L82 PathProgramCache]: Analyzing trace with hash -740427510, now seen corresponding path program 16 times [2021-08-06 20:34:06,905 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:06,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049432257] [2021-08-06 20:34:06,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:06,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:06,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:06,987 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 65.2 percent of original size [2021-08-06 20:34:06,991 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 65.2 percent of original size [2021-08-06 20:34:07,019 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 73.2 percent of original size [2021-08-06 20:34:07,028 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 73.2 percent of original size [2021-08-06 20:34:07,095 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 75.0 percent of original size [2021-08-06 20:34:07,108 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 75.0 percent of original size [2021-08-06 20:34:07,176 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 40, result has 53.5 percent of original size [2021-08-06 20:34:07,181 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 40, result has 53.5 percent of original size [2021-08-06 20:34:07,320 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:07,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:07,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049432257] [2021-08-06 20:34:07,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049432257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:07,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89962132] [2021-08-06 20:34:07,321 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:34:07,321 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:07,321 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:07,322 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 20:34:07,322 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 20:34:09,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:34:09,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:34:09,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 23 conjunts are in the unsatisfiable core [2021-08-06 20:34:09,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:09,832 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-08-06 20:34:09,832 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 123 treesize of output 121 [2021-08-06 20:34:11,588 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 46, result has 58.9 percent of original size [2021-08-06 20:34:11,595 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 46, result has 58.9 percent of original size [2021-08-06 20:34:11,784 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:11,785 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:11,790 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89962132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:11,790 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:11,790 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 20:34:11,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86403652] [2021-08-06 20:34:11,790 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:34:11,790 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:11,791 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:34:11,791 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=305, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:34:11,791 INFO L87 Difference]: Start difference. First operand 396 states and 890 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 20:34:15,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:15,453 INFO L93 Difference]: Finished difference Result 784 states and 1619 transitions. [2021-08-06 20:34:15,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-06 20:34:15,453 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 26 [2021-08-06 20:34:15,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:15,455 INFO L225 Difference]: With dead ends: 784 [2021-08-06 20:34:15,455 INFO L226 Difference]: Without dead ends: 768 [2021-08-06 20:34:15,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1150 ImplicationChecksByTransitivity, 3532.6ms TimeCoverageRelationStatistics Valid=751, Invalid=3031, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 20:34:15,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-08-06 20:34:15,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 447. [2021-08-06 20:34:15,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 447 states, 446 states have (on average 2.273542600896861) internal successors, (1014), 446 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:15,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 447 states to 447 states and 1014 transitions. [2021-08-06 20:34:15,465 INFO L78 Accepts]: Start accepts. Automaton has 447 states and 1014 transitions. Word has length 26 [2021-08-06 20:34:15,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:15,465 INFO L470 AbstractCegarLoop]: Abstraction has 447 states and 1014 transitions. [2021-08-06 20:34:15,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 20:34:15,466 INFO L276 IsEmpty]: Start isEmpty. Operand 447 states and 1014 transitions. [2021-08-06 20:34:15,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:15,467 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:15,467 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:34:15,497 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 20:34:15,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-06 20:34:15,693 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:15,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:15,693 INFO L82 PathProgramCache]: Analyzing trace with hash 2097566798, now seen corresponding path program 18 times [2021-08-06 20:34:15,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:15,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022711162] [2021-08-06 20:34:15,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:15,694 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:15,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:15,785 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 4, result has 96.8 percent of original size [2021-08-06 20:34:15,822 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 4, result has 96.8 percent of original size [2021-08-06 20:34:15,894 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 90.5 percent of original size [2021-08-06 20:34:15,908 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 90.5 percent of original size [2021-08-06 20:34:15,984 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 84.7 percent of original size [2021-08-06 20:34:15,996 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 84.7 percent of original size [2021-08-06 20:34:16,119 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 20:34:16,120 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:16,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022711162] [2021-08-06 20:34:16,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022711162] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:16,120 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2083234126] [2021-08-06 20:34:16,120 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:34:16,120 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:16,120 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:16,121 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 20:34:16,121 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 20:34:17,935 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:34:17,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:34:17,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:34:17,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:18,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:34:18,720 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 94 [2021-08-06 20:34:20,065 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:20,066 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:20,071 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 20:34:20,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2083234126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:20,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:20,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:34:20,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089068062] [2021-08-06 20:34:20,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:34:20,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:20,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:34:20,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=314, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:34:20,072 INFO L87 Difference]: Start difference. First operand 447 states and 1014 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 20:34:21,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:21,870 INFO L93 Difference]: Finished difference Result 658 states and 1372 transitions. [2021-08-06 20:34:21,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-06 20:34:21,871 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-06 20:34:21,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:21,872 INFO L225 Difference]: With dead ends: 658 [2021-08-06 20:34:21,873 INFO L226 Difference]: Without dead ends: 648 [2021-08-06 20:34:21,873 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 443 ImplicationChecksByTransitivity, 1713.8ms TimeCoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:34:21,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 648 states. [2021-08-06 20:34:21,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 648 to 442. [2021-08-06 20:34:21,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 442 states, 441 states have (on average 2.2698412698412698) internal successors, (1001), 441 states have internal predecessors, (1001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:21,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 442 states to 442 states and 1001 transitions. [2021-08-06 20:34:21,881 INFO L78 Accepts]: Start accepts. Automaton has 442 states and 1001 transitions. Word has length 26 [2021-08-06 20:34:21,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:21,881 INFO L470 AbstractCegarLoop]: Abstraction has 442 states and 1001 transitions. [2021-08-06 20:34:21,881 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 20:34:21,881 INFO L276 IsEmpty]: Start isEmpty. Operand 442 states and 1001 transitions. [2021-08-06 20:34:21,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:21,882 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:21,883 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:34:21,917 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 20:34:22,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-06 20:34:22,097 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:22,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:22,097 INFO L82 PathProgramCache]: Analyzing trace with hash -1098279730, now seen corresponding path program 17 times [2021-08-06 20:34:22,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:22,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956445276] [2021-08-06 20:34:22,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:22,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:22,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:22,171 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 74.4 percent of original size [2021-08-06 20:34:22,174 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 74.4 percent of original size [2021-08-06 20:34:22,199 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 72.6 percent of original size [2021-08-06 20:34:22,203 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 72.6 percent of original size [2021-08-06 20:34:22,239 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 74.6 percent of original size [2021-08-06 20:34:22,244 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 74.6 percent of original size [2021-08-06 20:34:22,284 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 52.0 percent of original size [2021-08-06 20:34:22,286 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 52.0 percent of original size [2021-08-06 20:34:22,306 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 73.4 percent of original size [2021-08-06 20:34:22,310 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 73.4 percent of original size [2021-08-06 20:34:22,411 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:22,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:22,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956445276] [2021-08-06 20:34:22,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956445276] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:22,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514640004] [2021-08-06 20:34:22,412 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:34:22,412 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:22,412 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:22,413 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 20:34:22,413 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 20:34:24,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:34:24,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:34:24,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:34:24,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:24,988 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 20:34:24,988 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 100 [2021-08-06 20:34:25,813 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:25,814 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:25,819 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:25,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1514640004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:25,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:25,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-06 20:34:25,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68905151] [2021-08-06 20:34:25,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:34:25,820 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:25,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:34:25,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:34:25,820 INFO L87 Difference]: Start difference. First operand 442 states and 1001 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 20:34:30,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:30,128 INFO L93 Difference]: Finished difference Result 597 states and 1313 transitions. [2021-08-06 20:34:30,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 20:34:30,129 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 26 [2021-08-06 20:34:30,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:30,130 INFO L225 Difference]: With dead ends: 597 [2021-08-06 20:34:30,131 INFO L226 Difference]: Without dead ends: 587 [2021-08-06 20:34:30,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 806 ImplicationChecksByTransitivity, 4094.1ms TimeCoverageRelationStatistics Valid=538, Invalid=2323, Unknown=1, NotChecked=0, Total=2862 [2021-08-06 20:34:30,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 587 states. [2021-08-06 20:34:30,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 587 to 466. [2021-08-06 20:34:30,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 466 states, 465 states have (on average 2.264516129032258) internal successors, (1053), 465 states have internal predecessors, (1053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:30,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 466 states to 466 states and 1053 transitions. [2021-08-06 20:34:30,139 INFO L78 Accepts]: Start accepts. Automaton has 466 states and 1053 transitions. Word has length 26 [2021-08-06 20:34:30,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:30,139 INFO L470 AbstractCegarLoop]: Abstraction has 466 states and 1053 transitions. [2021-08-06 20:34:30,139 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 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 20:34:30,139 INFO L276 IsEmpty]: Start isEmpty. Operand 466 states and 1053 transitions. [2021-08-06 20:34:30,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:30,140 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:30,140 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:34:30,168 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 20:34:30,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-06 20:34:30,354 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:30,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:30,355 INFO L82 PathProgramCache]: Analyzing trace with hash -1634679226, now seen corresponding path program 18 times [2021-08-06 20:34:30,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:30,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [367001160] [2021-08-06 20:34:30,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:30,355 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:30,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:30,419 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 65.3 percent of original size [2021-08-06 20:34:30,422 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 65.3 percent of original size [2021-08-06 20:34:30,444 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 17, result has 72.6 percent of original size [2021-08-06 20:34:30,448 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 17, result has 72.6 percent of original size [2021-08-06 20:34:30,484 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 57.1 percent of original size [2021-08-06 20:34:30,485 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 57.1 percent of original size [2021-08-06 20:34:30,498 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 55.3 percent of original size [2021-08-06 20:34:30,500 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 55.3 percent of original size [2021-08-06 20:34:30,638 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:30,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:30,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [367001160] [2021-08-06 20:34:30,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [367001160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:30,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537306041] [2021-08-06 20:34:30,638 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:34:30,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:30,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:30,641 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 20:34:30,673 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 20:34:32,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:34:32,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:34:32,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:34:32,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:33,529 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:34:33,532 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:34:33,545 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:34:33,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 96 [2021-08-06 20:34:34,941 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:34,942 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:34,947 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:34:34,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537306041] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:34,947 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:34,947 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9] total 19 [2021-08-06 20:34:34,947 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527249672] [2021-08-06 20:34:34,947 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:34:34,947 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:34,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:34:34,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=293, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:34:34,948 INFO L87 Difference]: Start difference. First operand 466 states and 1053 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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 20:34:36,164 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:36,164 INFO L93 Difference]: Finished difference Result 696 states and 1446 transitions. [2021-08-06 20:34:36,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:34:36,164 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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 26 [2021-08-06 20:34:36,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:36,166 INFO L225 Difference]: With dead ends: 696 [2021-08-06 20:34:36,166 INFO L226 Difference]: Without dead ends: 686 [2021-08-06 20:34:36,167 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 603 ImplicationChecksByTransitivity, 1181.6ms TimeCoverageRelationStatistics Valid=383, Invalid=1779, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 20:34:36,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-08-06 20:34:36,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 471. [2021-08-06 20:34:36,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 471 states, 470 states have (on average 2.2680851063829786) internal successors, (1066), 470 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:36,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 471 states to 471 states and 1066 transitions. [2021-08-06 20:34:36,173 INFO L78 Accepts]: Start accepts. Automaton has 471 states and 1066 transitions. Word has length 26 [2021-08-06 20:34:36,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:36,173 INFO L470 AbstractCegarLoop]: Abstraction has 471 states and 1066 transitions. [2021-08-06 20:34:36,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 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 20:34:36,173 INFO L276 IsEmpty]: Start isEmpty. Operand 471 states and 1066 transitions. [2021-08-06 20:34:36,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:36,174 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:36,174 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:34:36,195 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 20:34:36,374 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-06 20:34:36,375 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:36,375 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:36,375 INFO L82 PathProgramCache]: Analyzing trace with hash 1552875658, now seen corresponding path program 19 times [2021-08-06 20:34:36,375 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:36,375 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009588984] [2021-08-06 20:34:36,375 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:36,375 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:36,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:36,478 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 37, result has 51.9 percent of original size [2021-08-06 20:34:36,482 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 37, result has 51.9 percent of original size [2021-08-06 20:34:36,517 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 76.6 percent of original size [2021-08-06 20:34:36,520 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 76.6 percent of original size [2021-08-06 20:34:36,609 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 20:34:36,609 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:36,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009588984] [2021-08-06 20:34:36,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009588984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:36,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [334049855] [2021-08-06 20:34:36,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:34:36,610 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:36,610 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:36,613 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 20:34:36,622 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 20:34:38,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:38,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:34:38,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:39,674 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-06 20:34:39,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 81 [2021-08-06 20:34:39,818 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:39,819 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:39,825 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 20:34:39,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [334049855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:39,825 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:39,825 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 20:34:39,825 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606314562] [2021-08-06 20:34:39,825 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:34:39,825 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:39,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:34:39,826 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:34:39,826 INFO L87 Difference]: Start difference. First operand 471 states and 1066 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 20:34:40,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:40,261 INFO L93 Difference]: Finished difference Result 645 states and 1389 transitions. [2021-08-06 20:34:40,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:34:40,261 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 26 [2021-08-06 20:34:40,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:40,263 INFO L225 Difference]: With dead ends: 645 [2021-08-06 20:34:40,263 INFO L226 Difference]: Without dead ends: 640 [2021-08-06 20:34:40,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 512.1ms TimeCoverageRelationStatistics Valid=134, Invalid=466, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:34:40,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 640 states. [2021-08-06 20:34:40,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 640 to 474. [2021-08-06 20:34:40,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.272727272727273) internal successors, (1075), 473 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:40,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1075 transitions. [2021-08-06 20:34:40,270 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1075 transitions. Word has length 26 [2021-08-06 20:34:40,270 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:40,270 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 1075 transitions. [2021-08-06 20:34:40,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 20:34:40,271 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1075 transitions. [2021-08-06 20:34:40,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:40,272 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:40,272 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:34:40,299 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 20:34:40,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-06 20:34:40,489 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:40,489 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:40,489 INFO L82 PathProgramCache]: Analyzing trace with hash -19509110, now seen corresponding path program 20 times [2021-08-06 20:34:40,489 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:40,489 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005736799] [2021-08-06 20:34:40,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:40,490 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:40,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:40,616 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 37, result has 51.9 percent of original size [2021-08-06 20:34:40,620 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 37, result has 51.9 percent of original size [2021-08-06 20:34:40,654 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 76.6 percent of original size [2021-08-06 20:34:40,657 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 76.6 percent of original size [2021-08-06 20:34:40,740 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 20:34:40,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:40,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005736799] [2021-08-06 20:34:40,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005736799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:40,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1635717223] [2021-08-06 20:34:40,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:34:40,740 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:40,740 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:40,745 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 20:34:40,746 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 20:34:42,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:34:42,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:34:42,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:34:42,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:43,544 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:34:43,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:34:43,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-06 20:34:44,049 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:44,050 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:44,055 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 20:34:44,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1635717223] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:44,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:44,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 20:34:44,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156284153] [2021-08-06 20:34:44,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:34:44,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:44,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:34:44,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:34:44,056 INFO L87 Difference]: Start difference. First operand 474 states and 1075 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 20:34:44,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:44,913 INFO L93 Difference]: Finished difference Result 735 states and 1556 transitions. [2021-08-06 20:34:44,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:34:44,914 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-06 20:34:44,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:44,916 INFO L225 Difference]: With dead ends: 735 [2021-08-06 20:34:44,916 INFO L226 Difference]: Without dead ends: 730 [2021-08-06 20:34:44,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 884.2ms TimeCoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:34:44,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 730 states. [2021-08-06 20:34:44,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 730 to 474. [2021-08-06 20:34:44,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 474 states, 473 states have (on average 2.272727272727273) internal successors, (1075), 473 states have internal predecessors, (1075), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:44,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 474 states to 474 states and 1075 transitions. [2021-08-06 20:34:44,924 INFO L78 Accepts]: Start accepts. Automaton has 474 states and 1075 transitions. Word has length 26 [2021-08-06 20:34:44,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:44,924 INFO L470 AbstractCegarLoop]: Abstraction has 474 states and 1075 transitions. [2021-08-06 20:34:44,924 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 20:34:44,924 INFO L276 IsEmpty]: Start isEmpty. Operand 474 states and 1075 transitions. [2021-08-06 20:34:44,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:44,925 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:44,925 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:34:44,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-08-06 20:34:45,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-06 20:34:45,132 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:45,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:45,132 INFO L82 PathProgramCache]: Analyzing trace with hash -193199286, now seen corresponding path program 21 times [2021-08-06 20:34:45,132 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:45,132 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659512901] [2021-08-06 20:34:45,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:45,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:45,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:45,323 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 76.6 percent of original size [2021-08-06 20:34:45,326 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 76.6 percent of original size [2021-08-06 20:34:45,410 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 20:34:45,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:45,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659512901] [2021-08-06 20:34:45,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659512901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:45,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560859488] [2021-08-06 20:34:45,411 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:34:45,411 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:45,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:45,412 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 20:34:45,412 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 20:34:47,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:34:47,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:34:47,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:34:47,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:48,267 INFO L354 Elim1Store]: treesize reduction 8, result has 68.0 percent of original size [2021-08-06 20:34:48,267 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 122 treesize of output 104 [2021-08-06 20:34:48,911 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 34, result has 68.8 percent of original size [2021-08-06 20:34:48,920 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 34, result has 68.8 percent of original size [2021-08-06 20:34:49,133 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 20:34:49,134 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 50.0 percent of original size [2021-08-06 20:34:49,139 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 20:34:49,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560859488] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:49,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:49,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-06 20:34:49,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694343090] [2021-08-06 20:34:49,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:34:49,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:49,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:34:49,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:34:49,140 INFO L87 Difference]: Start difference. First operand 474 states and 1075 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 20:34:49,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:49,735 INFO L93 Difference]: Finished difference Result 674 states and 1452 transitions. [2021-08-06 20:34:49,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:34:49,735 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 26 [2021-08-06 20:34:49,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:49,737 INFO L225 Difference]: With dead ends: 674 [2021-08-06 20:34:49,737 INFO L226 Difference]: Without dead ends: 669 [2021-08-06 20:34:49,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 709.5ms TimeCoverageRelationStatistics Valid=159, Invalid=441, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:34:49,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 669 states. [2021-08-06 20:34:49,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 669 to 479. [2021-08-06 20:34:49,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 479 states, 478 states have (on average 2.274058577405858) internal successors, (1087), 478 states have internal predecessors, (1087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:49,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 479 states to 479 states and 1087 transitions. [2021-08-06 20:34:49,744 INFO L78 Accepts]: Start accepts. Automaton has 479 states and 1087 transitions. Word has length 26 [2021-08-06 20:34:49,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:49,744 INFO L470 AbstractCegarLoop]: Abstraction has 479 states and 1087 transitions. [2021-08-06 20:34:49,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 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 20:34:49,744 INFO L276 IsEmpty]: Start isEmpty. Operand 479 states and 1087 transitions. [2021-08-06 20:34:49,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:49,745 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:49,745 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:34:49,770 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 20:34:49,955 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-06 20:34:49,955 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:49,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:49,955 INFO L82 PathProgramCache]: Analyzing trace with hash -785003702, now seen corresponding path program 22 times [2021-08-06 20:34:49,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:49,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892825625] [2021-08-06 20:34:49,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:49,956 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:49,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:50,205 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 20:34:50,205 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:50,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892825625] [2021-08-06 20:34:50,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892825625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:50,206 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1509272772] [2021-08-06 20:34:50,206 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:34:50,206 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:50,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:50,206 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 20:34:50,208 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 20:34:52,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:34:52,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:34:52,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:34:52,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:53,382 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:34:53,382 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-06 20:34:53,926 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:53,927 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:34:53,932 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 20:34:53,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1509272772] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:53,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:53,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-06 20:34:53,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603101603] [2021-08-06 20:34:53,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:34:53,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:53,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:34:53,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:34:53,933 INFO L87 Difference]: Start difference. First operand 479 states and 1087 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 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 20:34:54,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:54,355 INFO L93 Difference]: Finished difference Result 655 states and 1422 transitions. [2021-08-06 20:34:54,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:34:54,355 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 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 26 [2021-08-06 20:34:54,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:54,357 INFO L225 Difference]: With dead ends: 655 [2021-08-06 20:34:54,357 INFO L226 Difference]: Without dead ends: 650 [2021-08-06 20:34:54,357 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 535.9ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:34:54,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-08-06 20:34:54,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 485. [2021-08-06 20:34:54,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.274793388429752) internal successors, (1101), 484 states have internal predecessors, (1101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:54,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1101 transitions. [2021-08-06 20:34:54,364 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1101 transitions. Word has length 26 [2021-08-06 20:34:54,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:54,364 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 1101 transitions. [2021-08-06 20:34:54,364 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 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 20:34:54,364 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1101 transitions. [2021-08-06 20:34:54,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:54,365 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:54,365 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:34:54,388 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-06 20:34:54,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-06 20:34:54,567 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:54,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:54,567 INFO L82 PathProgramCache]: Analyzing trace with hash -834692602, now seen corresponding path program 23 times [2021-08-06 20:34:54,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:54,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684810138] [2021-08-06 20:34:54,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:54,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:54,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:54,677 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 118, result has 48.2 percent of original size [2021-08-06 20:34:54,694 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 118, result has 48.2 percent of original size [2021-08-06 20:34:54,780 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 68, result has 66.3 percent of original size [2021-08-06 20:34:54,800 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 68, result has 66.3 percent of original size [2021-08-06 20:34:54,872 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 73, result has 50.0 percent of original size [2021-08-06 20:34:54,879 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 73, result has 50.0 percent of original size [2021-08-06 20:34:54,937 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 20:34:54,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:34:54,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684810138] [2021-08-06 20:34:54,937 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684810138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:54,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1172164264] [2021-08-06 20:34:54,938 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:34:54,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:54,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:34:54,938 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 20:34:54,939 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 20:34:57,280 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:34:57,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:34:57,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-06 20:34:57,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:34:58,126 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:34:58,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 84 [2021-08-06 20:34:58,866 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 20:34:58,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1172164264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:34:58,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:34:58,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:34:58,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982329241] [2021-08-06 20:34:58,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:34:58,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:34:58,867 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:34:58,867 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:34:58,868 INFO L87 Difference]: Start difference. First operand 485 states and 1101 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 20:34:59,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:34:59,349 INFO L93 Difference]: Finished difference Result 640 states and 1396 transitions. [2021-08-06 20:34:59,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-06 20:34:59,349 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-06 20:34:59,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:34:59,351 INFO L225 Difference]: With dead ends: 640 [2021-08-06 20:34:59,351 INFO L226 Difference]: Without dead ends: 635 [2021-08-06 20:34:59,351 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 592.5ms TimeCoverageRelationStatistics Valid=177, Invalid=693, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:34:59,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 635 states. [2021-08-06 20:34:59,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 635 to 491. [2021-08-06 20:34:59,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 491 states, 490 states have (on average 2.2714285714285714) internal successors, (1113), 490 states have internal predecessors, (1113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:34:59,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 491 states to 491 states and 1113 transitions. [2021-08-06 20:34:59,358 INFO L78 Accepts]: Start accepts. Automaton has 491 states and 1113 transitions. Word has length 26 [2021-08-06 20:34:59,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:34:59,358 INFO L470 AbstractCegarLoop]: Abstraction has 491 states and 1113 transitions. [2021-08-06 20:34:59,358 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 20:34:59,358 INFO L276 IsEmpty]: Start isEmpty. Operand 491 states and 1113 transitions. [2021-08-06 20:34:59,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:34:59,359 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:34:59,359 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:34:59,381 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-06 20:34:59,559 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:34:59,559 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:34:59,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:34:59,560 INFO L82 PathProgramCache]: Analyzing trace with hash -337213050, now seen corresponding path program 24 times [2021-08-06 20:34:59,560 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:34:59,560 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124427436] [2021-08-06 20:34:59,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:34:59,560 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:34:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:34:59,669 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 136, result has 51.6 percent of original size [2021-08-06 20:34:59,693 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 136, result has 51.6 percent of original size [2021-08-06 20:34:59,786 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 40, result has 77.0 percent of original size [2021-08-06 20:34:59,804 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 40, result has 77.0 percent of original size [2021-08-06 20:34:59,900 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 75.5 percent of original size [2021-08-06 20:34:59,908 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 75.5 percent of original size [2021-08-06 20:34:59,955 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 74.3 percent of original size [2021-08-06 20:34:59,962 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 74.3 percent of original size [2021-08-06 20:35:00,005 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 46, result has 58.6 percent of original size [2021-08-06 20:35:00,011 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 46, result has 58.6 percent of original size [2021-08-06 20:35:00,053 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 20:35:00,053 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:00,053 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124427436] [2021-08-06 20:35:00,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124427436] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:00,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167501558] [2021-08-06 20:35:00,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:35:00,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:00,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:00,054 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 20:35:00,055 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 20:35:02,535 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:35:02,535 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:02,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-06 20:35:02,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:03,489 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:35:03,490 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 94 [2021-08-06 20:35:03,872 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:35:03,876 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:35:04,489 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:35:04,491 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:35:04,496 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 20:35:04,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167501558] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:04,496 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:04,496 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-06 20:35:04,496 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934076940] [2021-08-06 20:35:04,496 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-06 20:35:04,496 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:04,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-06 20:35:04,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-08-06 20:35:04,497 INFO L87 Difference]: Start difference. First operand 491 states and 1113 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 20:35:06,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:06,622 INFO L93 Difference]: Finished difference Result 695 states and 1465 transitions. [2021-08-06 20:35:06,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:35:06,622 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 26 [2021-08-06 20:35:06,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:06,625 INFO L225 Difference]: With dead ends: 695 [2021-08-06 20:35:06,625 INFO L226 Difference]: Without dead ends: 680 [2021-08-06 20:35:06,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 1886.2ms TimeCoverageRelationStatistics Valid=278, Invalid=1362, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:35:06,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 680 states. [2021-08-06 20:35:06,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 680 to 493. [2021-08-06 20:35:06,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 493 states, 492 states have (on average 2.274390243902439) internal successors, (1119), 492 states have internal predecessors, (1119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:06,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 493 states to 493 states and 1119 transitions. [2021-08-06 20:35:06,633 INFO L78 Accepts]: Start accepts. Automaton has 493 states and 1119 transitions. Word has length 26 [2021-08-06 20:35:06,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:06,633 INFO L470 AbstractCegarLoop]: Abstraction has 493 states and 1119 transitions. [2021-08-06 20:35:06,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 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 20:35:06,633 INFO L276 IsEmpty]: Start isEmpty. Operand 493 states and 1119 transitions. [2021-08-06 20:35:06,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:35:06,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:06,634 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:06,658 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-06 20:35:06,834 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:06,835 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:06,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:06,835 INFO L82 PathProgramCache]: Analyzing trace with hash 1770356998, now seen corresponding path program 19 times [2021-08-06 20:35:06,835 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:06,835 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950294093] [2021-08-06 20:35:06,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:06,835 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:06,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:06,885 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 18, result has 58.1 percent of original size [2021-08-06 20:35:06,888 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 18, result has 58.1 percent of original size [2021-08-06 20:35:06,911 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 11, result has 77.1 percent of original size [2021-08-06 20:35:06,915 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 11, result has 77.1 percent of original size [2021-08-06 20:35:06,949 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 41.5 percent of original size [2021-08-06 20:35:06,951 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 41.5 percent of original size [2021-08-06 20:35:07,051 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:07,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:07,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950294093] [2021-08-06 20:35:07,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [950294093] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:07,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408906689] [2021-08-06 20:35:07,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:35:07,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:07,051 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:07,053 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 20:35:07,084 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 20:35:09,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:09,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:35:09,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:10,629 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-06 20:35:10,629 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 82 [2021-08-06 20:35:10,774 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:35:10,775 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:35:10,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:10,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408906689] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:10,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:10,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 20:35:10,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026924246] [2021-08-06 20:35:10,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:35:10,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:10,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:35:10,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:35:10,781 INFO L87 Difference]: Start difference. First operand 493 states and 1119 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 20:35:11,517 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:11,517 INFO L93 Difference]: Finished difference Result 647 states and 1367 transitions. [2021-08-06 20:35:11,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:35:11,517 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 26 [2021-08-06 20:35:11,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:11,520 INFO L225 Difference]: With dead ends: 647 [2021-08-06 20:35:11,520 INFO L226 Difference]: Without dead ends: 637 [2021-08-06 20:35:11,520 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 782.6ms TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2021-08-06 20:35:11,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 637 states. [2021-08-06 20:35:11,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 637 to 508. [2021-08-06 20:35:11,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 2.2642998027613412) internal successors, (1148), 507 states have internal predecessors, (1148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:11,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1148 transitions. [2021-08-06 20:35:11,549 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1148 transitions. Word has length 26 [2021-08-06 20:35:11,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:11,550 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 1148 transitions. [2021-08-06 20:35:11,550 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 20:35:11,550 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1148 transitions. [2021-08-06 20:35:11,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:35:11,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:11,550 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:11,573 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 20:35:11,751 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-06 20:35:11,751 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:11,752 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:11,752 INFO L82 PathProgramCache]: Analyzing trace with hash 197972230, now seen corresponding path program 20 times [2021-08-06 20:35:11,752 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:11,752 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605143308] [2021-08-06 20:35:11,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:11,752 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:11,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:11,805 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 24, result has 53.8 percent of original size [2021-08-06 20:35:11,809 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 24, result has 53.8 percent of original size [2021-08-06 20:35:11,835 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 66, result has 58.0 percent of original size [2021-08-06 20:35:11,851 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 66, result has 58.0 percent of original size [2021-08-06 20:35:11,908 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 88, result has 54.9 percent of original size [2021-08-06 20:35:11,919 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 88, result has 54.9 percent of original size [2021-08-06 20:35:11,959 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 83, result has 37.1 percent of original size [2021-08-06 20:35:11,962 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 83, result has 37.1 percent of original size [2021-08-06 20:35:11,991 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 83, result has 38.1 percent of original size [2021-08-06 20:35:11,995 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 83, result has 38.1 percent of original size [2021-08-06 20:35:12,046 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:12,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:12,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605143308] [2021-08-06 20:35:12,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605143308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:12,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236105439] [2021-08-06 20:35:12,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:35:12,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:12,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:12,047 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 20:35:12,051 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 20:35:14,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:35:14,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:14,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:35:14,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:15,248 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:35:15,250 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:35:15,263 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:35:15,263 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 110 treesize of output 96 [2021-08-06 20:35:16,115 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:35:16,116 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:35:16,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:16,122 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236105439] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:16,122 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:16,122 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 20:35:16,122 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063797427] [2021-08-06 20:35:16,122 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:35:16,122 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:16,123 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:35:16,123 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:35:16,123 INFO L87 Difference]: Start difference. First operand 508 states and 1148 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 20:35:17,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:17,315 INFO L93 Difference]: Finished difference Result 889 states and 1842 transitions. [2021-08-06 20:35:17,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:35:17,315 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 26 [2021-08-06 20:35:17,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:17,317 INFO L225 Difference]: With dead ends: 889 [2021-08-06 20:35:17,317 INFO L226 Difference]: Without dead ends: 875 [2021-08-06 20:35:17,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1113.2ms TimeCoverageRelationStatistics Valid=316, Invalid=1166, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:35:17,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 875 states. [2021-08-06 20:35:17,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 875 to 513. [2021-08-06 20:35:17,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 513 states, 512 states have (on average 2.265625) internal successors, (1160), 512 states have internal predecessors, (1160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:17,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 513 states to 513 states and 1160 transitions. [2021-08-06 20:35:17,324 INFO L78 Accepts]: Start accepts. Automaton has 513 states and 1160 transitions. Word has length 26 [2021-08-06 20:35:17,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:17,324 INFO L470 AbstractCegarLoop]: Abstraction has 513 states and 1160 transitions. [2021-08-06 20:35:17,324 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 20:35:17,324 INFO L276 IsEmpty]: Start isEmpty. Operand 513 states and 1160 transitions. [2021-08-06 20:35:17,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:35:17,325 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:17,325 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:17,348 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:17,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-06 20:35:17,526 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:17,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:17,526 INFO L82 PathProgramCache]: Analyzing trace with hash -1259000758, now seen corresponding path program 25 times [2021-08-06 20:35:17,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:17,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515684413] [2021-08-06 20:35:17,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:17,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:17,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:17,651 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 88, result has 58.1 percent of original size [2021-08-06 20:35:17,670 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 88, result has 58.1 percent of original size [2021-08-06 20:35:17,738 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 35, result has 79.9 percent of original size [2021-08-06 20:35:17,755 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 35, result has 79.9 percent of original size [2021-08-06 20:35:17,874 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 44, result has 75.0 percent of original size [2021-08-06 20:35:17,886 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 44, result has 75.0 percent of original size [2021-08-06 20:35:17,977 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 49, result has 44.3 percent of original size [2021-08-06 20:35:17,980 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 49, result has 44.3 percent of original size [2021-08-06 20:35:18,031 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 20:35:18,031 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:18,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515684413] [2021-08-06 20:35:18,031 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [515684413] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:18,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1833244648] [2021-08-06 20:35:18,031 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:35:18,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:18,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:18,032 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 20:35:18,033 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 20:35:20,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:20,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:35:20,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:21,352 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-06 20:35:21,352 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-06 20:35:21,586 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:35:21,590 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:35:21,896 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:35:21,897 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:35:21,902 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 20:35:21,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1833244648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:21,903 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:21,903 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-06 20:35:21,903 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395776969] [2021-08-06 20:35:21,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:35:21,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:21,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:35:21,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:35:21,903 INFO L87 Difference]: Start difference. First operand 513 states and 1160 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 20:35:22,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:22,795 INFO L93 Difference]: Finished difference Result 731 states and 1552 transitions. [2021-08-06 20:35:22,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:35:22,795 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 26 [2021-08-06 20:35:22,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:22,796 INFO L225 Difference]: With dead ends: 731 [2021-08-06 20:35:22,796 INFO L226 Difference]: Without dead ends: 721 [2021-08-06 20:35:22,797 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 338 ImplicationChecksByTransitivity, 983.1ms TimeCoverageRelationStatistics Valid=252, Invalid=938, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:35:22,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 721 states. [2021-08-06 20:35:22,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 721 to 515. [2021-08-06 20:35:22,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 515 states, 514 states have (on average 2.262645914396887) internal successors, (1163), 514 states have internal predecessors, (1163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:22,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 515 states to 515 states and 1163 transitions. [2021-08-06 20:35:22,804 INFO L78 Accepts]: Start accepts. Automaton has 515 states and 1163 transitions. Word has length 26 [2021-08-06 20:35:22,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:22,804 INFO L470 AbstractCegarLoop]: Abstraction has 515 states and 1163 transitions. [2021-08-06 20:35:22,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 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 20:35:22,804 INFO L276 IsEmpty]: Start isEmpty. Operand 515 states and 1163 transitions. [2021-08-06 20:35:22,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:35:22,805 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:22,805 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:22,828 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:23,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-06 20:35:23,005 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:23,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:23,006 INFO L82 PathProgramCache]: Analyzing trace with hash -159879990, now seen corresponding path program 21 times [2021-08-06 20:35:23,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:23,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887874347] [2021-08-06 20:35:23,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:23,006 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:23,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:23,056 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 55.1 percent of original size [2021-08-06 20:35:23,059 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 55.1 percent of original size [2021-08-06 20:35:23,079 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 87.9 percent of original size [2021-08-06 20:35:23,085 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 87.9 percent of original size [2021-08-06 20:35:23,129 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 51.9 percent of original size [2021-08-06 20:35:23,132 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 51.9 percent of original size [2021-08-06 20:35:23,152 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 66.7 percent of original size [2021-08-06 20:35:23,156 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 66.7 percent of original size [2021-08-06 20:35:23,186 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 81.0 percent of original size [2021-08-06 20:35:23,188 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 81.0 percent of original size [2021-08-06 20:35:23,289 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:23,289 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:23,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887874347] [2021-08-06 20:35:23,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [887874347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:23,289 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1957868813] [2021-08-06 20:35:23,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:35:23,290 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:23,290 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:23,293 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 20:35:23,294 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 20:35:26,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:35:26,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:26,028 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:35:26,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:26,641 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:35:26,643 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:35:26,656 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:35:26,656 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 116 treesize of output 96 [2021-08-06 20:35:27,401 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:35:27,402 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:35:27,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:27,407 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1957868813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:27,407 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:27,407 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-06 20:35:27,407 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252578202] [2021-08-06 20:35:27,407 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:35:27,407 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:27,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:35:27,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:35:27,408 INFO L87 Difference]: Start difference. First operand 515 states and 1163 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 20:35:28,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:28,491 INFO L93 Difference]: Finished difference Result 734 states and 1576 transitions. [2021-08-06 20:35:28,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:35:28,491 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 26 [2021-08-06 20:35:28,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:28,493 INFO L225 Difference]: With dead ends: 734 [2021-08-06 20:35:28,493 INFO L226 Difference]: Without dead ends: 724 [2021-08-06 20:35:28,493 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 1101.6ms TimeCoverageRelationStatistics Valid=298, Invalid=1108, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:35:28,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 724 states. [2021-08-06 20:35:28,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 724 to 511. [2021-08-06 20:35:28,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.264705882352941) internal successors, (1155), 510 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:28,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1155 transitions. [2021-08-06 20:35:28,500 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1155 transitions. Word has length 26 [2021-08-06 20:35:28,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:28,500 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 1155 transitions. [2021-08-06 20:35:28,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 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 20:35:28,500 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1155 transitions. [2021-08-06 20:35:28,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:35:28,500 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:28,501 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:28,527 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 20:35:28,702 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:28,703 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:28,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:28,703 INFO L82 PathProgramCache]: Analyzing trace with hash 946842442, now seen corresponding path program 26 times [2021-08-06 20:35:28,703 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:28,703 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770135404] [2021-08-06 20:35:28,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:28,703 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:28,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:28,788 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 50.6 percent of original size [2021-08-06 20:35:28,801 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 50.6 percent of original size [2021-08-06 20:35:28,858 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 50.6 percent of original size [2021-08-06 20:35:28,867 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 50.6 percent of original size [2021-08-06 20:35:28,918 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 95.9 percent of original size [2021-08-06 20:35:28,929 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 95.9 percent of original size [2021-08-06 20:35:29,062 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 20:35:29,062 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:29,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770135404] [2021-08-06 20:35:29,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770135404] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:29,062 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419537975] [2021-08-06 20:35:29,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:35:29,062 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:29,062 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:29,064 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 20:35:29,064 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 20:35:31,837 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:35:31,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:31,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-06 20:35:31,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:32,460 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:35:32,466 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:35:32,466 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-06 20:35:33,092 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:35:33,094 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:35:33,099 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 20:35:33,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419537975] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:33,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:33,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-06 20:35:33,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1291798101] [2021-08-06 20:35:33,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-06 20:35:33,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:33,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-06 20:35:33,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:35:33,099 INFO L87 Difference]: Start difference. First operand 511 states and 1155 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 20:35:33,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:33,856 INFO L93 Difference]: Finished difference Result 695 states and 1510 transitions. [2021-08-06 20:35:33,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:35:33,856 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 26 [2021-08-06 20:35:33,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:33,858 INFO L225 Difference]: With dead ends: 695 [2021-08-06 20:35:33,858 INFO L226 Difference]: Without dead ends: 690 [2021-08-06 20:35:33,858 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 816.1ms TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:35:33,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 690 states. [2021-08-06 20:35:33,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 690 to 511. [2021-08-06 20:35:33,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 511 states, 510 states have (on average 2.264705882352941) internal successors, (1155), 510 states have internal predecessors, (1155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:33,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 511 states to 511 states and 1155 transitions. [2021-08-06 20:35:33,866 INFO L78 Accepts]: Start accepts. Automaton has 511 states and 1155 transitions. Word has length 26 [2021-08-06 20:35:33,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:33,866 INFO L470 AbstractCegarLoop]: Abstraction has 511 states and 1155 transitions. [2021-08-06 20:35:33,867 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 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 20:35:33,867 INFO L276 IsEmpty]: Start isEmpty. Operand 511 states and 1155 transitions. [2021-08-06 20:35:33,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-06 20:35:33,868 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:33,868 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:33,902 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:34,080 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-06 20:35:34,081 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:34,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:34,081 INFO L82 PathProgramCache]: Analyzing trace with hash 639945674, now seen corresponding path program 22 times [2021-08-06 20:35:34,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:34,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85270422] [2021-08-06 20:35:34,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:34,081 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:34,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:34,128 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 21, result has 54.3 percent of original size [2021-08-06 20:35:34,131 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 21, result has 54.3 percent of original size [2021-08-06 20:35:34,154 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 74.5 percent of original size [2021-08-06 20:35:34,158 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 74.5 percent of original size [2021-08-06 20:35:34,195 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 76.7 percent of original size [2021-08-06 20:35:34,200 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 76.7 percent of original size [2021-08-06 20:35:34,240 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 91.9 percent of original size [2021-08-06 20:35:34,247 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 91.9 percent of original size [2021-08-06 20:35:34,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:34,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:34,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85270422] [2021-08-06 20:35:34,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85270422] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:34,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [147958625] [2021-08-06 20:35:34,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:35:34,356 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:34,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:34,357 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 20:35:34,359 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 20:35:37,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:35:37,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:37,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 25 conjunts are in the unsatisfiable core [2021-08-06 20:35:37,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:38,063 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-06 20:35:38,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 120 treesize of output 100 [2021-08-06 20:35:39,151 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:35:39,153 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:35:39,157 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:39,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [147958625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:39,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:39,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 20:35:39,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864834443] [2021-08-06 20:35:39,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-06 20:35:39,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:39,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-06 20:35:39,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:35:39,158 INFO L87 Difference]: Start difference. First operand 511 states and 1155 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 20:35:39,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:39,862 INFO L93 Difference]: Finished difference Result 704 states and 1512 transitions. [2021-08-06 20:35:39,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-06 20:35:39,862 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 26 [2021-08-06 20:35:39,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:39,863 INFO L225 Difference]: With dead ends: 704 [2021-08-06 20:35:39,863 INFO L226 Difference]: Without dead ends: 694 [2021-08-06 20:35:39,864 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 772.4ms TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:35:39,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 694 states. [2021-08-06 20:35:39,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 694 to 508. [2021-08-06 20:35:39,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 2.258382642998028) internal successors, (1145), 507 states have internal predecessors, (1145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:39,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 1145 transitions. [2021-08-06 20:35:39,873 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 1145 transitions. Word has length 26 [2021-08-06 20:35:39,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:39,873 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 1145 transitions. [2021-08-06 20:35:39,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 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 20:35:39,873 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 1145 transitions. [2021-08-06 20:35:39,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:35:39,874 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:39,874 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:39,898 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 20:35:40,074 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:40,075 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:40,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:40,075 INFO L82 PathProgramCache]: Analyzing trace with hash 1982319532, now seen corresponding path program 27 times [2021-08-06 20:35:40,075 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:40,075 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013794656] [2021-08-06 20:35:40,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:40,075 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:40,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:40,150 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:40,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:40,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013794656] [2021-08-06 20:35:40,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013794656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:40,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874888277] [2021-08-06 20:35:40,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:35:40,151 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:40,151 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:40,152 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 20:35:40,154 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 20:35:43,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:35:43,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:43,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:35:43,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:43,333 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:35:43,333 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:35:43,355 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:43,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874888277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:43,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:43,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-06 20:35:43,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430611039] [2021-08-06 20:35:43,356 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:35:43,356 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:43,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:35:43,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:35:43,356 INFO L87 Difference]: Start difference. First operand 508 states and 1145 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:43,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:43,909 INFO L93 Difference]: Finished difference Result 1048 states and 2131 transitions. [2021-08-06 20:35:43,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 20:35:43,909 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:35:43,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:43,911 INFO L225 Difference]: With dead ends: 1048 [2021-08-06 20:35:43,911 INFO L226 Difference]: Without dead ends: 1048 [2021-08-06 20:35:43,912 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 431.3ms TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 20:35:43,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1048 states. [2021-08-06 20:35:43,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1048 to 568. [2021-08-06 20:35:43,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 568 states, 567 states have (on average 2.2874779541446206) internal successors, (1297), 567 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:43,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 568 states to 568 states and 1297 transitions. [2021-08-06 20:35:43,921 INFO L78 Accepts]: Start accepts. Automaton has 568 states and 1297 transitions. Word has length 28 [2021-08-06 20:35:43,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:43,921 INFO L470 AbstractCegarLoop]: Abstraction has 568 states and 1297 transitions. [2021-08-06 20:35:43,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:43,921 INFO L276 IsEmpty]: Start isEmpty. Operand 568 states and 1297 transitions. [2021-08-06 20:35:43,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:35:43,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:43,922 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:43,950 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-06 20:35:44,131 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-06 20:35:44,131 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:44,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:44,131 INFO L82 PathProgramCache]: Analyzing trace with hash 490824620, now seen corresponding path program 28 times [2021-08-06 20:35:44,131 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:44,131 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462476603] [2021-08-06 20:35:44,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:44,131 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:44,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:44,210 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:44,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:44,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462476603] [2021-08-06 20:35:44,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462476603] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:44,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508436735] [2021-08-06 20:35:44,211 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:35:44,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:44,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:44,212 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 20:35:44,243 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 20:35:47,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:35:47,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:47,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:35:47,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:47,552 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:35:47,553 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:35:47,574 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:47,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508436735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:47,575 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:47,575 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-06 20:35:47,575 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1828479925] [2021-08-06 20:35:47,575 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:35:47,575 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:47,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:35:47,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:35:47,575 INFO L87 Difference]: Start difference. First operand 568 states and 1297 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 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 20:35:48,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:48,411 INFO L93 Difference]: Finished difference Result 1194 states and 2361 transitions. [2021-08-06 20:35:48,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 20:35:48,411 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 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 28 [2021-08-06 20:35:48,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:48,413 INFO L225 Difference]: With dead ends: 1194 [2021-08-06 20:35:48,413 INFO L226 Difference]: Without dead ends: 1194 [2021-08-06 20:35:48,414 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 608.5ms TimeCoverageRelationStatistics Valid=826, Invalid=3206, Unknown=0, NotChecked=0, Total=4032 [2021-08-06 20:35:48,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-08-06 20:35:48,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 572. [2021-08-06 20:35:48,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.2714535901926447) internal successors, (1297), 571 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:48,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1297 transitions. [2021-08-06 20:35:48,423 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1297 transitions. Word has length 28 [2021-08-06 20:35:48,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:48,423 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 1297 transitions. [2021-08-06 20:35:48,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 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 20:35:48,424 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1297 transitions. [2021-08-06 20:35:48,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:35:48,424 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:48,424 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:48,448 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 20:35:48,625 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-06 20:35:48,625 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:48,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:48,625 INFO L82 PathProgramCache]: Analyzing trace with hash 132571948, now seen corresponding path program 23 times [2021-08-06 20:35:48,625 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:48,625 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1467042669] [2021-08-06 20:35:48,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:48,626 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:48,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:48,749 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:48,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:48,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1467042669] [2021-08-06 20:35:48,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1467042669] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:48,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292176370] [2021-08-06 20:35:48,749 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:35:48,749 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:48,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:48,753 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 20:35:48,754 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 20:35:51,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:35:51,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:51,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:35:51,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:52,046 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:35:52,046 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:35:52,071 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:52,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292176370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:52,071 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:52,071 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-06 20:35:52,071 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778075288] [2021-08-06 20:35:52,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:35:52,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:52,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:35:52,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:35:52,072 INFO L87 Difference]: Start difference. First operand 572 states and 1297 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:52,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:52,433 INFO L93 Difference]: Finished difference Result 931 states and 1922 transitions. [2021-08-06 20:35:52,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-06 20:35:52,434 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:35:52,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:52,435 INFO L225 Difference]: With dead ends: 931 [2021-08-06 20:35:52,435 INFO L226 Difference]: Without dead ends: 931 [2021-08-06 20:35:52,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 336.9ms TimeCoverageRelationStatistics Valid=310, Invalid=1096, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:35:52,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 931 states. [2021-08-06 20:35:52,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 931 to 572. [2021-08-06 20:35:52,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 572 states, 571 states have (on average 2.2714535901926447) internal successors, (1297), 571 states have internal predecessors, (1297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:52,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 572 states to 572 states and 1297 transitions. [2021-08-06 20:35:52,444 INFO L78 Accepts]: Start accepts. Automaton has 572 states and 1297 transitions. Word has length 28 [2021-08-06 20:35:52,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:52,445 INFO L470 AbstractCegarLoop]: Abstraction has 572 states and 1297 transitions. [2021-08-06 20:35:52,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:52,445 INFO L276 IsEmpty]: Start isEmpty. Operand 572 states and 1297 transitions. [2021-08-06 20:35:52,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:35:52,445 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:52,445 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:52,470 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 20:35:52,646 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:52,646 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:52,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:52,646 INFO L82 PathProgramCache]: Analyzing trace with hash -1872794840, now seen corresponding path program 29 times [2021-08-06 20:35:52,646 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:52,647 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620558483] [2021-08-06 20:35:52,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:52,647 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:52,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:52,714 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:35:52,715 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:52,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620558483] [2021-08-06 20:35:52,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620558483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:52,715 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036863176] [2021-08-06 20:35:52,715 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:35:52,715 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:52,715 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:52,716 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 20:35:52,719 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 20:35:55,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:35:55,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:55,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:35:55,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:55,901 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:35:55,902 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:35:55,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:35:55,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036863176] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:55,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:55,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 20:35:55,944 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384031238] [2021-08-06 20:35:55,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:35:55,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:55,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:35:55,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:35:55,945 INFO L87 Difference]: Start difference. First operand 572 states and 1297 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 20:35:56,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:56,048 INFO L93 Difference]: Finished difference Result 889 states and 1905 transitions. [2021-08-06 20:35:56,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-06 20:35:56,048 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 28 [2021-08-06 20:35:56,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:56,050 INFO L225 Difference]: With dead ends: 889 [2021-08-06 20:35:56,050 INFO L226 Difference]: Without dead ends: 889 [2021-08-06 20:35:56,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 81.5ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:35:56,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 889 states. [2021-08-06 20:35:56,059 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 889 to 756. [2021-08-06 20:35:56,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 756 states, 755 states have (on average 2.2675496688741723) internal successors, (1712), 755 states have internal predecessors, (1712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:56,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 756 states to 756 states and 1712 transitions. [2021-08-06 20:35:56,061 INFO L78 Accepts]: Start accepts. Automaton has 756 states and 1712 transitions. Word has length 28 [2021-08-06 20:35:56,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:56,061 INFO L470 AbstractCegarLoop]: Abstraction has 756 states and 1712 transitions. [2021-08-06 20:35:56,061 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 20:35:56,061 INFO L276 IsEmpty]: Start isEmpty. Operand 756 states and 1712 transitions. [2021-08-06 20:35:56,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:35:56,063 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:56,063 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:56,092 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-06 20:35:56,289 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-06 20:35:56,289 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:35:56,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:35:56,289 INFO L82 PathProgramCache]: Analyzing trace with hash 572424872, now seen corresponding path program 30 times [2021-08-06 20:35:56,289 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:35:56,289 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254868625] [2021-08-06 20:35:56,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:35:56,290 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:35:56,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:35:56,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:56,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:35:56,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254868625] [2021-08-06 20:35:56,357 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254868625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:56,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970153606] [2021-08-06 20:35:56,357 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:35:56,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:35:56,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:35:56,361 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 20:35:56,376 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 20:35:59,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:35:59,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:35:59,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:35:59,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:35:59,567 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:35:59,568 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:35:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:35:59,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970153606] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:35:59,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:35:59,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 20:35:59,597 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609748293] [2021-08-06 20:35:59,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:35:59,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:35:59,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:35:59,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:35:59,597 INFO L87 Difference]: Start difference. First operand 756 states and 1712 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 20:35:59,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:35:59,944 INFO L93 Difference]: Finished difference Result 1070 states and 2204 transitions. [2021-08-06 20:35:59,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:35:59,944 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 28 [2021-08-06 20:35:59,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:35:59,946 INFO L225 Difference]: With dead ends: 1070 [2021-08-06 20:35:59,946 INFO L226 Difference]: Without dead ends: 1052 [2021-08-06 20:35:59,946 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 249.2ms TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:35:59,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1052 states. [2021-08-06 20:35:59,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1052 to 825. [2021-08-06 20:35:59,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 825 states, 824 states have (on average 2.2657766990291264) internal successors, (1867), 824 states have internal predecessors, (1867), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:35:59,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 825 states to 825 states and 1867 transitions. [2021-08-06 20:35:59,957 INFO L78 Accepts]: Start accepts. Automaton has 825 states and 1867 transitions. Word has length 28 [2021-08-06 20:35:59,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:35:59,957 INFO L470 AbstractCegarLoop]: Abstraction has 825 states and 1867 transitions. [2021-08-06 20:35:59,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 20:35:59,957 INFO L276 IsEmpty]: Start isEmpty. Operand 825 states and 1867 transitions. [2021-08-06 20:35:59,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:35:59,958 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:35:59,958 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:35:59,982 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-06 20:36:00,159 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-06 20:36:00,159 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:00,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:00,159 INFO L82 PathProgramCache]: Analyzing trace with hash 1081457192, now seen corresponding path program 24 times [2021-08-06 20:36:00,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:00,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496119248] [2021-08-06 20:36:00,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:00,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:00,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:00,237 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:00,237 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:00,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496119248] [2021-08-06 20:36:00,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496119248] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:00,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095279648] [2021-08-06 20:36:00,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:36:00,238 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:00,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:00,239 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 20:36:00,240 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 20:36:03,229 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:36:03,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:03,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:36:03,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:03,468 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:03,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095279648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:03,468 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:03,468 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-06 20:36:03,468 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1748806338] [2021-08-06 20:36:03,468 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-06 20:36:03,468 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:03,469 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-06 20:36:03,469 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:36:03,469 INFO L87 Difference]: Start difference. First operand 825 states and 1867 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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 20:36:03,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:03,798 INFO L93 Difference]: Finished difference Result 1560 states and 3167 transitions. [2021-08-06 20:36:03,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-06 20:36:03,798 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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 28 [2021-08-06 20:36:03,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:03,825 INFO L225 Difference]: With dead ends: 1560 [2021-08-06 20:36:03,825 INFO L226 Difference]: Without dead ends: 1544 [2021-08-06 20:36:03,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 302.2ms TimeCoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:36:03,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1544 states. [2021-08-06 20:36:03,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1544 to 1053. [2021-08-06 20:36:03,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 2.283269961977186) internal successors, (2402), 1052 states have internal predecessors, (2402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:03,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 2402 transitions. [2021-08-06 20:36:03,839 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 2402 transitions. Word has length 28 [2021-08-06 20:36:03,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:03,839 INFO L470 AbstractCegarLoop]: Abstraction has 1053 states and 2402 transitions. [2021-08-06 20:36:03,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 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 20:36:03,840 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 2402 transitions. [2021-08-06 20:36:03,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:03,841 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:03,841 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:03,879 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:04,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:04,069 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:04,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:04,069 INFO L82 PathProgramCache]: Analyzing trace with hash 2135177896, now seen corresponding path program 31 times [2021-08-06 20:36:04,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:04,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [10647730] [2021-08-06 20:36:04,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:04,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:04,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:04,144 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:04,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:04,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [10647730] [2021-08-06 20:36:04,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [10647730] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:04,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285598826] [2021-08-06 20:36:04,145 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:36:04,145 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:04,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:04,146 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 20:36:04,147 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 20:36:07,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:07,273 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:07,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:07,464 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:07,465 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:07,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:07,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285598826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:07,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:07,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 20:36:07,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [458575553] [2021-08-06 20:36:07,494 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:36:07,494 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:07,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:36:07,494 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:36:07,494 INFO L87 Difference]: Start difference. First operand 1053 states and 2402 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:07,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:07,878 INFO L93 Difference]: Finished difference Result 1472 states and 2984 transitions. [2021-08-06 20:36:07,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:36:07,878 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:36:07,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:07,881 INFO L225 Difference]: With dead ends: 1472 [2021-08-06 20:36:07,881 INFO L226 Difference]: Without dead ends: 1460 [2021-08-06 20:36:07,881 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 300.2ms TimeCoverageRelationStatistics Valid=334, Invalid=788, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:36:07,882 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1460 states. [2021-08-06 20:36:07,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1460 to 1065. [2021-08-06 20:36:07,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1065 states, 1064 states have (on average 2.289473684210526) internal successors, (2436), 1064 states have internal predecessors, (2436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:07,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1065 states to 1065 states and 2436 transitions. [2021-08-06 20:36:07,896 INFO L78 Accepts]: Start accepts. Automaton has 1065 states and 2436 transitions. Word has length 28 [2021-08-06 20:36:07,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:07,897 INFO L470 AbstractCegarLoop]: Abstraction has 1065 states and 2436 transitions. [2021-08-06 20:36:07,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:07,897 INFO L276 IsEmpty]: Start isEmpty. Operand 1065 states and 2436 transitions. [2021-08-06 20:36:07,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:07,898 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:07,898 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:07,922 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 20:36:08,098 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:08,099 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:08,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:08,099 INFO L82 PathProgramCache]: Analyzing trace with hash -629673304, now seen corresponding path program 32 times [2021-08-06 20:36:08,099 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:08,099 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [402476410] [2021-08-06 20:36:08,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:08,099 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:08,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:08,187 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:08,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:08,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [402476410] [2021-08-06 20:36:08,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [402476410] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:08,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186141856] [2021-08-06 20:36:08,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:36:08,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:08,187 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:08,188 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 20:36:08,189 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 20:36:11,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:36:11,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:11,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:11,227 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:11,435 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:11,436 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:11,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:11,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186141856] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:11,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:11,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 20:36:11,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864189634] [2021-08-06 20:36:11,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:36:11,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:11,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:36:11,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:36:11,477 INFO L87 Difference]: Start difference. First operand 1065 states and 2436 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:11,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:11,912 INFO L93 Difference]: Finished difference Result 1436 states and 2944 transitions. [2021-08-06 20:36:11,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-06 20:36:11,913 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:36:11,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:11,916 INFO L225 Difference]: With dead ends: 1436 [2021-08-06 20:36:11,916 INFO L226 Difference]: Without dead ends: 1422 [2021-08-06 20:36:11,916 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 330.1ms TimeCoverageRelationStatistics Valid=360, Invalid=900, Unknown=0, NotChecked=0, Total=1260 [2021-08-06 20:36:11,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-08-06 20:36:11,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 1053. [2021-08-06 20:36:11,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1053 states, 1052 states have (on average 2.300380228136882) internal successors, (2420), 1052 states have internal predecessors, (2420), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:11,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1053 states to 1053 states and 2420 transitions. [2021-08-06 20:36:11,937 INFO L78 Accepts]: Start accepts. Automaton has 1053 states and 2420 transitions. Word has length 28 [2021-08-06 20:36:11,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:11,937 INFO L470 AbstractCegarLoop]: Abstraction has 1053 states and 2420 transitions. [2021-08-06 20:36:11,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:11,938 INFO L276 IsEmpty]: Start isEmpty. Operand 1053 states and 2420 transitions. [2021-08-06 20:36:11,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:11,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:11,939 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:11,973 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:12,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:12,165 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:12,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:12,165 INFO L82 PathProgramCache]: Analyzing trace with hash 94771880, now seen corresponding path program 33 times [2021-08-06 20:36:12,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:12,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097947194] [2021-08-06 20:36:12,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:12,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:12,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:12,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:12,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:12,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097947194] [2021-08-06 20:36:12,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097947194] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:12,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513365416] [2021-08-06 20:36:12,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:36:12,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:12,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:12,260 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 20:36:12,261 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 20:36:15,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:36:15,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:15,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:15,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:15,425 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:15,426 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:15,455 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:15,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513365416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:15,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:15,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:36:15,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051986485] [2021-08-06 20:36:15,455 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:36:15,455 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:15,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:36:15,456 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:36:15,456 INFO L87 Difference]: Start difference. First operand 1053 states and 2420 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:36:15,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:15,758 INFO L93 Difference]: Finished difference Result 1537 states and 3139 transitions. [2021-08-06 20:36:15,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:36:15,759 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:36:15,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:15,761 INFO L225 Difference]: With dead ends: 1537 [2021-08-06 20:36:15,761 INFO L226 Difference]: Without dead ends: 1525 [2021-08-06 20:36:15,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 218.5ms TimeCoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:36:15,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1525 states. [2021-08-06 20:36:15,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1525 to 1061. [2021-08-06 20:36:15,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1061 states, 1060 states have (on average 2.3075471698113206) internal successors, (2446), 1060 states have internal predecessors, (2446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:15,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1061 states to 1061 states and 2446 transitions. [2021-08-06 20:36:15,784 INFO L78 Accepts]: Start accepts. Automaton has 1061 states and 2446 transitions. Word has length 28 [2021-08-06 20:36:15,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:15,784 INFO L470 AbstractCegarLoop]: Abstraction has 1061 states and 2446 transitions. [2021-08-06 20:36:15,784 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:36:15,784 INFO L276 IsEmpty]: Start isEmpty. Operand 1061 states and 2446 transitions. [2021-08-06 20:36:15,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:15,786 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:15,786 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:15,825 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:16,012 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-06 20:36:16,013 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:16,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:16,013 INFO L82 PathProgramCache]: Analyzing trace with hash 1148492584, now seen corresponding path program 34 times [2021-08-06 20:36:16,013 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:16,013 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391206493] [2021-08-06 20:36:16,013 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:16,013 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:16,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:36:16,067 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:16,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391206493] [2021-08-06 20:36:16,067 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391206493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:16,067 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578251535] [2021-08-06 20:36:16,067 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:36:16,067 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:16,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:16,074 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 20:36:16,100 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 20:36:19,245 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:36:19,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:19,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:36:19,246 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:19,387 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:19,388 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:19,430 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:36:19,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578251535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:19,430 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:19,430 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-06 20:36:19,430 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304738382] [2021-08-06 20:36:19,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:36:19,431 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:19,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:36:19,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:36:19,431 INFO L87 Difference]: Start difference. First operand 1061 states and 2446 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 20:36:19,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:19,529 INFO L93 Difference]: Finished difference Result 1202 states and 2634 transitions. [2021-08-06 20:36:19,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:36:19,529 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 28 [2021-08-06 20:36:19,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:19,531 INFO L225 Difference]: With dead ends: 1202 [2021-08-06 20:36:19,531 INFO L226 Difference]: Without dead ends: 1202 [2021-08-06 20:36:19,532 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 78.9ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:36:19,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1202 states. [2021-08-06 20:36:19,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1202 to 984. [2021-08-06 20:36:19,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 984 states, 983 states have (on average 2.304170905391658) internal successors, (2265), 983 states have internal predecessors, (2265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:19,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 984 states to 984 states and 2265 transitions. [2021-08-06 20:36:19,549 INFO L78 Accepts]: Start accepts. Automaton has 984 states and 2265 transitions. Word has length 28 [2021-08-06 20:36:19,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:19,549 INFO L470 AbstractCegarLoop]: Abstraction has 984 states and 2265 transitions. [2021-08-06 20:36:19,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 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 20:36:19,549 INFO L276 IsEmpty]: Start isEmpty. Operand 984 states and 2265 transitions. [2021-08-06 20:36:19,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:19,551 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:19,551 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:19,587 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 20:36:19,772 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-06 20:36:19,773 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:19,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:19,773 INFO L82 PathProgramCache]: Analyzing trace with hash 603675560, now seen corresponding path program 35 times [2021-08-06 20:36:19,773 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:19,773 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789459174] [2021-08-06 20:36:19,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:19,773 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:19,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:19,845 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:19,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:19,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789459174] [2021-08-06 20:36:19,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789459174] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:19,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126610787] [2021-08-06 20:36:19,845 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:36:19,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:19,846 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:19,846 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-06 20:36:19,851 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 20:36:22,939 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:36:22,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:22,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:36:22,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:23,157 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:23,158 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:23,180 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:23,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1126610787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:23,180 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:23,180 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-06 20:36:23,180 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137944756] [2021-08-06 20:36:23,180 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:36:23,180 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:23,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:36:23,181 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:36:23,181 INFO L87 Difference]: Start difference. First operand 984 states and 2265 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) 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 20:36:23,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:23,962 INFO L93 Difference]: Finished difference Result 2945 states and 5951 transitions. [2021-08-06 20:36:23,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 20:36:23,963 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) 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 28 [2021-08-06 20:36:23,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:23,969 INFO L225 Difference]: With dead ends: 2945 [2021-08-06 20:36:23,969 INFO L226 Difference]: Without dead ends: 2945 [2021-08-06 20:36:23,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 556.6ms TimeCoverageRelationStatistics Valid=827, Invalid=2955, Unknown=0, NotChecked=0, Total=3782 [2021-08-06 20:36:23,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2945 states. [2021-08-06 20:36:23,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2945 to 925. [2021-08-06 20:36:23,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 925 states, 924 states have (on average 2.279220779220779) internal successors, (2106), 924 states have internal predecessors, (2106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:23,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 925 states to 925 states and 2106 transitions. [2021-08-06 20:36:23,996 INFO L78 Accepts]: Start accepts. Automaton has 925 states and 2106 transitions. Word has length 28 [2021-08-06 20:36:23,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:23,996 INFO L470 AbstractCegarLoop]: Abstraction has 925 states and 2106 transitions. [2021-08-06 20:36:23,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) 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 20:36:23,996 INFO L276 IsEmpty]: Start isEmpty. Operand 925 states and 2106 transitions. [2021-08-06 20:36:23,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:23,998 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:23,998 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:24,035 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:24,220 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-06 20:36:24,221 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:24,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:24,221 INFO L82 PathProgramCache]: Analyzing trace with hash 861498024, now seen corresponding path program 36 times [2021-08-06 20:36:24,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:24,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510330330] [2021-08-06 20:36:24,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:24,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:24,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:24,295 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:24,295 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:24,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510330330] [2021-08-06 20:36:24,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1510330330] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:24,296 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915912453] [2021-08-06 20:36:24,296 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:36:24,296 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:24,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:24,297 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 20:36:24,298 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 20:36:27,412 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:36:27,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:27,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:27,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:27,567 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:27,568 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:27,596 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:27,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915912453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:27,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:27,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:36:27,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016369748] [2021-08-06 20:36:27,597 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:36:27,597 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:27,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:36:27,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:36:27,597 INFO L87 Difference]: Start difference. First operand 925 states and 2106 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:36:27,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:27,955 INFO L93 Difference]: Finished difference Result 1458 states and 2981 transitions. [2021-08-06 20:36:27,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:36:27,955 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:36:27,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:27,957 INFO L225 Difference]: With dead ends: 1458 [2021-08-06 20:36:27,957 INFO L226 Difference]: Without dead ends: 1454 [2021-08-06 20:36:27,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 256.9ms TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-08-06 20:36:27,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1454 states. [2021-08-06 20:36:27,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1454 to 993. [2021-08-06 20:36:27,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 993 states, 992 states have (on average 2.308467741935484) internal successors, (2290), 992 states have internal predecessors, (2290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:27,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 993 states to 993 states and 2290 transitions. [2021-08-06 20:36:27,972 INFO L78 Accepts]: Start accepts. Automaton has 993 states and 2290 transitions. Word has length 28 [2021-08-06 20:36:27,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:27,972 INFO L470 AbstractCegarLoop]: Abstraction has 993 states and 2290 transitions. [2021-08-06 20:36:27,972 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:36:27,972 INFO L276 IsEmpty]: Start isEmpty. Operand 993 states and 2290 transitions. [2021-08-06 20:36:27,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:27,974 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:27,974 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:28,006 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 20:36:28,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:28,201 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:28,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:28,201 INFO L82 PathProgramCache]: Analyzing trace with hash -710886744, now seen corresponding path program 37 times [2021-08-06 20:36:28,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:28,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549118502] [2021-08-06 20:36:28,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:28,202 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:28,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:28,385 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:28,385 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:28,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549118502] [2021-08-06 20:36:28,385 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549118502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:28,385 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506567655] [2021-08-06 20:36:28,385 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:36:28,385 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:28,386 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:28,401 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 20:36:28,413 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 20:36:31,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:31,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:31,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:31,731 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:31,732 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:31,767 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:31,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506567655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:31,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:31,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:36:31,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677004381] [2021-08-06 20:36:31,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:36:31,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:31,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:36:31,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:36:31,768 INFO L87 Difference]: Start difference. First operand 993 states and 2290 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:36:32,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:32,227 INFO L93 Difference]: Finished difference Result 1486 states and 3046 transitions. [2021-08-06 20:36:32,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:36:32,227 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:36:32,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:32,229 INFO L225 Difference]: With dead ends: 1486 [2021-08-06 20:36:32,229 INFO L226 Difference]: Without dead ends: 1486 [2021-08-06 20:36:32,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 336.8ms TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2021-08-06 20:36:32,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1486 states. [2021-08-06 20:36:32,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1486 to 928. [2021-08-06 20:36:32,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 928 states, 927 states have (on average 2.29126213592233) internal successors, (2124), 927 states have internal predecessors, (2124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:32,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 928 states to 928 states and 2124 transitions. [2021-08-06 20:36:32,247 INFO L78 Accepts]: Start accepts. Automaton has 928 states and 2124 transitions. Word has length 28 [2021-08-06 20:36:32,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:32,247 INFO L470 AbstractCegarLoop]: Abstraction has 928 states and 2124 transitions. [2021-08-06 20:36:32,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:36:32,247 INFO L276 IsEmpty]: Start isEmpty. Operand 928 states and 2124 transitions. [2021-08-06 20:36:32,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:32,249 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:32,249 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:32,281 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 20:36:32,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:32,473 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:32,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:32,473 INFO L82 PathProgramCache]: Analyzing trace with hash 2125030056, now seen corresponding path program 38 times [2021-08-06 20:36:32,473 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:32,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874801218] [2021-08-06 20:36:32,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:32,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:32,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:32,533 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:32,533 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:32,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874801218] [2021-08-06 20:36:32,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [874801218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:32,533 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614884273] [2021-08-06 20:36:32,533 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:36:32,533 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:32,533 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:32,534 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 20:36:32,535 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 20:36:35,653 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:36:35,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:35,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:35,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:35,834 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:35,834 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:35,871 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:35,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614884273] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:35,871 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:35,871 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 20:36:35,871 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706814991] [2021-08-06 20:36:35,871 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:36:35,871 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:35,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:36:35,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:36:35,872 INFO L87 Difference]: Start difference. First operand 928 states and 2124 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:36,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:36,333 INFO L93 Difference]: Finished difference Result 1503 states and 3128 transitions. [2021-08-06 20:36:36,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:36:36,333 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:36:36,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:36,335 INFO L225 Difference]: With dead ends: 1503 [2021-08-06 20:36:36,335 INFO L226 Difference]: Without dead ends: 1501 [2021-08-06 20:36:36,335 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 328.9ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-08-06 20:36:36,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1501 states. [2021-08-06 20:36:36,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1501 to 1063. [2021-08-06 20:36:36,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1063 states, 1062 states have (on average 2.297551789077213) internal successors, (2440), 1062 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 20:36:36,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1063 states to 1063 states and 2440 transitions. [2021-08-06 20:36:36,353 INFO L78 Accepts]: Start accepts. Automaton has 1063 states and 2440 transitions. Word has length 28 [2021-08-06 20:36:36,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:36,353 INFO L470 AbstractCegarLoop]: Abstraction has 1063 states and 2440 transitions. [2021-08-06 20:36:36,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:36,353 INFO L276 IsEmpty]: Start isEmpty. Operand 1063 states and 2440 transitions. [2021-08-06 20:36:36,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:36,355 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:36,355 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:36,389 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 20:36:36,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-06 20:36:36,577 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:36,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:36,577 INFO L82 PathProgramCache]: Analyzing trace with hash -62367192, now seen corresponding path program 25 times [2021-08-06 20:36:36,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:36,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079924625] [2021-08-06 20:36:36,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:36,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:36,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:36,642 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:36,643 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:36,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079924625] [2021-08-06 20:36:36,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079924625] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:36,643 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316285588] [2021-08-06 20:36:36,643 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:36:36,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:36,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:36,645 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 20:36:36,646 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 20:36:39,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:39,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:36:39,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:40,035 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:40,035 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [316285588] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:40,035 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:40,035 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-06 20:36:40,035 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768273978] [2021-08-06 20:36:40,036 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:36:40,036 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:40,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:36:40,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:36:40,036 INFO L87 Difference]: Start difference. First operand 1063 states and 2440 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 20:36:40,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:40,372 INFO L93 Difference]: Finished difference Result 1996 states and 4246 transitions. [2021-08-06 20:36:40,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-06 20:36:40,372 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 28 [2021-08-06 20:36:40,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:40,374 INFO L225 Difference]: With dead ends: 1996 [2021-08-06 20:36:40,374 INFO L226 Difference]: Without dead ends: 1984 [2021-08-06 20:36:40,375 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 274.7ms TimeCoverageRelationStatistics Valid=306, Invalid=884, Unknown=0, NotChecked=0, Total=1190 [2021-08-06 20:36:40,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1984 states. [2021-08-06 20:36:40,389 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1984 to 1473. [2021-08-06 20:36:40,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1473 states, 1472 states have (on average 2.338315217391304) internal successors, (3442), 1472 states have internal predecessors, (3442), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:40,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1473 states to 1473 states and 3442 transitions. [2021-08-06 20:36:40,392 INFO L78 Accepts]: Start accepts. Automaton has 1473 states and 3442 transitions. Word has length 28 [2021-08-06 20:36:40,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:40,392 INFO L470 AbstractCegarLoop]: Abstraction has 1473 states and 3442 transitions. [2021-08-06 20:36:40,392 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 20:36:40,392 INFO L276 IsEmpty]: Start isEmpty. Operand 1473 states and 3442 transitions. [2021-08-06 20:36:40,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:40,394 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:40,394 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:40,418 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:40,594 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-06 20:36:40,595 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:40,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:40,595 INFO L82 PathProgramCache]: Analyzing trace with hash -977470808, now seen corresponding path program 39 times [2021-08-06 20:36:40,595 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:40,595 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540414913] [2021-08-06 20:36:40,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:40,595 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:40,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:40,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:40,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540414913] [2021-08-06 20:36:40,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1540414913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:40,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1575848071] [2021-08-06 20:36:40,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:36:40,659 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:40,659 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:40,660 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 20:36:40,661 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 20:36:43,879 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:36:43,879 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:43,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:43,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:44,069 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:44,069 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:44,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:44,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1575848071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:44,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:44,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 20:36:44,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199572479] [2021-08-06 20:36:44,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:36:44,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:44,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:36:44,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:36:44,106 INFO L87 Difference]: Start difference. First operand 1473 states and 3442 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:44,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:44,784 INFO L93 Difference]: Finished difference Result 2070 states and 4426 transitions. [2021-08-06 20:36:44,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-06 20:36:44,785 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:36:44,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:44,787 INFO L225 Difference]: With dead ends: 2070 [2021-08-06 20:36:44,787 INFO L226 Difference]: Without dead ends: 2070 [2021-08-06 20:36:44,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 474.8ms TimeCoverageRelationStatistics Valid=597, Invalid=1565, Unknown=0, NotChecked=0, Total=2162 [2021-08-06 20:36:44,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2070 states. [2021-08-06 20:36:44,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2070 to 1481. [2021-08-06 20:36:44,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1481 states, 1480 states have (on average 2.3324324324324324) internal successors, (3452), 1480 states have internal predecessors, (3452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:44,806 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1481 states to 1481 states and 3452 transitions. [2021-08-06 20:36:44,806 INFO L78 Accepts]: Start accepts. Automaton has 1481 states and 3452 transitions. Word has length 28 [2021-08-06 20:36:44,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:44,806 INFO L470 AbstractCegarLoop]: Abstraction has 1481 states and 3452 transitions. [2021-08-06 20:36:44,806 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:44,806 INFO L276 IsEmpty]: Start isEmpty. Operand 1481 states and 3452 transitions. [2021-08-06 20:36:44,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:44,808 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:44,808 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:44,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:45,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:45,008 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:45,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:45,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1051128680, now seen corresponding path program 40 times [2021-08-06 20:36:45,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:45,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474491129] [2021-08-06 20:36:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:45,009 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:45,084 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:45,085 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:45,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474491129] [2021-08-06 20:36:45,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474491129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:45,085 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914815021] [2021-08-06 20:36:45,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:36:45,085 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:45,085 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:45,101 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 20:36:45,102 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 20:36:48,256 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:36:48,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:48,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:48,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:48,399 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:48,399 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:48,428 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:48,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914815021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:48,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:48,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 20:36:48,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795254641] [2021-08-06 20:36:48,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:36:48,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:48,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:36:48,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:36:48,433 INFO L87 Difference]: Start difference. First operand 1481 states and 3452 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 20:36:48,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:48,657 INFO L93 Difference]: Finished difference Result 2320 states and 5148 transitions. [2021-08-06 20:36:48,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:36:48,657 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 20:36:48,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:48,660 INFO L225 Difference]: With dead ends: 2320 [2021-08-06 20:36:48,660 INFO L226 Difference]: Without dead ends: 2302 [2021-08-06 20:36:48,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 149.0ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:36:48,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2302 states. [2021-08-06 20:36:48,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2302 to 1864. [2021-08-06 20:36:48,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1864 states, 1863 states have (on average 2.3381642512077296) internal successors, (4356), 1863 states have internal predecessors, (4356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:48,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1864 states to 1864 states and 4356 transitions. [2021-08-06 20:36:48,682 INFO L78 Accepts]: Start accepts. Automaton has 1864 states and 4356 transitions. Word has length 28 [2021-08-06 20:36:48,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:48,682 INFO L470 AbstractCegarLoop]: Abstraction has 1864 states and 4356 transitions. [2021-08-06 20:36:48,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 20:36:48,683 INFO L276 IsEmpty]: Start isEmpty. Operand 1864 states and 4356 transitions. [2021-08-06 20:36:48,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:48,685 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:48,685 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:48,708 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 20:36:48,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-06 20:36:48,886 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:48,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:48,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1851096232, now seen corresponding path program 41 times [2021-08-06 20:36:48,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:48,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014178081] [2021-08-06 20:36:48,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:48,886 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:48,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:48,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:36:48,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:48,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014178081] [2021-08-06 20:36:48,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014178081] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:48,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892913700] [2021-08-06 20:36:48,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:36:48,944 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:48,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:48,945 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 20:36:48,955 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 20:36:52,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:36:52,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:52,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:36:52,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:52,273 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:52,273 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:36:52,317 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:36:52,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1892913700] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:52,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:52,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-06 20:36:52,317 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540781] [2021-08-06 20:36:52,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:36:52,317 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:52,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:36:52,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:36:52,317 INFO L87 Difference]: Start difference. First operand 1864 states and 4356 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 20:36:52,433 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:52,433 INFO L93 Difference]: Finished difference Result 2002 states and 4617 transitions. [2021-08-06 20:36:52,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:36:52,433 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 28 [2021-08-06 20:36:52,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:52,436 INFO L225 Difference]: With dead ends: 2002 [2021-08-06 20:36:52,436 INFO L226 Difference]: Without dead ends: 2002 [2021-08-06 20:36:52,436 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 88.4ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:36:52,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2002 states. [2021-08-06 20:36:52,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2002 to 1960. [2021-08-06 20:36:52,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1960 states, 1959 states have (on average 2.3210821847881573) internal successors, (4547), 1959 states have internal predecessors, (4547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:52,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1960 states to 1960 states and 4547 transitions. [2021-08-06 20:36:52,459 INFO L78 Accepts]: Start accepts. Automaton has 1960 states and 4547 transitions. Word has length 28 [2021-08-06 20:36:52,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:52,459 INFO L470 AbstractCegarLoop]: Abstraction has 1960 states and 4547 transitions. [2021-08-06 20:36:52,459 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 20:36:52,459 INFO L276 IsEmpty]: Start isEmpty. Operand 1960 states and 4547 transitions. [2021-08-06 20:36:52,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:52,462 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:52,462 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:52,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Ended with exit code 0 [2021-08-06 20:36:52,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-06 20:36:52,663 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:52,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:52,663 INFO L82 PathProgramCache]: Analyzing trace with hash 127625004, now seen corresponding path program 42 times [2021-08-06 20:36:52,663 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:52,663 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722401652] [2021-08-06 20:36:52,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:52,664 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:52,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:52,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:52,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:52,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722401652] [2021-08-06 20:36:52,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722401652] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:52,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191562881] [2021-08-06 20:36:52,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:36:52,725 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:52,725 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:52,726 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 20:36:52,740 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 20:36:56,012 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:36:56,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:36:56,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:56,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:36:56,160 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:56,161 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:36:56,189 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:36:56,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1191562881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:56,189 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:36:56,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 20:36:56,189 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715226966] [2021-08-06 20:36:56,189 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:36:56,190 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:36:56,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:36:56,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:36:56,190 INFO L87 Difference]: Start difference. First operand 1960 states and 4547 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 20:36:56,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:36:56,405 INFO L93 Difference]: Finished difference Result 2397 states and 5400 transitions. [2021-08-06 20:36:56,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:36:56,406 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 20:36:56,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:36:56,409 INFO L225 Difference]: With dead ends: 2397 [2021-08-06 20:36:56,409 INFO L226 Difference]: Without dead ends: 2391 [2021-08-06 20:36:56,409 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 137.4ms TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:36:56,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2391 states. [2021-08-06 20:36:56,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2391 to 2239. [2021-08-06 20:36:56,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2239 states, 2238 states have (on average 2.331992850759607) internal successors, (5219), 2238 states have internal predecessors, (5219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:36:56,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2239 states to 2239 states and 5219 transitions. [2021-08-06 20:36:56,433 INFO L78 Accepts]: Start accepts. Automaton has 2239 states and 5219 transitions. Word has length 28 [2021-08-06 20:36:56,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:36:56,433 INFO L470 AbstractCegarLoop]: Abstraction has 2239 states and 5219 transitions. [2021-08-06 20:36:56,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 20:36:56,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2239 states and 5219 transitions. [2021-08-06 20:36:56,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:36:56,436 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:36:56,436 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:36:56,463 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-06 20:36:56,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-06 20:36:56,637 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:36:56,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:36:56,637 INFO L82 PathProgramCache]: Analyzing trace with hash -1444759764, now seen corresponding path program 43 times [2021-08-06 20:36:56,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:36:56,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1228707196] [2021-08-06 20:36:56,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:36:56,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:36:56,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:36:56,710 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:36:56,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1228707196] [2021-08-06 20:36:56,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1228707196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:36:56,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678156565] [2021-08-06 20:36:56,711 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:36:56,711 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:36:56,711 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:36:56,712 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 20:36:56,716 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 20:36:59,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:36:59,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:36:59,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:00,052 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:00,052 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:00,089 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:37:00,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678156565] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:00,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:00,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-06 20:37:00,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275961052] [2021-08-06 20:37:00,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:37:00,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:00,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:37:00,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:37:00,090 INFO L87 Difference]: Start difference. First operand 2239 states and 5219 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 20:37:00,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:00,324 INFO L93 Difference]: Finished difference Result 2367 states and 5374 transitions. [2021-08-06 20:37:00,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:37:00,324 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 20:37:00,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:00,327 INFO L225 Difference]: With dead ends: 2367 [2021-08-06 20:37:00,327 INFO L226 Difference]: Without dead ends: 2367 [2021-08-06 20:37:00,327 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 156.6ms TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-08-06 20:37:00,329 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2367 states. [2021-08-06 20:37:00,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2367 to 2183. [2021-08-06 20:37:00,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2183 states, 2182 states have (on average 2.334097158570119) internal successors, (5093), 2182 states have internal predecessors, (5093), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:00,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2183 states to 2183 states and 5093 transitions. [2021-08-06 20:37:00,350 INFO L78 Accepts]: Start accepts. Automaton has 2183 states and 5093 transitions. Word has length 28 [2021-08-06 20:37:00,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:00,350 INFO L470 AbstractCegarLoop]: Abstraction has 2183 states and 5093 transitions. [2021-08-06 20:37:00,350 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 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 20:37:00,350 INFO L276 IsEmpty]: Start isEmpty. Operand 2183 states and 5093 transitions. [2021-08-06 20:37:00,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:00,353 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:00,353 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:00,377 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 20:37:00,553 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-06 20:37:00,554 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:00,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:00,554 INFO L82 PathProgramCache]: Analyzing trace with hash -1802611984, now seen corresponding path program 44 times [2021-08-06 20:37:00,554 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:00,554 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135518945] [2021-08-06 20:37:00,554 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:00,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:00,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:00,623 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:00,624 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:00,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135518945] [2021-08-06 20:37:00,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135518945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:00,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545255594] [2021-08-06 20:37:00,624 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:37:00,624 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:00,624 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:00,625 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 20:37:00,626 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 20:37:03,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:37:03,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:03,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:03,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:04,076 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:04,077 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:04,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:04,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545255594] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:04,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:04,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-06 20:37:04,113 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124548396] [2021-08-06 20:37:04,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:37:04,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:04,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:37:04,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:37:04,113 INFO L87 Difference]: Start difference. First operand 2183 states and 5093 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) 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 20:37:04,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:04,452 INFO L93 Difference]: Finished difference Result 2453 states and 5636 transitions. [2021-08-06 20:37:04,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-06 20:37:04,452 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 20:37:04,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:04,456 INFO L225 Difference]: With dead ends: 2453 [2021-08-06 20:37:04,456 INFO L226 Difference]: Without dead ends: 2453 [2021-08-06 20:37:04,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 204.4ms TimeCoverageRelationStatistics Valid=258, Invalid=612, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:37:04,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2453 states. [2021-08-06 20:37:04,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2453 to 2254. [2021-08-06 20:37:04,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2254 states, 2253 states have (on average 2.32046160674656) internal successors, (5228), 2253 states have internal predecessors, (5228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:04,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2254 states to 2254 states and 5228 transitions. [2021-08-06 20:37:04,484 INFO L78 Accepts]: Start accepts. Automaton has 2254 states and 5228 transitions. Word has length 28 [2021-08-06 20:37:04,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:04,484 INFO L470 AbstractCegarLoop]: Abstraction has 2254 states and 5228 transitions. [2021-08-06 20:37:04,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) 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 20:37:04,484 INFO L276 IsEmpty]: Start isEmpty. Operand 2254 states and 5228 transitions. [2021-08-06 20:37:04,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:04,487 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:04,487 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:04,512 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 20:37:04,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:04,688 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:04,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:04,688 INFO L82 PathProgramCache]: Analyzing trace with hash 317593192, now seen corresponding path program 45 times [2021-08-06 20:37:04,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:04,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782326331] [2021-08-06 20:37:04,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:04,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:04,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:04,752 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:37:04,752 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:04,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782326331] [2021-08-06 20:37:04,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782326331] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:04,753 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550055913] [2021-08-06 20:37:04,753 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:37:04,753 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:04,753 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:04,753 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 20:37:04,754 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 20:37:07,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:37:07,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:07,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:37:07,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:08,194 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:08,194 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:08,216 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:08,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1550055913] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:08,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:08,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 20:37:08,216 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618986684] [2021-08-06 20:37:08,216 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:37:08,216 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:08,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:37:08,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:37:08,217 INFO L87 Difference]: Start difference. First operand 2254 states and 5228 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 20:37:08,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:08,978 INFO L93 Difference]: Finished difference Result 4613 states and 9765 transitions. [2021-08-06 20:37:08,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 20:37:08,978 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 28 [2021-08-06 20:37:08,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:08,984 INFO L225 Difference]: With dead ends: 4613 [2021-08-06 20:37:08,984 INFO L226 Difference]: Without dead ends: 4613 [2021-08-06 20:37:08,984 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 538.8ms TimeCoverageRelationStatistics Valid=723, Invalid=2357, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 20:37:08,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2021-08-06 20:37:09,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 2328. [2021-08-06 20:37:09,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 2.322733132788999) internal successors, (5405), 2327 states have internal predecessors, (5405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:09,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 5405 transitions. [2021-08-06 20:37:09,018 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 5405 transitions. Word has length 28 [2021-08-06 20:37:09,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:09,018 INFO L470 AbstractCegarLoop]: Abstraction has 2328 states and 5405 transitions. [2021-08-06 20:37:09,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 20:37:09,018 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 5405 transitions. [2021-08-06 20:37:09,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:09,021 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:09,021 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:09,045 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 20:37:09,221 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:09,221 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:09,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:09,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1869804056, now seen corresponding path program 26 times [2021-08-06 20:37:09,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:09,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551349396] [2021-08-06 20:37:09,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:09,222 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:09,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:09,287 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:37:09,288 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:09,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551349396] [2021-08-06 20:37:09,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551349396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:09,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [651251376] [2021-08-06 20:37:09,288 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:37:09,288 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:09,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:09,290 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 20:37:09,291 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 20:37:12,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:37:12,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:12,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:37:12,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:12,708 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:12,709 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:12,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:12,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [651251376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:12,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:12,730 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-08-06 20:37:12,730 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072319118] [2021-08-06 20:37:12,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:37:12,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:12,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:37:12,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:37:12,731 INFO L87 Difference]: Start difference. First operand 2328 states and 5405 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:13,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:13,304 INFO L93 Difference]: Finished difference Result 4335 states and 9174 transitions. [2021-08-06 20:37:13,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 20:37:13,304 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:37:13,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:13,310 INFO L225 Difference]: With dead ends: 4335 [2021-08-06 20:37:13,310 INFO L226 Difference]: Without dead ends: 4335 [2021-08-06 20:37:13,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 401.8ms TimeCoverageRelationStatistics Valid=547, Invalid=1523, Unknown=0, NotChecked=0, Total=2070 [2021-08-06 20:37:13,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-08-06 20:37:13,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 2326. [2021-08-06 20:37:13,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2326 states, 2325 states have (on average 2.3221505376344087) internal successors, (5399), 2325 states have internal predecessors, (5399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:13,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2326 states to 2326 states and 5399 transitions. [2021-08-06 20:37:13,345 INFO L78 Accepts]: Start accepts. Automaton has 2326 states and 5399 transitions. Word has length 28 [2021-08-06 20:37:13,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:13,345 INFO L470 AbstractCegarLoop]: Abstraction has 2326 states and 5399 transitions. [2021-08-06 20:37:13,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:13,346 INFO L276 IsEmpty]: Start isEmpty. Operand 2326 states and 5399 transitions. [2021-08-06 20:37:13,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:13,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:13,373 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:13,401 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 20:37:13,582 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:13,582 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:13,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:13,583 INFO L82 PathProgramCache]: Analyzing trace with hash -1106982612, now seen corresponding path program 46 times [2021-08-06 20:37:13,583 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:13,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126598866] [2021-08-06 20:37:13,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:13,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:13,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:13,644 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:37:13,644 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:13,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126598866] [2021-08-06 20:37:13,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126598866] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:13,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459061460] [2021-08-06 20:37:13,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:37:13,645 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:13,645 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:13,646 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 20:37:13,681 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 20:37:16,902 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:37:16,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:16,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:16,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:17,076 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:17,077 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:17,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:17,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459061460] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:17,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:17,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 20:37:17,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522641922] [2021-08-06 20:37:17,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:37:17,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:17,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:37:17,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:37:17,116 INFO L87 Difference]: Start difference. First operand 2326 states and 5399 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:17,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:17,452 INFO L93 Difference]: Finished difference Result 3041 states and 6706 transitions. [2021-08-06 20:37:17,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-06 20:37:17,453 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:37:17,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:17,456 INFO L225 Difference]: With dead ends: 3041 [2021-08-06 20:37:17,456 INFO L226 Difference]: Without dead ends: 3033 [2021-08-06 20:37:17,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 218.1ms TimeCoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:37:17,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3033 states. [2021-08-06 20:37:17,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3033 to 2643. [2021-08-06 20:37:17,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2643 states, 2642 states have (on average 2.329674489023467) internal successors, (6155), 2642 states have internal predecessors, (6155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:17,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2643 states to 2643 states and 6155 transitions. [2021-08-06 20:37:17,485 INFO L78 Accepts]: Start accepts. Automaton has 2643 states and 6155 transitions. Word has length 28 [2021-08-06 20:37:17,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:17,485 INFO L470 AbstractCegarLoop]: Abstraction has 2643 states and 6155 transitions. [2021-08-06 20:37:17,486 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:17,486 INFO L276 IsEmpty]: Start isEmpty. Operand 2643 states and 6155 transitions. [2021-08-06 20:37:17,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:17,489 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:17,489 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:17,513 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:17,689 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-08-06 20:37:17,689 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:17,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:17,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1084447976, now seen corresponding path program 27 times [2021-08-06 20:37:17,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:17,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503769299] [2021-08-06 20:37:17,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:17,690 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:17,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:17,787 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:37:17,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:17,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503769299] [2021-08-06 20:37:17,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503769299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:17,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980496049] [2021-08-06 20:37:17,787 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:37:17,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:17,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:17,788 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 20:37:17,791 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 20:37:21,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:37:21,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:21,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:37:21,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:21,262 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980496049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:21,262 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:21,262 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-06 20:37:21,263 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [568319344] [2021-08-06 20:37:21,263 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:37:21,263 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:21,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:37:21,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:37:21,263 INFO L87 Difference]: Start difference. First operand 2643 states and 6155 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 20:37:21,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:21,551 INFO L93 Difference]: Finished difference Result 3141 states and 7028 transitions. [2021-08-06 20:37:21,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:37:21,551 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 28 [2021-08-06 20:37:21,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:21,555 INFO L225 Difference]: With dead ends: 3141 [2021-08-06 20:37:21,555 INFO L226 Difference]: Without dead ends: 3135 [2021-08-06 20:37:21,555 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 265.4ms TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:37:21,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3135 states. [2021-08-06 20:37:21,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3135 to 2578. [2021-08-06 20:37:21,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2578 states, 2577 states have (on average 2.3279006596818004) internal successors, (5999), 2577 states have internal predecessors, (5999), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:21,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2578 states to 2578 states and 5999 transitions. [2021-08-06 20:37:21,583 INFO L78 Accepts]: Start accepts. Automaton has 2578 states and 5999 transitions. Word has length 28 [2021-08-06 20:37:21,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:21,584 INFO L470 AbstractCegarLoop]: Abstraction has 2578 states and 5999 transitions. [2021-08-06 20:37:21,584 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 20:37:21,584 INFO L276 IsEmpty]: Start isEmpty. Operand 2578 states and 5999 transitions. [2021-08-06 20:37:21,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:21,587 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:21,587 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:21,612 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:21,787 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:21,787 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:21,787 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:21,788 INFO L82 PathProgramCache]: Analyzing trace with hash 169344360, now seen corresponding path program 47 times [2021-08-06 20:37:21,788 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:21,788 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271841313] [2021-08-06 20:37:21,788 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:21,788 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:21,854 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:37:21,854 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:21,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271841313] [2021-08-06 20:37:21,854 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271841313] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:21,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417677185] [2021-08-06 20:37:21,854 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:37:21,854 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:21,854 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:21,855 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 20:37:21,856 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 20:37:25,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:37:25,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:25,167 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:25,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:25,343 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:25,344 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:25,379 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:25,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417677185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:25,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:25,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-06 20:37:25,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513096231] [2021-08-06 20:37:25,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:37:25,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:25,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:37:25,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:37:25,380 INFO L87 Difference]: Start difference. First operand 2578 states and 5999 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:25,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:25,710 INFO L93 Difference]: Finished difference Result 2903 states and 6443 transitions. [2021-08-06 20:37:25,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:37:25,711 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:37:25,711 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:25,714 INFO L225 Difference]: With dead ends: 2903 [2021-08-06 20:37:25,714 INFO L226 Difference]: Without dead ends: 2897 [2021-08-06 20:37:25,714 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 223.2ms TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2021-08-06 20:37:25,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2897 states. [2021-08-06 20:37:25,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2897 to 2554. [2021-08-06 20:37:25,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2554 states, 2553 states have (on average 2.3262828045436743) internal successors, (5939), 2553 states have internal predecessors, (5939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:25,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2554 states to 2554 states and 5939 transitions. [2021-08-06 20:37:25,756 INFO L78 Accepts]: Start accepts. Automaton has 2554 states and 5939 transitions. Word has length 28 [2021-08-06 20:37:25,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:25,756 INFO L470 AbstractCegarLoop]: Abstraction has 2554 states and 5939 transitions. [2021-08-06 20:37:25,756 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:25,756 INFO L276 IsEmpty]: Start isEmpty. Operand 2554 states and 5939 transitions. [2021-08-06 20:37:25,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:25,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:25,759 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:25,783 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:25,959 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:25,960 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:25,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:25,960 INFO L82 PathProgramCache]: Analyzing trace with hash 565783912, now seen corresponding path program 48 times [2021-08-06 20:37:25,960 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:25,960 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612158000] [2021-08-06 20:37:25,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:25,960 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:25,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:26,015 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:26,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:26,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612158000] [2021-08-06 20:37:26,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612158000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:26,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615313650] [2021-08-06 20:37:26,015 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:37:26,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:26,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:26,016 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 20:37:26,017 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 20:37:29,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:37:29,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:29,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:29,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:29,515 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:29,516 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:29,550 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:29,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615313650] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:29,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:29,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-06 20:37:29,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990796062] [2021-08-06 20:37:29,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:37:29,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:29,551 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:37:29,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:37:29,551 INFO L87 Difference]: Start difference. First operand 2554 states and 5939 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 20:37:30,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:30,074 INFO L93 Difference]: Finished difference Result 3142 states and 6980 transitions. [2021-08-06 20:37:30,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 20:37:30,074 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-08-06 20:37:30,074 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:30,078 INFO L225 Difference]: With dead ends: 3142 [2021-08-06 20:37:30,078 INFO L226 Difference]: Without dead ends: 3142 [2021-08-06 20:37:30,078 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 354.1ms TimeCoverageRelationStatistics Valid=455, Invalid=1351, Unknown=0, NotChecked=0, Total=1806 [2021-08-06 20:37:30,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3142 states. [2021-08-06 20:37:30,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3142 to 2526. [2021-08-06 20:37:30,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2526 states, 2525 states have (on average 2.3318811881188117) internal successors, (5888), 2525 states have internal predecessors, (5888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:30,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2526 states to 2526 states and 5888 transitions. [2021-08-06 20:37:30,107 INFO L78 Accepts]: Start accepts. Automaton has 2526 states and 5888 transitions. Word has length 28 [2021-08-06 20:37:30,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:30,107 INFO L470 AbstractCegarLoop]: Abstraction has 2526 states and 5888 transitions. [2021-08-06 20:37:30,107 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 20:37:30,107 INFO L276 IsEmpty]: Start isEmpty. Operand 2526 states and 5888 transitions. [2021-08-06 20:37:30,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:30,110 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:30,110 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:30,135 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 20:37:30,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-06 20:37:30,310 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:30,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:30,311 INFO L82 PathProgramCache]: Analyzing trace with hash 287086380, now seen corresponding path program 49 times [2021-08-06 20:37:30,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:30,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [71884213] [2021-08-06 20:37:30,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:30,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:30,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:30,389 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:30,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:30,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [71884213] [2021-08-06 20:37:30,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [71884213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:30,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [132138748] [2021-08-06 20:37:30,389 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:37:30,390 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:30,390 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:30,390 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 20:37:30,391 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 20:37:33,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:33,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:33,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:33,872 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:33,872 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:33,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:33,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [132138748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:33,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:33,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:37:33,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043668687] [2021-08-06 20:37:33,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:37:33,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:33,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:37:33,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:37:33,911 INFO L87 Difference]: Start difference. First operand 2526 states and 5888 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 20:37:34,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:34,421 INFO L93 Difference]: Finished difference Result 3326 states and 7406 transitions. [2021-08-06 20:37:34,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 20:37:34,422 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 28 [2021-08-06 20:37:34,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:34,426 INFO L225 Difference]: With dead ends: 3326 [2021-08-06 20:37:34,426 INFO L226 Difference]: Without dead ends: 3326 [2021-08-06 20:37:34,426 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 344.8ms TimeCoverageRelationStatistics Valid=467, Invalid=1255, Unknown=0, NotChecked=0, Total=1722 [2021-08-06 20:37:34,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3326 states. [2021-08-06 20:37:34,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3326 to 2866. [2021-08-06 20:37:34,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2866 states, 2865 states have (on average 2.344851657940663) internal successors, (6718), 2865 states have internal predecessors, (6718), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:34,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2866 states to 2866 states and 6718 transitions. [2021-08-06 20:37:34,460 INFO L78 Accepts]: Start accepts. Automaton has 2866 states and 6718 transitions. Word has length 28 [2021-08-06 20:37:34,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:34,460 INFO L470 AbstractCegarLoop]: Abstraction has 2866 states and 6718 transitions. [2021-08-06 20:37:34,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 20:37:34,460 INFO L276 IsEmpty]: Start isEmpty. Operand 2866 states and 6718 transitions. [2021-08-06 20:37:34,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:34,463 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:34,463 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:34,488 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 20:37:34,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-06 20:37:34,665 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:34,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:34,665 INFO L82 PathProgramCache]: Analyzing trace with hash -70765840, now seen corresponding path program 50 times [2021-08-06 20:37:34,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:34,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753437864] [2021-08-06 20:37:34,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:34,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:34,678 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:34,754 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:34,754 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:34,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753437864] [2021-08-06 20:37:34,755 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [753437864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:34,755 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684782651] [2021-08-06 20:37:34,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:37:34,755 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:34,755 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:34,756 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 20:37:34,757 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 20:37:38,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:37:38,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:38,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:38,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:38,264 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:38,264 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:38,300 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:38,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684782651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:38,300 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:38,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:37:38,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809070869] [2021-08-06 20:37:38,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:37:38,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:38,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:37:38,301 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:37:38,301 INFO L87 Difference]: Start difference. First operand 2866 states and 6718 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 20:37:38,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:38,814 INFO L93 Difference]: Finished difference Result 3982 states and 8910 transitions. [2021-08-06 20:37:38,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 20:37:38,814 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 28 [2021-08-06 20:37:38,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:38,819 INFO L225 Difference]: With dead ends: 3982 [2021-08-06 20:37:38,819 INFO L226 Difference]: Without dead ends: 3982 [2021-08-06 20:37:38,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 362.1ms TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:37:38,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3982 states. [2021-08-06 20:37:38,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3982 to 3108. [2021-08-06 20:37:38,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3108 states, 3107 states have (on average 2.332796910202768) internal successors, (7248), 3107 states have internal predecessors, (7248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:38,863 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3108 states to 3108 states and 7248 transitions. [2021-08-06 20:37:38,863 INFO L78 Accepts]: Start accepts. Automaton has 3108 states and 7248 transitions. Word has length 28 [2021-08-06 20:37:38,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:38,863 INFO L470 AbstractCegarLoop]: Abstraction has 3108 states and 7248 transitions. [2021-08-06 20:37:38,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 20:37:38,863 INFO L276 IsEmpty]: Start isEmpty. Operand 3108 states and 7248 transitions. [2021-08-06 20:37:38,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:38,867 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:38,867 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:38,891 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 20:37:39,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:39,067 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:39,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:39,068 INFO L82 PathProgramCache]: Analyzing trace with hash 1294751916, now seen corresponding path program 28 times [2021-08-06 20:37:39,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:39,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336063995] [2021-08-06 20:37:39,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:39,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:39,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:39,133 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:39,133 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:39,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336063995] [2021-08-06 20:37:39,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336063995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:39,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1918747799] [2021-08-06 20:37:39,134 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:37:39,134 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:39,134 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:39,134 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 20:37:39,135 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 20:37:42,479 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:37:42,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:42,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:37:42,480 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:42,705 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:42,705 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:42,727 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:42,727 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1918747799] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:42,727 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:42,727 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 20:37:42,727 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327627144] [2021-08-06 20:37:42,728 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:37:42,728 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:42,728 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:37:42,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:37:42,728 INFO L87 Difference]: Start difference. First operand 3108 states and 7248 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 20:37:43,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:43,756 INFO L93 Difference]: Finished difference Result 10663 states and 22016 transitions. [2021-08-06 20:37:43,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-06 20:37:43,757 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 28 [2021-08-06 20:37:43,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:43,777 INFO L225 Difference]: With dead ends: 10663 [2021-08-06 20:37:43,777 INFO L226 Difference]: Without dead ends: 10663 [2021-08-06 20:37:43,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 777.2ms TimeCoverageRelationStatistics Valid=1259, Invalid=4291, Unknown=0, NotChecked=0, Total=5550 [2021-08-06 20:37:43,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10663 states. [2021-08-06 20:37:43,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10663 to 4330. [2021-08-06 20:37:43,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4330 states, 4329 states have (on average 2.371217371217371) internal successors, (10265), 4329 states have internal predecessors, (10265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:43,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4330 states to 4330 states and 10265 transitions. [2021-08-06 20:37:43,915 INFO L78 Accepts]: Start accepts. Automaton has 4330 states and 10265 transitions. Word has length 28 [2021-08-06 20:37:43,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:43,915 INFO L470 AbstractCegarLoop]: Abstraction has 4330 states and 10265 transitions. [2021-08-06 20:37:43,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 20:37:43,915 INFO L276 IsEmpty]: Start isEmpty. Operand 4330 states and 10265 transitions. [2021-08-06 20:37:43,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:43,920 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:43,920 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:43,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:44,121 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:44,121 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:44,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:44,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1476783376, now seen corresponding path program 51 times [2021-08-06 20:37:44,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:44,122 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1426008595] [2021-08-06 20:37:44,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:44,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:44,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:44,211 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:44,211 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:44,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1426008595] [2021-08-06 20:37:44,211 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1426008595] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:44,211 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678503160] [2021-08-06 20:37:44,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:37:44,211 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:44,211 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:44,212 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 20:37:44,213 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 20:37:47,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:37:47,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:47,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:47,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:47,737 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:47,738 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:37:47,773 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:47,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678503160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:47,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:47,773 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-06 20:37:47,773 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875927572] [2021-08-06 20:37:47,773 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:37:47,773 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:47,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:37:47,774 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:37:47,774 INFO L87 Difference]: Start difference. First operand 4330 states and 10265 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) 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 20:37:48,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:48,367 INFO L93 Difference]: Finished difference Result 5654 states and 12929 transitions. [2021-08-06 20:37:48,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 20:37:48,367 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) 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 20:37:48,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:48,374 INFO L225 Difference]: With dead ends: 5654 [2021-08-06 20:37:48,374 INFO L226 Difference]: Without dead ends: 5654 [2021-08-06 20:37:48,374 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 425.2ms TimeCoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 20:37:48,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5654 states. [2021-08-06 20:37:48,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5654 to 4560. [2021-08-06 20:37:48,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4560 states, 4559 states have (on average 2.348980039482343) internal successors, (10709), 4559 states have internal predecessors, (10709), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:48,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4560 states to 4560 states and 10709 transitions. [2021-08-06 20:37:48,430 INFO L78 Accepts]: Start accepts. Automaton has 4560 states and 10709 transitions. Word has length 28 [2021-08-06 20:37:48,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:48,430 INFO L470 AbstractCegarLoop]: Abstraction has 4560 states and 10709 transitions. [2021-08-06 20:37:48,430 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) 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 20:37:48,431 INFO L276 IsEmpty]: Start isEmpty. Operand 4560 states and 10709 transitions. [2021-08-06 20:37:48,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:48,435 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:48,435 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:48,460 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 20:37:48,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-08-06 20:37:48,636 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:48,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:48,636 INFO L82 PathProgramCache]: Analyzing trace with hash 1329988516, now seen corresponding path program 52 times [2021-08-06 20:37:48,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:48,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8982039] [2021-08-06 20:37:48,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:48,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:48,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:48,720 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:48,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:48,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8982039] [2021-08-06 20:37:48,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8982039] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:48,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873479677] [2021-08-06 20:37:48,720 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:37:48,720 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:48,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:48,721 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 20:37:48,723 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 20:37:52,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:37:52,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:52,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:52,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:52,272 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:52,273 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:52,301 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:52,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873479677] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:52,301 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:52,301 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-06 20:37:52,301 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365194831] [2021-08-06 20:37:52,301 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:37:52,301 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:52,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:37:52,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:37:52,302 INFO L87 Difference]: Start difference. First operand 4560 states and 10709 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 20:37:52,654 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:52,654 INFO L93 Difference]: Finished difference Result 5041 states and 11550 transitions. [2021-08-06 20:37:52,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-06 20:37:52,654 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 28 [2021-08-06 20:37:52,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:52,660 INFO L225 Difference]: With dead ends: 5041 [2021-08-06 20:37:52,660 INFO L226 Difference]: Without dead ends: 5037 [2021-08-06 20:37:52,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 235.1ms TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:37:52,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5037 states. [2021-08-06 20:37:52,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5037 to 4557. [2021-08-06 20:37:52,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4557 states, 4556 states have (on average 2.3483318700614575) internal successors, (10699), 4556 states have internal predecessors, (10699), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:52,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4557 states to 4557 states and 10699 transitions. [2021-08-06 20:37:52,742 INFO L78 Accepts]: Start accepts. Automaton has 4557 states and 10699 transitions. Word has length 28 [2021-08-06 20:37:52,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:52,742 INFO L470 AbstractCegarLoop]: Abstraction has 4557 states and 10699 transitions. [2021-08-06 20:37:52,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 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 20:37:52,742 INFO L276 IsEmpty]: Start isEmpty. Operand 4557 states and 10699 transitions. [2021-08-06 20:37:52,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:52,748 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:52,748 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:52,778 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 20:37:52,968 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:52,969 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:52,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:52,969 INFO L82 PathProgramCache]: Analyzing trace with hash 1051290984, now seen corresponding path program 53 times [2021-08-06 20:37:52,969 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:52,969 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012852668] [2021-08-06 20:37:52,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:52,970 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:53,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:53,055 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:53,055 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:53,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012852668] [2021-08-06 20:37:53,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012852668] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:53,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477072796] [2021-08-06 20:37:53,055 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:37:53,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:53,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:53,062 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 20:37:53,062 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 20:37:56,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:37:56,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:37:56,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:37:56,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:37:56,624 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:56,625 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:37:56,656 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:56,656 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477072796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:56,656 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:37:56,656 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-06 20:37:56,656 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358302227] [2021-08-06 20:37:56,656 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:37:56,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:37:56,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:37:56,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:37:56,657 INFO L87 Difference]: Start difference. First operand 4557 states and 10699 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 20:37:57,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:37:57,014 INFO L93 Difference]: Finished difference Result 4777 states and 10993 transitions. [2021-08-06 20:37:57,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-06 20:37:57,014 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 28 [2021-08-06 20:37:57,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:37:57,020 INFO L225 Difference]: With dead ends: 4777 [2021-08-06 20:37:57,020 INFO L226 Difference]: Without dead ends: 4773 [2021-08-06 20:37:57,021 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 228.1ms TimeCoverageRelationStatistics Valid=248, Invalid=744, Unknown=0, NotChecked=0, Total=992 [2021-08-06 20:37:57,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4773 states. [2021-08-06 20:37:57,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4773 to 4039. [2021-08-06 20:37:57,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4039 states, 4038 states have (on average 2.3580980683506687) internal successors, (9522), 4038 states have internal predecessors, (9522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:37:57,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4039 states to 4039 states and 9522 transitions. [2021-08-06 20:37:57,068 INFO L78 Accepts]: Start accepts. Automaton has 4039 states and 9522 transitions. Word has length 28 [2021-08-06 20:37:57,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:37:57,069 INFO L470 AbstractCegarLoop]: Abstraction has 4039 states and 9522 transitions. [2021-08-06 20:37:57,069 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 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 20:37:57,069 INFO L276 IsEmpty]: Start isEmpty. Operand 4039 states and 9522 transitions. [2021-08-06 20:37:57,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:37:57,073 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:37:57,073 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:37:57,098 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-06 20:37:57,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:57,273 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:37:57,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:37:57,274 INFO L82 PathProgramCache]: Analyzing trace with hash -741118356, now seen corresponding path program 54 times [2021-08-06 20:37:57,274 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:37:57,274 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522260103] [2021-08-06 20:37:57,274 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:37:57,274 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:37:57,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:37:57,374 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:37:57,374 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:37:57,374 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522260103] [2021-08-06 20:37:57,374 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522260103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:37:57,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496493881] [2021-08-06 20:37:57,375 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:37:57,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:37:57,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:37:57,376 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 20:37:57,377 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 20:38:00,835 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:38:00,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:00,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:38:00,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:01,034 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:01,035 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:01,056 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:38:01,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496493881] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:01,057 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:01,057 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-06 20:38:01,057 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1624671287] [2021-08-06 20:38:01,057 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-06 20:38:01,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:01,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-06 20:38:01,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-06 20:38:01,057 INFO L87 Difference]: Start difference. First operand 4039 states and 9522 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 20:38:01,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:01,482 INFO L93 Difference]: Finished difference Result 7199 states and 15416 transitions. [2021-08-06 20:38:01,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-06 20:38:01,482 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 28 [2021-08-06 20:38:01,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:01,504 INFO L225 Difference]: With dead ends: 7199 [2021-08-06 20:38:01,504 INFO L226 Difference]: Without dead ends: 7199 [2021-08-06 20:38:01,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 307.8ms TimeCoverageRelationStatistics Valid=390, Invalid=1250, Unknown=0, NotChecked=0, Total=1640 [2021-08-06 20:38:01,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7199 states. [2021-08-06 20:38:01,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7199 to 4318. [2021-08-06 20:38:01,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4318 states, 4317 states have (on average 2.368311327310632) internal successors, (10224), 4317 states have internal predecessors, (10224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:01,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4318 states to 4318 states and 10224 transitions. [2021-08-06 20:38:01,564 INFO L78 Accepts]: Start accepts. Automaton has 4318 states and 10224 transitions. Word has length 28 [2021-08-06 20:38:01,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:01,564 INFO L470 AbstractCegarLoop]: Abstraction has 4318 states and 10224 transitions. [2021-08-06 20:38:01,565 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 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 20:38:01,565 INFO L276 IsEmpty]: Start isEmpty. Operand 4318 states and 10224 transitions. [2021-08-06 20:38:01,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:01,569 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:01,569 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:01,595 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:01,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-08-06 20:38:01,770 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:01,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:01,770 INFO L82 PathProgramCache]: Analyzing trace with hash 2062354028, now seen corresponding path program 55 times [2021-08-06 20:38:01,770 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:01,770 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1701571728] [2021-08-06 20:38:01,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:01,771 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:01,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:01,861 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:01,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:01,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1701571728] [2021-08-06 20:38:01,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1701571728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:01,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383855220] [2021-08-06 20:38:01,861 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:38:01,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:01,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:01,862 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 20:38:01,862 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 20:38:05,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:05,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:38:05,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:05,531 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:05,532 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:05,553 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:38:05,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383855220] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:05,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:05,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-06 20:38:05,554 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481160555] [2021-08-06 20:38:05,554 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:38:05,554 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:05,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:38:05,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:38:05,554 INFO L87 Difference]: Start difference. First operand 4318 states and 10224 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 20:38:06,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:06,257 INFO L93 Difference]: Finished difference Result 7609 states and 16159 transitions. [2021-08-06 20:38:06,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-06 20:38:06,257 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 28 [2021-08-06 20:38:06,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:06,267 INFO L225 Difference]: With dead ends: 7609 [2021-08-06 20:38:06,267 INFO L226 Difference]: Without dead ends: 7609 [2021-08-06 20:38:06,267 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 516.3ms TimeCoverageRelationStatistics Valid=750, Invalid=2672, Unknown=0, NotChecked=0, Total=3422 [2021-08-06 20:38:06,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7609 states. [2021-08-06 20:38:06,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7609 to 4215. [2021-08-06 20:38:06,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4215 states, 4214 states have (on average 2.3514475557664927) internal successors, (9909), 4214 states have internal predecessors, (9909), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:06,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4215 states to 4215 states and 9909 transitions. [2021-08-06 20:38:06,334 INFO L78 Accepts]: Start accepts. Automaton has 4215 states and 9909 transitions. Word has length 28 [2021-08-06 20:38:06,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:06,335 INFO L470 AbstractCegarLoop]: Abstraction has 4215 states and 9909 transitions. [2021-08-06 20:38:06,335 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 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 20:38:06,335 INFO L276 IsEmpty]: Start isEmpty. Operand 4215 states and 9909 transitions. [2021-08-06 20:38:06,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:06,339 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:06,339 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:06,364 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:06,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:06,540 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:06,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:06,540 INFO L82 PathProgramCache]: Analyzing trace with hash -47923992, now seen corresponding path program 56 times [2021-08-06 20:38:06,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:06,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158881646] [2021-08-06 20:38:06,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:06,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:06,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:06,595 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:38:06,595 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:06,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158881646] [2021-08-06 20:38:06,595 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158881646] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:06,595 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1288914255] [2021-08-06 20:38:06,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:38:06,595 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:06,596 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:06,597 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 20:38:06,598 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 20:38:10,115 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:38:10,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:10,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:38:10,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:10,264 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:38:10,265 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:38:10,311 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:38:10,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1288914255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:10,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:10,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-06 20:38:10,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523262270] [2021-08-06 20:38:10,311 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:38:10,311 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:10,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:38:10,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:38:10,312 INFO L87 Difference]: Start difference. First operand 4215 states and 9909 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 20:38:10,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:10,407 INFO L93 Difference]: Finished difference Result 5495 states and 12583 transitions. [2021-08-06 20:38:10,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:38:10,408 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 28 [2021-08-06 20:38:10,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:10,415 INFO L225 Difference]: With dead ends: 5495 [2021-08-06 20:38:10,415 INFO L226 Difference]: Without dead ends: 5493 [2021-08-06 20:38:10,415 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 69.0ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:38:10,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5493 states. [2021-08-06 20:38:10,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5493 to 4317. [2021-08-06 20:38:10,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4317 states, 4316 states have (on average 2.3540315106580167) internal successors, (10160), 4316 states have internal predecessors, (10160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:10,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4317 states to 4317 states and 10160 transitions. [2021-08-06 20:38:10,486 INFO L78 Accepts]: Start accepts. Automaton has 4317 states and 10160 transitions. Word has length 28 [2021-08-06 20:38:10,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:10,487 INFO L470 AbstractCegarLoop]: Abstraction has 4317 states and 10160 transitions. [2021-08-06 20:38:10,487 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 20:38:10,487 INFO L276 IsEmpty]: Start isEmpty. Operand 4317 states and 10160 transitions. [2021-08-06 20:38:10,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:10,493 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:10,494 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:10,526 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 20:38:10,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:10,721 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:10,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:10,721 INFO L82 PathProgramCache]: Analyzing trace with hash -1897671576, now seen corresponding path program 57 times [2021-08-06 20:38:10,721 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:10,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899098441] [2021-08-06 20:38:10,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:10,721 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:10,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:10,813 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:10,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:10,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899098441] [2021-08-06 20:38:10,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899098441] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:10,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21727963] [2021-08-06 20:38:10,813 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:38:10,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:10,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:10,815 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 20:38:10,816 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 20:38:14,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:38:14,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:14,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:38:14,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:14,455 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:38:14,456 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:38:14,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:14,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21727963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:14,485 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:14,485 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-08-06 20:38:14,485 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926733685] [2021-08-06 20:38:14,485 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:38:14,485 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:14,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:38:14,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:38:14,485 INFO L87 Difference]: Start difference. First operand 4317 states and 10160 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:14,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:14,646 INFO L93 Difference]: Finished difference Result 6114 states and 13958 transitions. [2021-08-06 20:38:14,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:38:14,647 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:38:14,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:14,654 INFO L225 Difference]: With dead ends: 6114 [2021-08-06 20:38:14,655 INFO L226 Difference]: Without dead ends: 6102 [2021-08-06 20:38:14,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 89.2ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-08-06 20:38:14,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6102 states. [2021-08-06 20:38:14,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6102 to 5658. [2021-08-06 20:38:14,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5658 states, 5657 states have (on average 2.3355135230687645) internal successors, (13212), 5657 states have internal predecessors, (13212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:14,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5658 states to 5658 states and 13212 transitions. [2021-08-06 20:38:14,775 INFO L78 Accepts]: Start accepts. Automaton has 5658 states and 13212 transitions. Word has length 28 [2021-08-06 20:38:14,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:14,775 INFO L470 AbstractCegarLoop]: Abstraction has 5658 states and 13212 transitions. [2021-08-06 20:38:14,776 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:14,776 INFO L276 IsEmpty]: Start isEmpty. Operand 5658 states and 13212 transitions. [2021-08-06 20:38:14,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:14,781 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:14,781 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:14,806 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 20:38:14,981 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-06 20:38:14,982 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:14,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:14,982 INFO L82 PathProgramCache]: Analyzing trace with hash -843950872, now seen corresponding path program 58 times [2021-08-06 20:38:14,982 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:14,982 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712302858] [2021-08-06 20:38:14,982 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:14,982 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:14,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:15,036 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:38:15,037 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:15,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712302858] [2021-08-06 20:38:15,037 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712302858] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:15,037 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2142367719] [2021-08-06 20:38:15,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:38:15,037 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:15,037 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:15,038 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 20:38:15,038 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 20:38:18,475 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:38:18,475 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:18,476 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:38:18,476 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:18,616 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:18,617 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:18,658 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-06 20:38:18,658 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2142367719] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:18,658 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:18,658 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-06 20:38:18,658 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072943669] [2021-08-06 20:38:18,659 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:38:18,659 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:18,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:38:18,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:38:18,659 INFO L87 Difference]: Start difference. First operand 5658 states and 13212 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 20:38:18,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:18,770 INFO L93 Difference]: Finished difference Result 6726 states and 15361 transitions. [2021-08-06 20:38:18,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:38:18,770 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 28 [2021-08-06 20:38:18,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:18,779 INFO L225 Difference]: With dead ends: 6726 [2021-08-06 20:38:18,780 INFO L226 Difference]: Without dead ends: 6726 [2021-08-06 20:38:18,780 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 83.2ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:38:18,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6726 states. [2021-08-06 20:38:18,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6726 to 5466. [2021-08-06 20:38:18,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5466 states, 5465 states have (on average 2.3218664226898444) internal successors, (12689), 5465 states have internal predecessors, (12689), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:18,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5466 states to 5466 states and 12689 transitions. [2021-08-06 20:38:18,858 INFO L78 Accepts]: Start accepts. Automaton has 5466 states and 12689 transitions. Word has length 28 [2021-08-06 20:38:18,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:18,858 INFO L470 AbstractCegarLoop]: Abstraction has 5466 states and 12689 transitions. [2021-08-06 20:38:18,859 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 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 20:38:18,859 INFO L276 IsEmpty]: Start isEmpty. Operand 5466 states and 12689 transitions. [2021-08-06 20:38:18,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:18,864 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:18,864 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:18,891 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-06 20:38:19,064 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:19,065 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:19,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:19,065 INFO L82 PathProgramCache]: Analyzing trace with hash 1591637096, now seen corresponding path program 59 times [2021-08-06 20:38:19,065 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:19,065 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436256263] [2021-08-06 20:38:19,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:19,065 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:19,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:19,145 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:19,145 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:19,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436256263] [2021-08-06 20:38:19,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436256263] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:19,145 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1123115126] [2021-08-06 20:38:19,145 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:38:19,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:19,146 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:19,146 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 20:38:19,147 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 20:38:22,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:38:22,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:22,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:38:22,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:22,705 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:22,705 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:22,741 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:22,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1123115126] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:22,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:22,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-06 20:38:22,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349924580] [2021-08-06 20:38:22,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:38:22,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:22,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:38:22,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:38:22,741 INFO L87 Difference]: Start difference. First operand 5466 states and 12689 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:22,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:22,898 INFO L93 Difference]: Finished difference Result 5653 states and 12886 transitions. [2021-08-06 20:38:22,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:38:22,898 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:38:22,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:22,905 INFO L225 Difference]: With dead ends: 5653 [2021-08-06 20:38:22,905 INFO L226 Difference]: Without dead ends: 5653 [2021-08-06 20:38:22,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 102.4ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:38:22,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5653 states. [2021-08-06 20:38:22,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5653 to 5276. [2021-08-06 20:38:22,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5276 states, 5275 states have (on average 2.3133649289099525) internal successors, (12203), 5275 states have internal predecessors, (12203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:22,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5276 states to 5276 states and 12203 transitions. [2021-08-06 20:38:22,976 INFO L78 Accepts]: Start accepts. Automaton has 5276 states and 12203 transitions. Word has length 28 [2021-08-06 20:38:22,976 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:22,976 INFO L470 AbstractCegarLoop]: Abstraction has 5276 states and 12203 transitions. [2021-08-06 20:38:22,976 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:22,976 INFO L276 IsEmpty]: Start isEmpty. Operand 5276 states and 12203 transitions. [2021-08-06 20:38:22,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:22,983 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:22,983 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:23,019 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:23,208 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:23,209 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:23,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:23,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1097704024, now seen corresponding path program 60 times [2021-08-06 20:38:23,209 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:23,209 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958136781] [2021-08-06 20:38:23,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:23,209 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:23,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:23,264 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:38:23,264 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:23,264 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958136781] [2021-08-06 20:38:23,264 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958136781] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:23,265 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559508833] [2021-08-06 20:38:23,265 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:38:23,265 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:23,265 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:23,265 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 20:38:23,266 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 20:38:26,725 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:38:26,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:26,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:38:26,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:26,851 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:26,852 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:26,894 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-06 20:38:26,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559508833] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:26,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:26,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-06 20:38:26,894 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386708822] [2021-08-06 20:38:26,894 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:38:26,894 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:26,894 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:38:26,895 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:38:26,895 INFO L87 Difference]: Start difference. First operand 5276 states and 12203 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 20:38:26,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:26,994 INFO L93 Difference]: Finished difference Result 5484 states and 12634 transitions. [2021-08-06 20:38:26,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-06 20:38:26,994 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 28 [2021-08-06 20:38:26,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:27,035 INFO L225 Difference]: With dead ends: 5484 [2021-08-06 20:38:27,035 INFO L226 Difference]: Without dead ends: 5484 [2021-08-06 20:38:27,036 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 82.3ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:38:27,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5484 states. [2021-08-06 20:38:27,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5484 to 5249. [2021-08-06 20:38:27,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5249 states, 5248 states have (on average 2.3123094512195124) internal successors, (12135), 5248 states have internal predecessors, (12135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:27,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5249 states to 5249 states and 12135 transitions. [2021-08-06 20:38:27,094 INFO L78 Accepts]: Start accepts. Automaton has 5249 states and 12135 transitions. Word has length 28 [2021-08-06 20:38:27,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:27,094 INFO L470 AbstractCegarLoop]: Abstraction has 5249 states and 12135 transitions. [2021-08-06 20:38:27,094 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 20:38:27,094 INFO L276 IsEmpty]: Start isEmpty. Operand 5249 states and 12135 transitions. [2021-08-06 20:38:27,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:27,100 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:27,100 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:27,125 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:27,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:27,300 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:27,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:27,301 INFO L82 PathProgramCache]: Analyzing trace with hash 177438376, now seen corresponding path program 61 times [2021-08-06 20:38:27,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:27,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894677465] [2021-08-06 20:38:27,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:27,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:27,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:27,361 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:38:27,361 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:27,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894677465] [2021-08-06 20:38:27,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894677465] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:27,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459752447] [2021-08-06 20:38:27,361 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:38:27,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:27,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:27,362 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 20:38:27,362 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 20:38:30,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:30,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-06 20:38:30,849 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:30,970 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:30,971 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:31,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:38:31,014 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459752447] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:31,014 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:31,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-06 20:38:31,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687736070] [2021-08-06 20:38:31,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-06 20:38:31,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:31,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-06 20:38:31,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-06 20:38:31,014 INFO L87 Difference]: Start difference. First operand 5249 states and 12135 transitions. Second operand has 10 states, 10 states have (on average 3.6) 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 20:38:31,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:31,148 INFO L93 Difference]: Finished difference Result 5788 states and 13261 transitions. [2021-08-06 20:38:31,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-06 20:38:31,149 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) 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 20:38:31,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:31,156 INFO L225 Difference]: With dead ends: 5788 [2021-08-06 20:38:31,157 INFO L226 Difference]: Without dead ends: 5788 [2021-08-06 20:38:31,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 92.6ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:38:31,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5788 states. [2021-08-06 20:38:31,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5788 to 5475. [2021-08-06 20:38:31,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5475 states, 5474 states have (on average 2.303799780781878) internal successors, (12611), 5474 states have internal predecessors, (12611), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:31,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5475 states to 5475 states and 12611 transitions. [2021-08-06 20:38:31,227 INFO L78 Accepts]: Start accepts. Automaton has 5475 states and 12611 transitions. Word has length 28 [2021-08-06 20:38:31,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:31,227 INFO L470 AbstractCegarLoop]: Abstraction has 5475 states and 12611 transitions. [2021-08-06 20:38:31,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) 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 20:38:31,227 INFO L276 IsEmpty]: Start isEmpty. Operand 5475 states and 12611 transitions. [2021-08-06 20:38:31,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:31,235 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:31,235 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:31,281 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 20:38:31,448 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-08-06 20:38:31,449 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:31,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:31,449 INFO L82 PathProgramCache]: Analyzing trace with hash 1705304104, now seen corresponding path program 62 times [2021-08-06 20:38:31,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:31,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265507985] [2021-08-06 20:38:31,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:31,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:31,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:31,512 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:31,512 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:31,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265507985] [2021-08-06 20:38:31,512 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265507985] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:31,512 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1073123717] [2021-08-06 20:38:31,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:38:31,512 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:31,513 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:31,514 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 20:38:31,515 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 20:38:35,003 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:38:35,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:35,003 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-06 20:38:35,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:35,227 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:35,228 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:35,249 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:35,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1073123717] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:35,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:35,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-06 20:38:35,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020818282] [2021-08-06 20:38:35,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-06 20:38:35,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:35,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-06 20:38:35,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-06 20:38:35,251 INFO L87 Difference]: Start difference. First operand 5475 states and 12611 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 20:38:35,880 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:35,880 INFO L93 Difference]: Finished difference Result 13393 states and 28197 transitions. [2021-08-06 20:38:35,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-06 20:38:35,880 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 28 [2021-08-06 20:38:35,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:35,900 INFO L225 Difference]: With dead ends: 13393 [2021-08-06 20:38:35,900 INFO L226 Difference]: Without dead ends: 13393 [2021-08-06 20:38:35,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 426.0ms TimeCoverageRelationStatistics Valid=638, Invalid=1912, Unknown=0, NotChecked=0, Total=2550 [2021-08-06 20:38:35,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13393 states. [2021-08-06 20:38:36,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13393 to 7539. [2021-08-06 20:38:36,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7539 states, 7538 states have (on average 2.3256832050941894) internal successors, (17531), 7538 states have internal predecessors, (17531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:36,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7539 states to 7539 states and 17531 transitions. [2021-08-06 20:38:36,047 INFO L78 Accepts]: Start accepts. Automaton has 7539 states and 17531 transitions. Word has length 28 [2021-08-06 20:38:36,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:36,047 INFO L470 AbstractCegarLoop]: Abstraction has 7539 states and 17531 transitions. [2021-08-06 20:38:36,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 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 20:38:36,047 INFO L276 IsEmpty]: Start isEmpty. Operand 7539 states and 17531 transitions. [2021-08-06 20:38:36,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:36,056 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:36,056 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:36,080 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 20:38:36,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:36,257 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:36,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:36,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1963126568, now seen corresponding path program 63 times [2021-08-06 20:38:36,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:36,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961020963] [2021-08-06 20:38:36,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:36,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:36,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:36,336 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:36,336 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:36,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961020963] [2021-08-06 20:38:36,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961020963] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:36,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944132910] [2021-08-06 20:38:36,337 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:38:36,337 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:36,337 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:36,338 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 20:38:36,339 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 20:38:39,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:38:39,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:39,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:38:39,855 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:39,984 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:38:39,985 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:38:40,013 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:40,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944132910] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:40,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:40,014 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-06 20:38:40,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102935942] [2021-08-06 20:38:40,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:38:40,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:40,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:38:40,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:38:40,014 INFO L87 Difference]: Start difference. First operand 7539 states and 17531 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:40,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:40,173 INFO L93 Difference]: Finished difference Result 9040 states and 20755 transitions. [2021-08-06 20:38:40,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-06 20:38:40,174 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:38:40,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:40,186 INFO L225 Difference]: With dead ends: 9040 [2021-08-06 20:38:40,186 INFO L226 Difference]: Without dead ends: 9036 [2021-08-06 20:38:40,186 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 87.6ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-06 20:38:40,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9036 states. [2021-08-06 20:38:40,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9036 to 8904. [2021-08-06 20:38:40,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8904 states, 8903 states have (on average 2.315286981916208) internal successors, (20613), 8903 states have internal predecessors, (20613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:40,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8904 states to 8904 states and 20613 transitions. [2021-08-06 20:38:40,298 INFO L78 Accepts]: Start accepts. Automaton has 8904 states and 20613 transitions. Word has length 28 [2021-08-06 20:38:40,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:40,298 INFO L470 AbstractCegarLoop]: Abstraction has 8904 states and 20613 transitions. [2021-08-06 20:38:40,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:40,298 INFO L276 IsEmpty]: Start isEmpty. Operand 8904 states and 20613 transitions. [2021-08-06 20:38:40,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:40,308 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:40,308 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:40,333 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:40,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:40,508 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:40,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:40,509 INFO L82 PathProgramCache]: Analyzing trace with hash 390741800, now seen corresponding path program 64 times [2021-08-06 20:38:40,509 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:40,509 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142902747] [2021-08-06 20:38:40,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:40,509 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:40,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:40,638 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:40,638 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:40,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142902747] [2021-08-06 20:38:40,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [142902747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:40,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405192091] [2021-08-06 20:38:40,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:38:40,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:40,639 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:40,640 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 20:38:40,641 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 20:38:44,085 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:38:44,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:44,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:38:44,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:44,251 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:44,252 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:44,286 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:44,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405192091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:44,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:44,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-06 20:38:44,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872175346] [2021-08-06 20:38:44,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:38:44,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:44,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:38:44,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:38:44,287 INFO L87 Difference]: Start difference. First operand 8904 states and 20613 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:44,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:44,490 INFO L93 Difference]: Finished difference Result 9057 states and 20800 transitions. [2021-08-06 20:38:44,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:38:44,490 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:38:44,490 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:44,503 INFO L225 Difference]: With dead ends: 9057 [2021-08-06 20:38:44,504 INFO L226 Difference]: Without dead ends: 9057 [2021-08-06 20:38:44,504 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 122.0ms TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-08-06 20:38:44,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9057 states. [2021-08-06 20:38:44,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9057 to 8841. [2021-08-06 20:38:44,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8841 states, 8840 states have (on average 2.3134615384615387) internal successors, (20451), 8840 states have internal predecessors, (20451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:44,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8841 states to 8841 states and 20451 transitions. [2021-08-06 20:38:44,623 INFO L78 Accepts]: Start accepts. Automaton has 8841 states and 20451 transitions. Word has length 28 [2021-08-06 20:38:44,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:44,623 INFO L470 AbstractCegarLoop]: Abstraction has 8841 states and 20451 transitions. [2021-08-06 20:38:44,623 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:44,623 INFO L276 IsEmpty]: Start isEmpty. Operand 8841 states and 20451 transitions. [2021-08-06 20:38:44,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:44,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:44,633 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:44,658 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 20:38:44,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:44,833 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:44,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:44,834 INFO L82 PathProgramCache]: Analyzing trace with hash 32889580, now seen corresponding path program 65 times [2021-08-06 20:38:44,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:44,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062777045] [2021-08-06 20:38:44,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:44,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:44,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:44,901 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:38:44,902 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:44,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062777045] [2021-08-06 20:38:44,902 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2062777045] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:44,902 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [894396831] [2021-08-06 20:38:44,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:38:44,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:44,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:44,903 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 20:38:44,903 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 20:38:48,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:38:48,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:48,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:38:48,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:48,581 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:48,582 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:48,616 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-06 20:38:48,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [894396831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:48,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:48,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-06 20:38:48,617 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932456734] [2021-08-06 20:38:48,617 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-06 20:38:48,617 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:48,617 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-06 20:38:48,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-06 20:38:48,617 INFO L87 Difference]: Start difference. First operand 8841 states and 20451 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:48,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:48,819 INFO L93 Difference]: Finished difference Result 9073 states and 20909 transitions. [2021-08-06 20:38:48,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-06 20:38:48,819 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-06 20:38:48,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:48,831 INFO L225 Difference]: With dead ends: 9073 [2021-08-06 20:38:48,831 INFO L226 Difference]: Without dead ends: 9073 [2021-08-06 20:38:48,832 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 141.5ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:38:48,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9073 states. [2021-08-06 20:38:48,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9073 to 8975. [2021-08-06 20:38:48,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8975 states, 8974 states have (on average 2.3114553153554716) internal successors, (20743), 8974 states have internal predecessors, (20743), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:48,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8975 states to 8975 states and 20743 transitions. [2021-08-06 20:38:48,945 INFO L78 Accepts]: Start accepts. Automaton has 8975 states and 20743 transitions. Word has length 28 [2021-08-06 20:38:48,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:48,945 INFO L470 AbstractCegarLoop]: Abstraction has 8975 states and 20743 transitions. [2021-08-06 20:38:48,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:48,945 INFO L276 IsEmpty]: Start isEmpty. Operand 8975 states and 20743 transitions. [2021-08-06 20:38:48,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:48,955 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:48,955 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:48,981 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 20:38:49,156 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:49,156 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:49,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:49,156 INFO L82 PathProgramCache]: Analyzing trace with hash 832715244, now seen corresponding path program 66 times [2021-08-06 20:38:49,156 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:49,157 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345083326] [2021-08-06 20:38:49,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:49,157 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:49,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:49,229 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:49,229 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:49,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345083326] [2021-08-06 20:38:49,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1345083326] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:49,230 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683039895] [2021-08-06 20:38:49,230 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:38:49,230 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:49,230 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:49,231 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 20:38:49,231 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 20:38:52,797 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-06 20:38:52,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:38:52,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:38:52,798 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:52,918 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:52,919 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:38:52,954 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:52,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683039895] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:52,955 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:52,955 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-08-06 20:38:52,955 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146219635] [2021-08-06 20:38:52,955 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-06 20:38:52,955 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:52,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-06 20:38:52,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-06 20:38:52,955 INFO L87 Difference]: Start difference. First operand 8975 states and 20743 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 20:38:53,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:53,236 INFO L93 Difference]: Finished difference Result 9345 states and 21527 transitions. [2021-08-06 20:38:53,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-06 20:38:53,237 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 20:38:53,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:53,249 INFO L225 Difference]: With dead ends: 9345 [2021-08-06 20:38:53,249 INFO L226 Difference]: Without dead ends: 9345 [2021-08-06 20:38:53,250 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 184.9ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-08-06 20:38:53,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9345 states. [2021-08-06 20:38:53,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9345 to 9048. [2021-08-06 20:38:53,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9048 states, 9047 states have (on average 2.310931800596883) internal successors, (20907), 9047 states have internal predecessors, (20907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:53,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9048 states to 9048 states and 20907 transitions. [2021-08-06 20:38:53,367 INFO L78 Accepts]: Start accepts. Automaton has 9048 states and 20907 transitions. Word has length 28 [2021-08-06 20:38:53,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:53,367 INFO L470 AbstractCegarLoop]: Abstraction has 9048 states and 20907 transitions. [2021-08-06 20:38:53,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 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 20:38:53,367 INFO L276 IsEmpty]: Start isEmpty. Operand 9048 states and 20907 transitions. [2021-08-06 20:38:53,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:53,377 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:53,377 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:53,402 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-06 20:38:53,577 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-06 20:38:53,577 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:53,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:53,578 INFO L82 PathProgramCache]: Analyzing trace with hash -180039896, now seen corresponding path program 67 times [2021-08-06 20:38:53,578 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:53,578 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405733587] [2021-08-06 20:38:53,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:53,578 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:53,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:53,659 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:53,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:53,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405733587] [2021-08-06 20:38:53,660 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [405733587] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:53,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [568999887] [2021-08-06 20:38:53,660 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:38:53,660 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:53,660 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:53,661 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 20:38:53,661 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 20:38:57,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:57,215 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:38:57,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:38:57,357 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:38:57,358 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 14.3 percent of original size [2021-08-06 20:38:57,387 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:57,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [568999887] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:57,387 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:38:57,387 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-06 20:38:57,387 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718018336] [2021-08-06 20:38:57,387 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:38:57,387 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:38:57,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:38:57,388 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:38:57,388 INFO L87 Difference]: Start difference. First operand 9048 states and 20907 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:38:57,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:38:57,546 INFO L93 Difference]: Finished difference Result 10107 states and 22987 transitions. [2021-08-06 20:38:57,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-06 20:38:57,547 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:38:57,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:38:57,561 INFO L225 Difference]: With dead ends: 10107 [2021-08-06 20:38:57,561 INFO L226 Difference]: Without dead ends: 10103 [2021-08-06 20:38:57,561 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 99.1ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-08-06 20:38:57,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10103 states. [2021-08-06 20:38:57,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10103 to 9893. [2021-08-06 20:38:57,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9893 states, 9892 states have (on average 2.3013546300040435) internal successors, (22765), 9892 states have internal predecessors, (22765), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:38:57,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9893 states to 9893 states and 22765 transitions. [2021-08-06 20:38:57,734 INFO L78 Accepts]: Start accepts. Automaton has 9893 states and 22765 transitions. Word has length 28 [2021-08-06 20:38:57,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:38:57,734 INFO L470 AbstractCegarLoop]: Abstraction has 9893 states and 22765 transitions. [2021-08-06 20:38:57,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:38:57,734 INFO L276 IsEmpty]: Start isEmpty. Operand 9893 states and 22765 transitions. [2021-08-06 20:38:57,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:38:57,744 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:38:57,744 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:38:57,769 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 20:38:57,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-08-06 20:38:57,944 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:38:57,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:38:57,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1752424664, now seen corresponding path program 68 times [2021-08-06 20:38:57,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:38:57,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296036992] [2021-08-06 20:38:57,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:38:57,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:38:57,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:38:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:38:58,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:38:58,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296036992] [2021-08-06 20:38:58,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296036992] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:38:58,019 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830308787] [2021-08-06 20:38:58,019 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:38:58,019 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:38:58,019 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:38:58,020 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 20:38:58,021 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 20:39:01,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:39:01,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:39:01,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:39:01,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:01,737 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:39:01,737 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:39:01,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:01,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830308787] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:01,775 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:01,775 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-06 20:39:01,775 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659906998] [2021-08-06 20:39:01,775 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:39:01,775 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:01,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:39:01,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:39:01,775 INFO L87 Difference]: Start difference. First operand 9893 states and 22765 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:39:02,053 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:02,053 INFO L93 Difference]: Finished difference Result 10140 states and 23074 transitions. [2021-08-06 20:39:02,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-06 20:39:02,054 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:39:02,054 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:02,068 INFO L225 Difference]: With dead ends: 10140 [2021-08-06 20:39:02,068 INFO L226 Difference]: Without dead ends: 10140 [2021-08-06 20:39:02,068 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 160.7ms TimeCoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2021-08-06 20:39:02,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10140 states. [2021-08-06 20:39:02,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10140 to 8586. [2021-08-06 20:39:02,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8586 states, 8585 states have (on average 2.3099592312172392) internal successors, (19831), 8585 states have internal predecessors, (19831), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:02,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8586 states to 8586 states and 19831 transitions. [2021-08-06 20:39:02,182 INFO L78 Accepts]: Start accepts. Automaton has 8586 states and 19831 transitions. Word has length 28 [2021-08-06 20:39:02,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:02,183 INFO L470 AbstractCegarLoop]: Abstraction has 8586 states and 19831 transitions. [2021-08-06 20:39:02,183 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:39:02,183 INFO L276 IsEmpty]: Start isEmpty. Operand 8586 states and 19831 transitions. [2021-08-06 20:39:02,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:39:02,191 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:02,192 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:39:02,217 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 20:39:02,392 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:02,392 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:02,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:02,392 INFO L82 PathProgramCache]: Analyzing trace with hash -2110276884, now seen corresponding path program 69 times [2021-08-06 20:39:02,392 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:02,393 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770847464] [2021-08-06 20:39:02,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:02,393 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:02,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:02,468 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:02,468 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:02,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770847464] [2021-08-06 20:39:02,468 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770847464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:02,468 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778242213] [2021-08-06 20:39:02,468 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:39:02,468 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:02,468 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:02,469 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 20:39:02,469 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 20:39:06,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-06 20:39:06,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:39:06,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:39:06,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:06,170 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:39:06,171 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:39:06,206 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:06,206 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1778242213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:06,206 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:06,206 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-06 20:39:06,206 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1182414401] [2021-08-06 20:39:06,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:39:06,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:06,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:39:06,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:39:06,207 INFO L87 Difference]: Start difference. First operand 8586 states and 19831 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:39:06,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:06,489 INFO L93 Difference]: Finished difference Result 8822 states and 20295 transitions. [2021-08-06 20:39:06,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-06 20:39:06,489 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:39:06,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:06,500 INFO L225 Difference]: With dead ends: 8822 [2021-08-06 20:39:06,501 INFO L226 Difference]: Without dead ends: 8822 [2021-08-06 20:39:06,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 202.4ms TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2021-08-06 20:39:06,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8822 states. [2021-08-06 20:39:06,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8822 to 8720. [2021-08-06 20:39:06,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8720 states, 8719 states have (on average 2.307948159192568) internal successors, (20123), 8719 states have internal predecessors, (20123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:06,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8720 states to 8720 states and 20123 transitions. [2021-08-06 20:39:06,608 INFO L78 Accepts]: Start accepts. Automaton has 8720 states and 20123 transitions. Word has length 28 [2021-08-06 20:39:06,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:06,608 INFO L470 AbstractCegarLoop]: Abstraction has 8720 states and 20123 transitions. [2021-08-06 20:39:06,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:39:06,608 INFO L276 IsEmpty]: Start isEmpty. Operand 8720 states and 20123 transitions. [2021-08-06 20:39:06,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:39:06,617 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:06,617 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:39:06,643 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-06 20:39:06,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:06,817 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:06,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:06,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1310451220, now seen corresponding path program 70 times [2021-08-06 20:39:06,818 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:06,818 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27741202] [2021-08-06 20:39:06,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:06,818 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:06,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:06,906 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:06,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:06,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27741202] [2021-08-06 20:39:06,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27741202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:06,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393369683] [2021-08-06 20:39:06,907 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:39:06,907 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:06,907 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:06,908 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 20:39:06,937 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 20:39:10,603 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:39:10,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:39:10,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:39:10,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:10,738 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:39:10,739 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:39:10,774 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:10,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1393369683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:10,774 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:10,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-06 20:39:10,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217513867] [2021-08-06 20:39:10,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-06 20:39:10,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:10,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-06 20:39:10,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-06 20:39:10,775 INFO L87 Difference]: Start difference. First operand 8720 states and 20123 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:39:10,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:10,994 INFO L93 Difference]: Finished difference Result 8895 states and 20481 transitions. [2021-08-06 20:39:10,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:39:10,995 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:39:10,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:11,008 INFO L225 Difference]: With dead ends: 8895 [2021-08-06 20:39:11,008 INFO L226 Difference]: Without dead ends: 8895 [2021-08-06 20:39:11,008 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 145.2ms TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:39:11,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8895 states. [2021-08-06 20:39:11,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8895 to 8710. [2021-08-06 20:39:11,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8710 states, 8709 states have (on average 2.308301756803307) internal successors, (20103), 8709 states have internal predecessors, (20103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:11,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8710 states to 8710 states and 20103 transitions. [2021-08-06 20:39:11,127 INFO L78 Accepts]: Start accepts. Automaton has 8710 states and 20103 transitions. Word has length 28 [2021-08-06 20:39:11,127 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:11,127 INFO L470 AbstractCegarLoop]: Abstraction has 8710 states and 20103 transitions. [2021-08-06 20:39:11,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 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 20:39:11,127 INFO L276 IsEmpty]: Start isEmpty. Operand 8710 states and 20103 transitions. [2021-08-06 20:39:11,136 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-06 20:39:11,136 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:11,136 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:39:11,161 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-06 20:39:11,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-06 20:39:11,337 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:11,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:11,337 INFO L82 PathProgramCache]: Analyzing trace with hash 421394924, now seen corresponding path program 71 times [2021-08-06 20:39:11,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:11,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1317037299] [2021-08-06 20:39:11,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:11,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:11,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:11,465 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:11,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:11,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1317037299] [2021-08-06 20:39:11,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1317037299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:11,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684397430] [2021-08-06 20:39:11,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:39:11,465 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:11,465 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:11,466 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 20:39:11,466 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 20:39:15,001 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-06 20:39:15,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:39:15,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-06 20:39:15,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:15,197 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:39:15,198 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 11.1 percent of original size [2021-08-06 20:39:15,234 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:15,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684397430] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:15,234 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:15,234 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-06 20:39:15,234 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193114974] [2021-08-06 20:39:15,234 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-06 20:39:15,234 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:15,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-06 20:39:15,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-06 20:39:15,235 INFO L87 Difference]: Start difference. First operand 8710 states and 20103 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 20:39:15,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:15,466 INFO L93 Difference]: Finished difference Result 8927 states and 20538 transitions. [2021-08-06 20:39:15,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-06 20:39:15,466 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 28 [2021-08-06 20:39:15,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:15,478 INFO L225 Difference]: With dead ends: 8927 [2021-08-06 20:39:15,478 INFO L226 Difference]: Without dead ends: 8927 [2021-08-06 20:39:15,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 200.8ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:39:15,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8927 states. [2021-08-06 20:39:15,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8927 to 8703. [2021-08-06 20:39:15,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8703 states, 8702 states have (on average 2.3078602620087336) internal successors, (20083), 8702 states have internal predecessors, (20083), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:15,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8703 states to 8703 states and 20083 transitions. [2021-08-06 20:39:15,589 INFO L78 Accepts]: Start accepts. Automaton has 8703 states and 20083 transitions. Word has length 28 [2021-08-06 20:39:15,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:15,589 INFO L470 AbstractCegarLoop]: Abstraction has 8703 states and 20083 transitions. [2021-08-06 20:39:15,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 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 20:39:15,589 INFO L276 IsEmpty]: Start isEmpty. Operand 8703 states and 20083 transitions. [2021-08-06 20:39:15,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:39:15,598 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:15,598 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:39:15,624 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 20:39:15,799 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:15,799 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:15,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:15,799 INFO L82 PathProgramCache]: Analyzing trace with hash 330778506, now seen corresponding path program 72 times [2021-08-06 20:39:15,799 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:15,800 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813750679] [2021-08-06 20:39:15,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:15,800 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:15,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:15,966 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 29, result has 78.4 percent of original size [2021-08-06 20:39:15,976 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 29, result has 78.4 percent of original size [2021-08-06 20:39:16,060 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 91.9 percent of original size [2021-08-06 20:39:16,115 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 91.9 percent of original size [2021-08-06 20:39:16,300 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 36, result has 90.1 percent of original size [2021-08-06 20:39:16,339 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 36, result has 90.1 percent of original size [2021-08-06 20:39:16,535 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 88.4 percent of original size [2021-08-06 20:39:16,570 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 88.4 percent of original size [2021-08-06 20:39:16,746 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 30, result has 82.6 percent of original size [2021-08-06 20:39:16,759 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 30, result has 82.6 percent of original size [2021-08-06 20:39:16,842 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 30, result has 82.2 percent of original size [2021-08-06 20:39:16,854 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 30, result has 82.2 percent of original size [2021-08-06 20:39:16,931 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 78, result has 25.7 percent of original size [2021-08-06 20:39:16,933 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 78, result has 25.7 percent of original size [2021-08-06 20:39:16,971 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:16,971 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:16,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813750679] [2021-08-06 20:39:16,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813750679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:16,971 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596050860] [2021-08-06 20:39:16,971 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:39:16,971 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:16,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:16,972 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 20:39:16,973 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 20:39:20,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:39:20,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:39:20,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 31 conjunts are in the unsatisfiable core [2021-08-06 20:39:20,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:39:45,088 INFO L354 Elim1Store]: treesize reduction 66, result has 9.6 percent of original size [2021-08-06 20:39:45,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 242 treesize of output 162 [2021-08-06 20:39:45,370 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:39:45,371 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:39:45,376 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:45,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596050860] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:45,376 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:39:45,376 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:39:45,376 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [776902017] [2021-08-06 20:39:45,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:39:45,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:39:45,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:39:45,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:39:45,381 INFO L87 Difference]: Start difference. First operand 8703 states and 20083 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:49,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:39:49,799 INFO L93 Difference]: Finished difference Result 9268 states and 21048 transitions. [2021-08-06 20:39:49,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-06 20:39:49,800 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:39:49,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:39:49,814 INFO L225 Difference]: With dead ends: 9268 [2021-08-06 20:39:49,814 INFO L226 Difference]: Without dead ends: 9238 [2021-08-06 20:39:49,814 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 502 ImplicationChecksByTransitivity, 4446.7ms TimeCoverageRelationStatistics Valid=349, Invalid=1543, Unknown=0, NotChecked=0, Total=1892 [2021-08-06 20:39:49,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9238 states. [2021-08-06 20:39:49,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9238 to 8760. [2021-08-06 20:39:49,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8760 states, 8759 states have (on average 2.308596871789017) internal successors, (20221), 8759 states have internal predecessors, (20221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:49,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8760 states to 8760 states and 20221 transitions. [2021-08-06 20:39:49,928 INFO L78 Accepts]: Start accepts. Automaton has 8760 states and 20221 transitions. Word has length 30 [2021-08-06 20:39:49,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:39:49,928 INFO L470 AbstractCegarLoop]: Abstraction has 8760 states and 20221 transitions. [2021-08-06 20:39:49,929 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:39:49,929 INFO L276 IsEmpty]: Start isEmpty. Operand 8760 states and 20221 transitions. [2021-08-06 20:39:49,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:39:49,938 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:39:49,938 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:39:49,966 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 20:39:50,139 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-06 20:39:50,139 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:39:50,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:39:50,139 INFO L82 PathProgramCache]: Analyzing trace with hash 584567630, now seen corresponding path program 73 times [2021-08-06 20:39:50,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:39:50,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058569725] [2021-08-06 20:39:50,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:39:50,140 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:39:50,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:50,255 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 79.8 percent of original size [2021-08-06 20:39:50,264 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 79.8 percent of original size [2021-08-06 20:39:50,327 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 72, result has 70.9 percent of original size [2021-08-06 20:39:50,351 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 72, result has 70.9 percent of original size [2021-08-06 20:39:50,474 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 90.8 percent of original size [2021-08-06 20:39:50,497 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 90.8 percent of original size [2021-08-06 20:39:50,705 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 88.6 percent of original size [2021-08-06 20:39:50,725 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 88.6 percent of original size [2021-08-06 20:39:50,850 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 90.8 percent of original size [2021-08-06 20:39:50,860 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 90.8 percent of original size [2021-08-06 20:39:50,918 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 90.6 percent of original size [2021-08-06 20:39:50,927 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 90.6 percent of original size [2021-08-06 20:39:50,982 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 102, result has 25.0 percent of original size [2021-08-06 20:39:50,985 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 102, result has 25.0 percent of original size [2021-08-06 20:39:51,023 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:39:51,023 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:39:51,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058569725] [2021-08-06 20:39:51,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1058569725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:39:51,023 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [105866528] [2021-08-06 20:39:51,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:39:51,023 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:39:51,023 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:39:51,024 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 20:39:51,024 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 20:39:54,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:39:54,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:39:54,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:40:01,275 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:40:01,276 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 154 [2021-08-06 20:40:01,528 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:40:01,531 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:40:01,671 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:40:01,672 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:40:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:01,677 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [105866528] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:01,677 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:40:01,678 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:40:01,678 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796444338] [2021-08-06 20:40:01,678 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:40:01,678 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:40:01,678 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:40:01,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:40:01,678 INFO L87 Difference]: Start difference. First operand 8760 states and 20221 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:05,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:40:05,402 INFO L93 Difference]: Finished difference Result 9294 states and 21100 transitions. [2021-08-06 20:40:05,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-06 20:40:05,403 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:40:05,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:40:05,416 INFO L225 Difference]: With dead ends: 9294 [2021-08-06 20:40:05,416 INFO L226 Difference]: Without dead ends: 9269 [2021-08-06 20:40:05,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 815 ImplicationChecksByTransitivity, 3711.1ms TimeCoverageRelationStatistics Valid=484, Invalid=2272, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 20:40:05,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9269 states. [2021-08-06 20:40:05,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9269 to 8766. [2021-08-06 20:40:05,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8766 states, 8765 states have (on average 2.3086138049058755) internal successors, (20235), 8765 states have internal predecessors, (20235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:05,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8766 states to 8766 states and 20235 transitions. [2021-08-06 20:40:05,527 INFO L78 Accepts]: Start accepts. Automaton has 8766 states and 20235 transitions. Word has length 30 [2021-08-06 20:40:05,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:40:05,527 INFO L470 AbstractCegarLoop]: Abstraction has 8766 states and 20235 transitions. [2021-08-06 20:40:05,527 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:05,527 INFO L276 IsEmpty]: Start isEmpty. Operand 8766 states and 20235 transitions. [2021-08-06 20:40:05,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:40:05,537 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:40:05,537 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:40:05,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-06 20:40:05,738 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-06 20:40:05,738 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:40:05,738 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:40:05,738 INFO L82 PathProgramCache]: Analyzing trace with hash -1518969078, now seen corresponding path program 74 times [2021-08-06 20:40:05,738 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:40:05,738 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131793125] [2021-08-06 20:40:05,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:40:05,738 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:40:05,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:40:05,871 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 288, result has 19.3 percent of original size [2021-08-06 20:40:05,886 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 288, result has 19.3 percent of original size [2021-08-06 20:40:05,936 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 160, result has 46.1 percent of original size [2021-08-06 20:40:06,028 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 160, result has 46.1 percent of original size [2021-08-06 20:40:06,149 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 160, result has 47.0 percent of original size [2021-08-06 20:40:06,176 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 160, result has 47.0 percent of original size [2021-08-06 20:40:06,312 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 162, result has 60.1 percent of original size [2021-08-06 20:40:06,354 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 162, result has 60.1 percent of original size [2021-08-06 20:40:06,508 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 141, result has 61.0 percent of original size [2021-08-06 20:40:06,536 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 141, result has 61.0 percent of original size [2021-08-06 20:40:06,630 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 85, result has 70.7 percent of original size [2021-08-06 20:40:06,654 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 85, result has 70.7 percent of original size [2021-08-06 20:40:06,781 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:06,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:40:06,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131793125] [2021-08-06 20:40:06,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1131793125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:06,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664621702] [2021-08-06 20:40:06,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:40:06,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:40:06,781 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:40:06,793 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 20:40:06,794 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 20:40:10,770 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:40:10,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:40:10,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:40:10,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:40:13,359 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 20:40:13,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 246 treesize of output 154 [2021-08-06 20:40:13,625 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:40:13,626 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:40:13,631 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:13,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664621702] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:13,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:40:13,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 20:40:13,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26826789] [2021-08-06 20:40:13,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:40:13,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:40:13,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:40:13,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=398, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:40:13,632 INFO L87 Difference]: Start difference. First operand 8766 states and 20235 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:17,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:40:17,975 INFO L93 Difference]: Finished difference Result 8892 states and 20427 transitions. [2021-08-06 20:40:17,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-06 20:40:17,975 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:40:17,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:40:17,987 INFO L225 Difference]: With dead ends: 8892 [2021-08-06 20:40:17,988 INFO L226 Difference]: Without dead ends: 8882 [2021-08-06 20:40:17,988 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 556 ImplicationChecksByTransitivity, 4625.4ms TimeCoverageRelationStatistics Valid=312, Invalid=1944, Unknown=0, NotChecked=0, Total=2256 [2021-08-06 20:40:17,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8882 states. [2021-08-06 20:40:18,078 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8882 to 8786. [2021-08-06 20:40:18,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8786 states, 8785 states have (on average 2.3091633466135457) internal successors, (20286), 8785 states have internal predecessors, (20286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:18,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8786 states to 8786 states and 20286 transitions. [2021-08-06 20:40:18,100 INFO L78 Accepts]: Start accepts. Automaton has 8786 states and 20286 transitions. Word has length 30 [2021-08-06 20:40:18,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:40:18,100 INFO L470 AbstractCegarLoop]: Abstraction has 8786 states and 20286 transitions. [2021-08-06 20:40:18,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:18,100 INFO L276 IsEmpty]: Start isEmpty. Operand 8786 states and 20286 transitions. [2021-08-06 20:40:18,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:40:18,109 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:40:18,110 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:40:18,137 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-06 20:40:18,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-08-06 20:40:18,310 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:40:18,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:40:18,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1860894602, now seen corresponding path program 75 times [2021-08-06 20:40:18,310 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:40:18,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26675861] [2021-08-06 20:40:18,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:40:18,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:40:18,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:40:18,472 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 23, result has 79.8 percent of original size [2021-08-06 20:40:18,481 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 23, result has 79.8 percent of original size [2021-08-06 20:40:18,541 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 72, result has 70.9 percent of original size [2021-08-06 20:40:18,564 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 72, result has 70.9 percent of original size [2021-08-06 20:40:18,697 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 90.8 percent of original size [2021-08-06 20:40:18,727 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 90.8 percent of original size [2021-08-06 20:40:18,903 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 88.6 percent of original size [2021-08-06 20:40:18,926 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 88.6 percent of original size [2021-08-06 20:40:19,055 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 90.8 percent of original size [2021-08-06 20:40:19,064 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 90.8 percent of original size [2021-08-06 20:40:19,123 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 102, result has 26.6 percent of original size [2021-08-06 20:40:19,126 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 102, result has 26.6 percent of original size [2021-08-06 20:40:19,155 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 102, result has 25.0 percent of original size [2021-08-06 20:40:19,158 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 102, result has 25.0 percent of original size [2021-08-06 20:40:19,195 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:19,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:40:19,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26675861] [2021-08-06 20:40:19,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26675861] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:19,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [205349185] [2021-08-06 20:40:19,195 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:40:19,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:40:19,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:40:19,196 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 20:40:19,197 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 20:40:23,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:40:23,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:40:23,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:40:23,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:40:27,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:40:27,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 246 treesize of output 200 [2021-08-06 20:40:32,092 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 86, result has 22.5 percent of original size [2021-08-06 20:40:32,096 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 86, result has 22.5 percent of original size [2021-08-06 20:40:32,210 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:40:32,211 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:40:32,216 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:32,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [205349185] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:32,216 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:40:32,216 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-06 20:40:32,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1614464641] [2021-08-06 20:40:32,217 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:40:32,217 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:40:32,217 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:40:32,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:40:32,217 INFO L87 Difference]: Start difference. First operand 8786 states and 20286 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:37,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:40:37,962 INFO L93 Difference]: Finished difference Result 9270 states and 21092 transitions. [2021-08-06 20:40:37,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-06 20:40:37,962 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:40:37,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:40:37,974 INFO L225 Difference]: With dead ends: 9270 [2021-08-06 20:40:37,974 INFO L226 Difference]: Without dead ends: 9260 [2021-08-06 20:40:37,975 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 5482.7ms TimeCoverageRelationStatistics Valid=398, Invalid=2572, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 20:40:37,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9260 states. [2021-08-06 20:40:38,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9260 to 8796. [2021-08-06 20:40:38,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8796 states, 8795 states have (on average 2.309039226833428) internal successors, (20308), 8795 states have internal predecessors, (20308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:38,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8796 states to 8796 states and 20308 transitions. [2021-08-06 20:40:38,083 INFO L78 Accepts]: Start accepts. Automaton has 8796 states and 20308 transitions. Word has length 30 [2021-08-06 20:40:38,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:40:38,083 INFO L470 AbstractCegarLoop]: Abstraction has 8796 states and 20308 transitions. [2021-08-06 20:40:38,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:38,083 INFO L276 IsEmpty]: Start isEmpty. Operand 8796 states and 20308 transitions. [2021-08-06 20:40:38,092 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:40:38,092 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:40:38,092 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:40:38,120 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 20:40:38,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:40:38,293 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:40:38,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:40:38,293 INFO L82 PathProgramCache]: Analyzing trace with hash -326502646, now seen corresponding path program 76 times [2021-08-06 20:40:38,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:40:38,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834733386] [2021-08-06 20:40:38,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:40:38,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:40:38,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:40:38,403 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 288, result has 19.3 percent of original size [2021-08-06 20:40:38,422 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 288, result has 19.3 percent of original size [2021-08-06 20:40:38,488 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 160, result has 46.1 percent of original size [2021-08-06 20:40:38,520 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 160, result has 46.1 percent of original size [2021-08-06 20:40:38,676 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 160, result has 47.0 percent of original size [2021-08-06 20:40:38,714 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 160, result has 47.0 percent of original size [2021-08-06 20:40:38,962 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 162, result has 60.1 percent of original size [2021-08-06 20:40:39,004 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 162, result has 60.1 percent of original size [2021-08-06 20:40:39,157 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 141, result has 61.0 percent of original size [2021-08-06 20:40:39,185 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 141, result has 61.0 percent of original size [2021-08-06 20:40:39,350 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:39,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:40:39,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834733386] [2021-08-06 20:40:39,350 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834733386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:39,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50614164] [2021-08-06 20:40:39,350 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:40:39,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:40:39,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:40:39,351 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 20:40:39,352 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 20:40:43,690 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:40:43,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:40:43,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-06 20:40:43,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:40:46,418 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 20:40:46,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 246 treesize of output 154 [2021-08-06 20:40:46,669 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:40:46,670 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:40:46,675 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:46,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50614164] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:46,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:40:46,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 20:40:46,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456157907] [2021-08-06 20:40:46,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:40:46,676 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:40:46,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:40:46,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:40:46,676 INFO L87 Difference]: Start difference. First operand 8796 states and 20308 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:51,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:40:51,796 INFO L93 Difference]: Finished difference Result 9680 states and 21814 transitions. [2021-08-06 20:40:51,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 20:40:51,796 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:40:51,796 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:40:51,810 INFO L225 Difference]: With dead ends: 9680 [2021-08-06 20:40:51,811 INFO L226 Difference]: Without dead ends: 9670 [2021-08-06 20:40:51,811 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 5388.2ms TimeCoverageRelationStatistics Valid=406, Invalid=2674, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 20:40:51,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9670 states. [2021-08-06 20:40:51,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9670 to 8808. [2021-08-06 20:40:51,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8808 states, 8807 states have (on average 2.3091858748722607) internal successors, (20337), 8807 states have internal predecessors, (20337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:51,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8808 states to 8808 states and 20337 transitions. [2021-08-06 20:40:51,940 INFO L78 Accepts]: Start accepts. Automaton has 8808 states and 20337 transitions. Word has length 30 [2021-08-06 20:40:51,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:40:51,940 INFO L470 AbstractCegarLoop]: Abstraction has 8808 states and 20337 transitions. [2021-08-06 20:40:51,940 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:40:51,940 INFO L276 IsEmpty]: Start isEmpty. Operand 8808 states and 20337 transitions. [2021-08-06 20:40:51,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:40:51,951 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:40:51,951 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:40:51,982 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-06 20:40:52,151 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:40:52,152 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:40:52,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:40:52,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1817997558, now seen corresponding path program 77 times [2021-08-06 20:40:52,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:40:52,152 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384231976] [2021-08-06 20:40:52,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:40:52,152 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:40:52,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:40:52,225 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 81.7 percent of original size [2021-08-06 20:40:52,317 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 81.7 percent of original size [2021-08-06 20:40:52,365 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 70, result has 72.4 percent of original size [2021-08-06 20:40:52,385 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 70, result has 72.4 percent of original size [2021-08-06 20:40:52,486 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 70, result has 73.0 percent of original size [2021-08-06 20:40:52,507 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 70, result has 73.0 percent of original size [2021-08-06 20:40:52,622 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 88.8 percent of original size [2021-08-06 20:40:52,663 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 88.8 percent of original size [2021-08-06 20:40:52,897 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 88.5 percent of original size [2021-08-06 20:40:52,925 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 88.5 percent of original size [2021-08-06 20:40:53,142 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 26, result has 87.4 percent of original size [2021-08-06 20:40:53,158 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 26, result has 87.4 percent of original size [2021-08-06 20:40:53,240 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 42, result has 55.3 percent of original size [2021-08-06 20:40:53,245 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 42, result has 55.3 percent of original size [2021-08-06 20:40:53,285 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 42, result has 53.8 percent of original size [2021-08-06 20:40:53,289 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 42, result has 53.8 percent of original size [2021-08-06 20:40:53,360 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:40:53,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:40:53,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384231976] [2021-08-06 20:40:53,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [384231976] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:40:53,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [540197620] [2021-08-06 20:40:53,360 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:40:53,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:40:53,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:40:53,361 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 20:40:53,362 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 20:40:57,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:40:57,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:40:57,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:40:57,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:41:00,136 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:41:00,138 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:41:00,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:41:00,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:41:00,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:41:00,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 168 [2021-08-06 20:41:03,134 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:41:03,135 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:41:03,140 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:03,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [540197620] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:03,141 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:41:03,141 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 20:41:03,141 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930659968] [2021-08-06 20:41:03,141 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:41:03,141 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:41:03,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:41:03,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:41:03,141 INFO L87 Difference]: Start difference. First operand 8808 states and 20337 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:10,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:41:10,770 INFO L93 Difference]: Finished difference Result 11404 states and 26155 transitions. [2021-08-06 20:41:10,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-06 20:41:10,770 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:41:10,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:41:10,785 INFO L225 Difference]: With dead ends: 11404 [2021-08-06 20:41:10,785 INFO L226 Difference]: Without dead ends: 11394 [2021-08-06 20:41:10,785 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 7386.5ms TimeCoverageRelationStatistics Valid=436, Invalid=4120, Unknown=0, NotChecked=0, Total=4556 [2021-08-06 20:41:10,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11394 states. [2021-08-06 20:41:10,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11394 to 8822. [2021-08-06 20:41:10,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8822 states, 8821 states have (on average 2.309148622605147) internal successors, (20369), 8821 states have internal predecessors, (20369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8822 states to 8822 states and 20369 transitions. [2021-08-06 20:41:10,909 INFO L78 Accepts]: Start accepts. Automaton has 8822 states and 20369 transitions. Word has length 30 [2021-08-06 20:41:10,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:41:10,909 INFO L470 AbstractCegarLoop]: Abstraction has 8822 states and 20369 transitions. [2021-08-06 20:41:10,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:10,909 INFO L276 IsEmpty]: Start isEmpty. Operand 8822 states and 20369 transitions. [2021-08-06 20:41:10,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:41:10,918 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:41:10,918 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:41:10,947 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-06 20:41:11,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-06 20:41:11,119 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:41:11,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:41:11,119 INFO L82 PathProgramCache]: Analyzing trace with hash -253359538, now seen corresponding path program 78 times [2021-08-06 20:41:11,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:41:11,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626280859] [2021-08-06 20:41:11,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:41:11,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:41:11,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:41:11,244 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 80.8 percent of original size [2021-08-06 20:41:11,249 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 80.8 percent of original size [2021-08-06 20:41:11,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 41, result has 85.9 percent of original size [2021-08-06 20:41:11,352 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 41, result has 85.9 percent of original size [2021-08-06 20:41:11,506 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 94.7 percent of original size [2021-08-06 20:41:11,551 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 94.7 percent of original size [2021-08-06 20:41:11,719 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 16, result has 94.5 percent of original size [2021-08-06 20:41:11,748 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 16, result has 94.5 percent of original size [2021-08-06 20:41:11,894 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 96.7 percent of original size [2021-08-06 20:41:11,917 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 96.7 percent of original size [2021-08-06 20:41:12,009 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 99, result has 51.2 percent of original size [2021-08-06 20:41:12,019 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 99, result has 51.2 percent of original size [2021-08-06 20:41:12,070 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 99, result has 50.5 percent of original size [2021-08-06 20:41:12,080 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 99, result has 50.5 percent of original size [2021-08-06 20:41:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:12,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:41:12,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626280859] [2021-08-06 20:41:12,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626280859] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:12,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946924183] [2021-08-06 20:41:12,144 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:41:12,144 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:41:12,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:41:12,144 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 20:41:12,145 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 20:41:16,864 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:41:16,864 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:41:16,865 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:41:16,866 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:41:22,852 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:41:22,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 154 [2021-08-06 20:41:23,165 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 72.7 percent of original size [2021-08-06 20:41:23,170 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 72.7 percent of original size [2021-08-06 20:41:23,311 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:41:23,312 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:41:23,318 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:23,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946924183] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:23,318 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:41:23,318 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:41:23,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256349124] [2021-08-06 20:41:23,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:41:23,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:41:23,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:41:23,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:41:23,319 INFO L87 Difference]: Start difference. First operand 8822 states and 20369 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:27,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:41:27,267 INFO L93 Difference]: Finished difference Result 10694 states and 24476 transitions. [2021-08-06 20:41:27,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:41:27,267 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:41:27,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:41:27,287 INFO L225 Difference]: With dead ends: 10694 [2021-08-06 20:41:27,287 INFO L226 Difference]: Without dead ends: 10679 [2021-08-06 20:41:27,288 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 3868.0ms TimeCoverageRelationStatistics Valid=443, Invalid=1909, Unknown=0, NotChecked=0, Total=2352 [2021-08-06 20:41:27,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10679 states. [2021-08-06 20:41:27,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10679 to 8860. [2021-08-06 20:41:27,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8860 states, 8859 states have (on average 2.307596794220567) internal successors, (20443), 8859 states have internal predecessors, (20443), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:27,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8860 states to 8860 states and 20443 transitions. [2021-08-06 20:41:27,445 INFO L78 Accepts]: Start accepts. Automaton has 8860 states and 20443 transitions. Word has length 30 [2021-08-06 20:41:27,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:41:27,445 INFO L470 AbstractCegarLoop]: Abstraction has 8860 states and 20443 transitions. [2021-08-06 20:41:27,445 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:27,446 INFO L276 IsEmpty]: Start isEmpty. Operand 8860 states and 20443 transitions. [2021-08-06 20:41:27,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:41:27,455 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:41:27,455 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:41:27,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-08-06 20:41:27,655 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:41:27,656 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:41:27,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:41:27,656 INFO L82 PathProgramCache]: Analyzing trace with hash 1854210510, now seen corresponding path program 79 times [2021-08-06 20:41:27,656 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:41:27,656 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297491619] [2021-08-06 20:41:27,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:41:27,656 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:41:27,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:41:27,861 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 619, result has 14.7 percent of original size [2021-08-06 20:41:27,900 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 619, result has 14.7 percent of original size [2021-08-06 20:41:28,006 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 281, result has 48.3 percent of original size [2021-08-06 20:41:28,067 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 281, result has 48.3 percent of original size [2021-08-06 20:41:28,200 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 281, result has 48.7 percent of original size [2021-08-06 20:41:28,263 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 281, result has 48.7 percent of original size [2021-08-06 20:41:28,418 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 288, result has 61.0 percent of original size [2021-08-06 20:41:28,575 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 288, result has 61.0 percent of original size [2021-08-06 20:41:28,841 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 179, result has 61.9 percent of original size [2021-08-06 20:41:28,891 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 179, result has 61.9 percent of original size [2021-08-06 20:41:29,034 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 65, result has 62.6 percent of original size [2021-08-06 20:41:29,044 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 65, result has 62.6 percent of original size [2021-08-06 20:41:29,101 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 48, result has 68.4 percent of original size [2021-08-06 20:41:29,109 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 48, result has 68.4 percent of original size [2021-08-06 20:41:29,188 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:29,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:41:29,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297491619] [2021-08-06 20:41:29,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297491619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:29,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378671047] [2021-08-06 20:41:29,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:41:29,189 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:41:29,189 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:41:29,189 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 20:41:29,190 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 20:41:33,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:41:33,964 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:41:33,965 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:41:36,711 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-06 20:41:36,711 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 244 treesize of output 154 [2021-08-06 20:41:37,072 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:41:37,073 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:41:37,078 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:37,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1378671047] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:37,078 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:41:37,078 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 20:41:37,078 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461114596] [2021-08-06 20:41:37,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:41:37,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:41:37,079 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:41:37,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:41:37,079 INFO L87 Difference]: Start difference. First operand 8860 states and 20443 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:42,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:41:42,694 INFO L93 Difference]: Finished difference Result 9713 states and 21890 transitions. [2021-08-06 20:41:42,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-06 20:41:42,694 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:41:42,694 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:41:42,707 INFO L225 Difference]: With dead ends: 9713 [2021-08-06 20:41:42,707 INFO L226 Difference]: Without dead ends: 9703 [2021-08-06 20:41:42,707 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 845 ImplicationChecksByTransitivity, 5871.8ms TimeCoverageRelationStatistics Valid=436, Invalid=2644, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 20:41:42,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9703 states. [2021-08-06 20:41:42,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9703 to 8872. [2021-08-06 20:41:42,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8872 states, 8871 states have (on average 2.306955247435464) internal successors, (20465), 8871 states have internal predecessors, (20465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:42,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8872 states to 8872 states and 20465 transitions. [2021-08-06 20:41:42,860 INFO L78 Accepts]: Start accepts. Automaton has 8872 states and 20465 transitions. Word has length 30 [2021-08-06 20:41:42,860 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:41:42,860 INFO L470 AbstractCegarLoop]: Abstraction has 8872 states and 20465 transitions. [2021-08-06 20:41:42,860 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:41:42,860 INFO L276 IsEmpty]: Start isEmpty. Operand 8872 states and 20465 transitions. [2021-08-06 20:41:42,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:41:42,869 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:41:42,869 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:41:42,899 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 20:41:43,070 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:41:43,070 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:41:43,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:41:43,071 INFO L82 PathProgramCache]: Analyzing trace with hash 362715598, now seen corresponding path program 80 times [2021-08-06 20:41:43,071 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:41:43,071 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640364231] [2021-08-06 20:41:43,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:41:43,071 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:41:43,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:41:43,148 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 32, result has 70.9 percent of original size [2021-08-06 20:41:43,156 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 32, result has 70.9 percent of original size [2021-08-06 20:41:43,206 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 128, result has 46.9 percent of original size [2021-08-06 20:41:43,216 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 128, result has 46.9 percent of original size [2021-08-06 20:41:43,290 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 128, result has 48.4 percent of original size [2021-08-06 20:41:43,303 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 128, result has 48.4 percent of original size [2021-08-06 20:41:43,393 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 141, result has 66.7 percent of original size [2021-08-06 20:41:43,426 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 141, result has 66.7 percent of original size [2021-08-06 20:41:43,603 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 141, result has 66.0 percent of original size [2021-08-06 20:41:43,625 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 141, result has 66.0 percent of original size [2021-08-06 20:41:43,786 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 31, result has 88.3 percent of original size [2021-08-06 20:41:43,808 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 31, result has 88.3 percent of original size [2021-08-06 20:41:43,903 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 85.3 percent of original size [2021-08-06 20:41:43,910 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 85.3 percent of original size [2021-08-06 20:41:43,952 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 15, result has 84.8 percent of original size [2021-08-06 20:41:43,959 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 15, result has 84.8 percent of original size [2021-08-06 20:41:44,030 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:44,030 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:41:44,030 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640364231] [2021-08-06 20:41:44,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [640364231] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:44,031 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925619424] [2021-08-06 20:41:44,031 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:41:44,031 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:41:44,031 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:41:44,031 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 20:41:44,032 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 20:41:49,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:41:49,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:41:49,060 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-06 20:41:49,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:41:51,303 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:41:51,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:41:51,306 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:41:51,307 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-06 20:41:51,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-06 20:41:51,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 7 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 234 treesize of output 168 [2021-08-06 20:41:52,937 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:41:52,938 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:41:52,943 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:41:52,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925619424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:41:52,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:41:52,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-06 20:41:52,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [375902485] [2021-08-06 20:41:52,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:41:52,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:41:52,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:41:52,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=405, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:41:52,944 INFO L87 Difference]: Start difference. First operand 8872 states and 20465 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:01,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:01,916 INFO L93 Difference]: Finished difference Result 11464 states and 26274 transitions. [2021-08-06 20:42:01,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-06 20:42:01,917 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:42:01,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:01,934 INFO L225 Difference]: With dead ends: 11464 [2021-08-06 20:42:01,934 INFO L226 Difference]: Without dead ends: 11454 [2021-08-06 20:42:01,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1159 ImplicationChecksByTransitivity, 8669.0ms TimeCoverageRelationStatistics Valid=407, Invalid=3753, Unknown=0, NotChecked=0, Total=4160 [2021-08-06 20:42:01,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11454 states. [2021-08-06 20:42:02,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11454 to 8882. [2021-08-06 20:42:02,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8882 states, 8881 states have (on average 2.3069474158315506) internal successors, (20488), 8881 states have internal predecessors, (20488), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:02,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8882 states to 8882 states and 20488 transitions. [2021-08-06 20:42:02,089 INFO L78 Accepts]: Start accepts. Automaton has 8882 states and 20488 transitions. Word has length 30 [2021-08-06 20:42:02,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:02,089 INFO L470 AbstractCegarLoop]: Abstraction has 8882 states and 20488 transitions. [2021-08-06 20:42:02,089 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:02,090 INFO L276 IsEmpty]: Start isEmpty. Operand 8882 states and 20488 transitions. [2021-08-06 20:42:02,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:42:02,100 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:02,100 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:42:02,131 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 20:42:02,300 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:02,301 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:02,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:02,301 INFO L82 PathProgramCache]: Analyzing trace with hash 2107999634, now seen corresponding path program 81 times [2021-08-06 20:42:02,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:02,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103282287] [2021-08-06 20:42:02,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:02,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:02,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:02,387 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 278, result has 29.6 percent of original size [2021-08-06 20:42:02,406 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 278, result has 29.6 percent of original size [2021-08-06 20:42:02,462 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 230, result has 41.6 percent of original size [2021-08-06 20:42:02,480 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 230, result has 41.6 percent of original size [2021-08-06 20:42:02,558 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 230, result has 42.5 percent of original size [2021-08-06 20:42:02,579 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 230, result has 42.5 percent of original size [2021-08-06 20:42:02,674 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 110, result has 77.3 percent of original size [2021-08-06 20:42:02,724 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 110, result has 77.3 percent of original size [2021-08-06 20:42:02,971 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 110, result has 77.0 percent of original size [2021-08-06 20:42:03,010 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 110, result has 77.0 percent of original size [2021-08-06 20:42:03,163 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 146, result has 45.1 percent of original size [2021-08-06 20:42:03,176 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 146, result has 45.1 percent of original size [2021-08-06 20:42:03,249 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 146, result has 44.5 percent of original size [2021-08-06 20:42:03,261 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 146, result has 44.5 percent of original size [2021-08-06 20:42:03,330 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 88, result has 38.9 percent of original size [2021-08-06 20:42:03,334 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 88, result has 38.9 percent of original size [2021-08-06 20:42:03,405 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:03,406 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:03,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103282287] [2021-08-06 20:42:03,406 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103282287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:03,406 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475977920] [2021-08-06 20:42:03,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-06 20:42:03,406 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:03,406 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:42:03,407 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 20:42:03,407 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 20:42:08,552 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-06 20:42:08,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:42:08,553 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:42:08,554 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:42:11,070 INFO L354 Elim1Store]: treesize reduction 24, result has 63.1 percent of original size [2021-08-06 20:42:11,070 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 246 treesize of output 190 [2021-08-06 20:42:14,709 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:14,709 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [475977920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:14,709 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:42:14,709 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:42:14,709 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932661493] [2021-08-06 20:42:14,709 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:42:14,709 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:42:14,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:42:14,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:42:14,710 INFO L87 Difference]: Start difference. First operand 8882 states and 20488 transitions. Second operand has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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 20:42:19,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:19,902 INFO L93 Difference]: Finished difference Result 11561 states and 26429 transitions. [2021-08-06 20:42:19,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-06 20:42:19,903 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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 30 [2021-08-06 20:42:19,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:19,920 INFO L225 Difference]: With dead ends: 11561 [2021-08-06 20:42:19,921 INFO L226 Difference]: Without dead ends: 11546 [2021-08-06 20:42:19,921 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1372 ImplicationChecksByTransitivity, 5165.6ms TimeCoverageRelationStatistics Valid=521, Invalid=3901, Unknown=0, NotChecked=0, Total=4422 [2021-08-06 20:42:19,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11546 states. [2021-08-06 20:42:20,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11546 to 8924. [2021-08-06 20:42:20,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8924 states, 8923 states have (on average 2.305278493780119) internal successors, (20570), 8923 states have internal predecessors, (20570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:20,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8924 states to 8924 states and 20570 transitions. [2021-08-06 20:42:20,124 INFO L78 Accepts]: Start accepts. Automaton has 8924 states and 20570 transitions. Word has length 30 [2021-08-06 20:42:20,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:20,124 INFO L470 AbstractCegarLoop]: Abstraction has 8924 states and 20570 transitions. [2021-08-06 20:42:20,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.260869565217391) internal successors, (52), 23 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 20:42:20,124 INFO L276 IsEmpty]: Start isEmpty. Operand 8924 states and 20570 transitions. [2021-08-06 20:42:20,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:42:20,133 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:20,133 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:42:20,165 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-06 20:42:20,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-06 20:42:20,334 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:20,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:20,334 INFO L82 PathProgramCache]: Analyzing trace with hash -1009936758, now seen corresponding path program 29 times [2021-08-06 20:42:20,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:20,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799317440] [2021-08-06 20:42:20,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:20,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:20,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:20,448 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 82, result has 32.2 percent of original size [2021-08-06 20:42:20,455 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 82, result has 32.2 percent of original size [2021-08-06 20:42:20,493 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 98, result has 36.4 percent of original size [2021-08-06 20:42:20,500 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 98, result has 36.4 percent of original size [2021-08-06 20:42:20,563 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 513, result has 24.3 percent of original size [2021-08-06 20:42:20,611 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 513, result has 24.3 percent of original size [2021-08-06 20:42:20,799 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 544, result has 26.4 percent of original size [2021-08-06 20:42:20,857 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 544, result has 26.4 percent of original size [2021-08-06 20:42:21,028 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 798, result has 29.9 percent of original size [2021-08-06 20:42:21,201 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 798, result has 29.9 percent of original size [2021-08-06 20:42:21,471 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 608, result has 35.2 percent of original size [2021-08-06 20:42:21,593 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 608, result has 35.2 percent of original size [2021-08-06 20:42:21,807 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 270, result has 48.5 percent of original size [2021-08-06 20:42:21,843 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 270, result has 48.5 percent of original size [2021-08-06 20:42:21,937 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 60, result has 53.8 percent of original size [2021-08-06 20:42:21,942 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 60, result has 53.8 percent of original size [2021-08-06 20:42:22,024 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:22,024 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:22,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799317440] [2021-08-06 20:42:22,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799317440] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:22,024 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [304160442] [2021-08-06 20:42:22,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:42:22,024 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:22,024 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:42:22,025 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 20:42:22,026 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 20:42:27,333 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:42:27,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:42:27,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-06 20:42:27,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:42:30,043 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-06 20:42:30,044 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 256 treesize of output 157 [2021-08-06 20:42:30,295 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:42:30,296 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:42:30,301 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:30,302 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [304160442] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:30,302 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:42:30,302 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-08-06 20:42:30,302 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [249096041] [2021-08-06 20:42:30,302 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-06 20:42:30,302 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:42:30,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-06 20:42:30,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-08-06 20:42:30,303 INFO L87 Difference]: Start difference. First operand 8924 states and 20570 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 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 20:42:38,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:38,062 INFO L93 Difference]: Finished difference Result 8998 states and 20666 transitions. [2021-08-06 20:42:38,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-06 20:42:38,063 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 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 30 [2021-08-06 20:42:38,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:38,075 INFO L225 Difference]: With dead ends: 8998 [2021-08-06 20:42:38,075 INFO L226 Difference]: Without dead ends: 8988 [2021-08-06 20:42:38,075 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 648 ImplicationChecksByTransitivity, 7858.7ms TimeCoverageRelationStatistics Valid=361, Invalid=2609, Unknown=0, NotChecked=0, Total=2970 [2021-08-06 20:42:38,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8988 states. [2021-08-06 20:42:38,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8988 to 8928. [2021-08-06 20:42:38,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8928 states, 8927 states have (on average 2.30480564579366) internal successors, (20575), 8927 states have internal predecessors, (20575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8928 states to 8928 states and 20575 transitions. [2021-08-06 20:42:38,189 INFO L78 Accepts]: Start accepts. Automaton has 8928 states and 20575 transitions. Word has length 30 [2021-08-06 20:42:38,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:38,189 INFO L470 AbstractCegarLoop]: Abstraction has 8928 states and 20575 transitions. [2021-08-06 20:42:38,189 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 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 20:42:38,189 INFO L276 IsEmpty]: Start isEmpty. Operand 8928 states and 20575 transitions. [2021-08-06 20:42:38,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:42:38,199 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:38,199 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:42:38,232 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 20:42:38,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-06 20:42:38,399 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:38,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:38,400 INFO L82 PathProgramCache]: Analyzing trace with hash -1638369398, now seen corresponding path program 82 times [2021-08-06 20:42:38,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:38,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321736741] [2021-08-06 20:42:38,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:38,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:38,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:38,589 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 14, result has 92.4 percent of original size [2021-08-06 20:42:38,614 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 14, result has 92.4 percent of original size [2021-08-06 20:42:39,061 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 6, result has 92.0 percent of original size [2021-08-06 20:42:39,065 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 6, result has 92.0 percent of original size [2021-08-06 20:42:39,209 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:39,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:39,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321736741] [2021-08-06 20:42:39,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321736741] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:39,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524803579] [2021-08-06 20:42:39,210 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-06 20:42:39,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:39,210 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:42:39,211 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 20:42:39,211 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 20:42:44,686 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-06 20:42:44,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:42:44,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:42:44,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:42:49,049 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:42:49,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 154 [2021-08-06 20:42:49,332 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:42:49,333 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:42:49,338 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:49,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524803579] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:49,339 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:42:49,339 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-06 20:42:49,339 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405964925] [2021-08-06 20:42:49,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-06 20:42:49,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:42:49,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-06 20:42:49,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-08-06 20:42:49,339 INFO L87 Difference]: Start difference. First operand 8928 states and 20575 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 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 20:42:53,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:42:53,152 INFO L93 Difference]: Finished difference Result 12335 states and 27814 transitions. [2021-08-06 20:42:53,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 20:42:53,152 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 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 30 [2021-08-06 20:42:53,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:42:53,170 INFO L225 Difference]: With dead ends: 12335 [2021-08-06 20:42:53,170 INFO L226 Difference]: Without dead ends: 12291 [2021-08-06 20:42:53,170 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 876 ImplicationChecksByTransitivity, 3776.1ms TimeCoverageRelationStatistics Valid=569, Invalid=2293, Unknown=0, NotChecked=0, Total=2862 [2021-08-06 20:42:53,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12291 states. [2021-08-06 20:42:53,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12291 to 9001. [2021-08-06 20:42:53,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9001 states, 9000 states have (on average 2.3066666666666666) internal successors, (20760), 9000 states have internal predecessors, (20760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:42:53,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9001 states to 9001 states and 20760 transitions. [2021-08-06 20:42:53,321 INFO L78 Accepts]: Start accepts. Automaton has 9001 states and 20760 transitions. Word has length 30 [2021-08-06 20:42:53,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:42:53,321 INFO L470 AbstractCegarLoop]: Abstraction has 9001 states and 20760 transitions. [2021-08-06 20:42:53,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 23 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 20:42:53,321 INFO L276 IsEmpty]: Start isEmpty. Operand 9001 states and 20760 transitions. [2021-08-06 20:42:53,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:42:53,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:42:53,334 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:42:53,375 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 20:42:53,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-06 20:42:53,561 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:42:53,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:42:53,561 INFO L82 PathProgramCache]: Analyzing trace with hash 106914638, now seen corresponding path program 83 times [2021-08-06 20:42:53,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:42:53,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912070845] [2021-08-06 20:42:53,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:42:53,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:42:53,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:42:53,901 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 94.9 percent of original size [2021-08-06 20:42:53,906 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 94.9 percent of original size [2021-08-06 20:42:54,013 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 44, result has 83.8 percent of original size [2021-08-06 20:42:54,123 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 44, result has 83.8 percent of original size [2021-08-06 20:42:54,258 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 95.0 percent of original size [2021-08-06 20:42:54,277 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 95.0 percent of original size [2021-08-06 20:42:54,408 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 95.8 percent of original size [2021-08-06 20:42:54,419 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 95.8 percent of original size [2021-08-06 20:42:54,513 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 95.5 percent of original size [2021-08-06 20:42:54,522 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 95.5 percent of original size [2021-08-06 20:42:54,605 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 95.4 percent of original size [2021-08-06 20:42:54,614 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 95.4 percent of original size [2021-08-06 20:42:54,689 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 22, result has 75.8 percent of original size [2021-08-06 20:42:54,694 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 22, result has 75.8 percent of original size [2021-08-06 20:42:54,756 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:42:54,756 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:42:54,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912070845] [2021-08-06 20:42:54,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912070845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:42:54,756 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018694388] [2021-08-06 20:42:54,756 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-06 20:42:54,757 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:42:54,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:42:54,757 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 20:42:54,758 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 20:43:00,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-06 20:43:00,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:00,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:43:00,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:07,077 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:43:07,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 154 [2021-08-06 20:43:07,214 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:43:07,217 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:43:07,269 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:43:07,273 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:43:07,468 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:43:07,470 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:43:07,475 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:07,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2018694388] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:07,476 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:07,476 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:43:07,476 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545142230] [2021-08-06 20:43:07,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:43:07,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:07,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:43:07,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:43:07,476 INFO L87 Difference]: Start difference. First operand 9001 states and 20760 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:10,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:10,830 INFO L93 Difference]: Finished difference Result 12030 states and 27306 transitions. [2021-08-06 20:43:10,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-06 20:43:10,831 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:43:10,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:10,849 INFO L225 Difference]: With dead ends: 12030 [2021-08-06 20:43:10,849 INFO L226 Difference]: Without dead ends: 12015 [2021-08-06 20:43:10,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 832 ImplicationChecksByTransitivity, 3268.2ms TimeCoverageRelationStatistics Valid=525, Invalid=2231, Unknown=0, NotChecked=0, Total=2756 [2021-08-06 20:43:10,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12015 states. [2021-08-06 20:43:10,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12015 to 9015. [2021-08-06 20:43:10,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9015 states, 9014 states have (on average 2.307077878855114) internal successors, (20796), 9014 states have internal predecessors, (20796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:10,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9015 states to 9015 states and 20796 transitions. [2021-08-06 20:43:10,977 INFO L78 Accepts]: Start accepts. Automaton has 9015 states and 20796 transitions. Word has length 30 [2021-08-06 20:43:10,977 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:10,977 INFO L470 AbstractCegarLoop]: Abstraction has 9015 states and 20796 transitions. [2021-08-06 20:43:10,977 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:10,977 INFO L276 IsEmpty]: Start isEmpty. Operand 9015 states and 20796 transitions. [2021-08-06 20:43:10,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:43:10,986 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:10,986 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:43:11,019 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 20:43:11,188 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-08-06 20:43:11,188 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:11,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:11,188 INFO L82 PathProgramCache]: Analyzing trace with hash 1383241610, now seen corresponding path program 84 times [2021-08-06 20:43:11,189 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:11,189 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035620285] [2021-08-06 20:43:11,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:11,189 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:11,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:11,295 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 82.4 percent of original size [2021-08-06 20:43:11,299 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 82.4 percent of original size [2021-08-06 20:43:11,344 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 25, result has 86.0 percent of original size [2021-08-06 20:43:11,361 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 25, result has 86.0 percent of original size [2021-08-06 20:43:11,464 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 8, result has 96.9 percent of original size [2021-08-06 20:43:11,488 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 8, result has 96.9 percent of original size [2021-08-06 20:43:11,633 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 98.4 percent of original size [2021-08-06 20:43:11,649 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 98.4 percent of original size [2021-08-06 20:43:11,717 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 3, result has 98.3 percent of original size [2021-08-06 20:43:11,730 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 3, result has 98.3 percent of original size [2021-08-06 20:43:11,786 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 82, result has 37.9 percent of original size [2021-08-06 20:43:11,790 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 82, result has 37.9 percent of original size [2021-08-06 20:43:11,821 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 82, result has 36.4 percent of original size [2021-08-06 20:43:11,825 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 82, result has 36.4 percent of original size [2021-08-06 20:43:11,862 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:11,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:11,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035620285] [2021-08-06 20:43:11,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035620285] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:11,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1538556867] [2021-08-06 20:43:11,863 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-06 20:43:11,863 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:11,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:11,864 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 20:43:11,864 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 20:43:17,688 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-06 20:43:17,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:17,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:43:17,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:24,015 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:43:24,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 154 [2021-08-06 20:43:24,156 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:43:24,160 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:43:24,205 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:43:24,208 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 12, result has 40.0 percent of original size [2021-08-06 20:43:24,378 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:43:24,379 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:43:24,384 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:24,384 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1538556867] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:24,384 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:24,384 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:43:24,384 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452028332] [2021-08-06 20:43:24,385 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:43:24,385 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:24,385 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:43:24,385 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:43:24,385 INFO L87 Difference]: Start difference. First operand 9015 states and 20796 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:28,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:28,287 INFO L93 Difference]: Finished difference Result 12093 states and 27404 transitions. [2021-08-06 20:43:28,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 20:43:28,287 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:43:28,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:28,305 INFO L225 Difference]: With dead ends: 12093 [2021-08-06 20:43:28,305 INFO L226 Difference]: Without dead ends: 12078 [2021-08-06 20:43:28,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 946 ImplicationChecksByTransitivity, 3645.2ms TimeCoverageRelationStatistics Valid=599, Invalid=2481, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 20:43:28,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12078 states. [2021-08-06 20:43:28,417 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12078 to 9015. [2021-08-06 20:43:28,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9015 states, 9014 states have (on average 2.3072997559352117) internal successors, (20798), 9014 states have internal predecessors, (20798), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:28,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9015 states to 9015 states and 20798 transitions. [2021-08-06 20:43:28,439 INFO L78 Accepts]: Start accepts. Automaton has 9015 states and 20798 transitions. Word has length 30 [2021-08-06 20:43:28,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:28,439 INFO L470 AbstractCegarLoop]: Abstraction has 9015 states and 20798 transitions. [2021-08-06 20:43:28,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:28,439 INFO L276 IsEmpty]: Start isEmpty. Operand 9015 states and 20798 transitions. [2021-08-06 20:43:28,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:43:28,449 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:28,449 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:43:28,484 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:28,649 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,114 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:28,649 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:28,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:28,650 INFO L82 PathProgramCache]: Analyzing trace with hash 1860571018, now seen corresponding path program 85 times [2021-08-06 20:43:28,650 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:28,650 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470857748] [2021-08-06 20:43:28,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:28,650 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:28,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:28,755 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 241, result has 20.5 percent of original size [2021-08-06 20:43:28,762 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 241, result has 20.5 percent of original size [2021-08-06 20:43:28,813 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 507, result has 32.4 percent of original size [2021-08-06 20:43:28,850 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 507, result has 32.4 percent of original size [2021-08-06 20:43:28,953 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 471, result has 41.5 percent of original size [2021-08-06 20:43:28,998 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 471, result has 41.5 percent of original size [2021-08-06 20:43:29,140 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 288, result has 45.4 percent of original size [2021-08-06 20:43:29,168 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 288, result has 45.4 percent of original size [2021-08-06 20:43:29,260 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 288, result has 45.0 percent of original size [2021-08-06 20:43:29,287 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 288, result has 45.0 percent of original size [2021-08-06 20:43:29,367 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 115, result has 20.1 percent of original size [2021-08-06 20:43:29,369 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 115, result has 20.1 percent of original size [2021-08-06 20:43:29,395 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 116, result has 16.5 percent of original size [2021-08-06 20:43:29,397 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 116, result has 16.5 percent of original size [2021-08-06 20:43:29,430 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:29,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:29,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470857748] [2021-08-06 20:43:29,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1470857748] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:29,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903764855] [2021-08-06 20:43:29,430 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-06 20:43:29,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:29,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:29,431 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 20:43:29,434 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 20:43:35,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:35,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:43:35,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:40,214 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-06 20:43:40,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 154 [2021-08-06 20:43:40,484 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:43:40,485 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:43:40,490 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:40,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903764855] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:40,490 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:40,490 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:43:40,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [994785736] [2021-08-06 20:43:40,491 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:43:40,491 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:40,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:43:40,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:43:40,491 INFO L87 Difference]: Start difference. First operand 9015 states and 20798 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:43,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-06 20:43:43,918 INFO L93 Difference]: Finished difference Result 13768 states and 31049 transitions. [2021-08-06 20:43:43,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-06 20:43:43,919 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-06 20:43:43,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-06 20:43:43,939 INFO L225 Difference]: With dead ends: 13768 [2021-08-06 20:43:43,939 INFO L226 Difference]: Without dead ends: 13753 [2021-08-06 20:43:43,940 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 3230.0ms TimeCoverageRelationStatistics Valid=583, Invalid=2497, Unknown=0, NotChecked=0, Total=3080 [2021-08-06 20:43:43,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13753 states. [2021-08-06 20:43:44,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13753 to 9025. [2021-08-06 20:43:44,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9025 states, 9024 states have (on average 2.3076241134751774) internal successors, (20824), 9024 states have internal predecessors, (20824), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:44,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9025 states to 9025 states and 20824 transitions. [2021-08-06 20:43:44,088 INFO L78 Accepts]: Start accepts. Automaton has 9025 states and 20824 transitions. Word has length 30 [2021-08-06 20:43:44,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-06 20:43:44,088 INFO L470 AbstractCegarLoop]: Abstraction has 9025 states and 20824 transitions. [2021-08-06 20:43:44,088 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-06 20:43:44,088 INFO L276 IsEmpty]: Start isEmpty. Operand 9025 states and 20824 transitions. [2021-08-06 20:43:44,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-06 20:43:44,098 INFO L504 BasicCegarLoop]: Found error trace [2021-08-06 20:43:44,098 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-06 20:43:44,131 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Forceful destruction successful, exit code 0 [2021-08-06 20:43:44,298 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,115 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:44,298 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-06 20:43:44,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-06 20:43:44,298 INFO L82 PathProgramCache]: Analyzing trace with hash 1779681162, now seen corresponding path program 86 times [2021-08-06 20:43:44,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-06 20:43:44,299 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332377610] [2021-08-06 20:43:44,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-06 20:43:44,299 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-06 20:43:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-06 20:43:44,393 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 38, result has 62.0 percent of original size [2021-08-06 20:43:44,397 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 38, result has 62.0 percent of original size [2021-08-06 20:43:44,439 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 28, result has 87.4 percent of original size [2021-08-06 20:43:44,456 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 28, result has 87.4 percent of original size [2021-08-06 20:43:44,548 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 7, result has 97.6 percent of original size [2021-08-06 20:43:44,569 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 7, result has 97.6 percent of original size [2021-08-06 20:43:44,907 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:44,907 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-06 20:43:44,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332377610] [2021-08-06 20:43:44,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332377610] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:44,907 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204457561] [2021-08-06 20:43:44,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-06 20:43:44,908 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-06 20:43:44,908 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-06 20:43:44,908 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 20:43:44,909 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 20:43:51,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-06 20:43:51,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-06 20:43:51,177 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-06 20:43:51,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-06 20:43:54,996 INFO L354 Elim1Store]: treesize reduction 16, result has 61.0 percent of original size [2021-08-06 20:43:54,997 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 244 treesize of output 182 [2021-08-06 20:43:56,372 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 30, result has 70.9 percent of original size [2021-08-06 20:43:56,381 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 30, result has 70.9 percent of original size [2021-08-06 20:43:56,589 WARN L248 tifierPushTermWalker]: Quantifier elimination called on non-simplified input: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:43:56,590 WARN L260 tifierPushTermWalker]: Quantifier elimination failed to simlify output: treesize reduction 9, result has 55.0 percent of original size [2021-08-06 20:43:56,595 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-06 20:43:56,596 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204457561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-06 20:43:56,596 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-06 20:43:56,596 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-06 20:43:56,596 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336131492] [2021-08-06 20:43:56,596 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-06 20:43:56,596 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-06 20:43:56,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-06 20:43:56,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=374, Unknown=0, NotChecked=0, Total=462 [2021-08-06 20:43:56,596 INFO L87 Difference]: Start difference. First operand 9025 states and 20824 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-08-06 20:44:01,468 WARN L223 SmtUtils]: Removed 6 from assertion stack [2021-08-06 20:44:01,468 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 20:44:01,468 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-06 20:44:01,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-06 20:44:01,469 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-06 20:44:01,506 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Forceful destruction successful, exit code 0 [2021-08-06 20:44:01,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2021-08-06 20:44:01,670 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (9025states) and FLOYD_HOARE automaton (currently 51 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 89 for 82ms.. [2021-08-06 20:44:01,671 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-06 20:44:01,671 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-06 20:44:01,671 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-06 20:44:01,675 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-06 20:44:01,675 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-06 20:44:01,678 INFO L202 PluginConnector]: Adding new model min-fun-alt.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.08 08:44:01 BasicIcfg [2021-08-06 20:44:01,678 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-06 20:44:01,679 INFO L168 Benchmark]: Toolchain (without parser) took 702848.44 ms. Allocated memory was 191.9 MB in the beginning and 2.9 GB in the end (delta: 2.7 GB). Free memory was 172.0 MB in the beginning and 1.8 GB in the end (delta: -1.7 GB). Peak memory consumption was 1.1 GB. Max. memory is 8.0 GB. [2021-08-06 20:44:01,679 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 191.9 MB. Free memory was 173.3 MB in the beginning and 173.2 MB in the end (delta: 89.0 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-06 20:44:01,679 INFO L168 Benchmark]: Boogie Procedure Inliner took 29.93 ms. Allocated memory is still 191.9 MB. Free memory was 172.0 MB in the beginning and 170.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 20:44:01,679 INFO L168 Benchmark]: Boogie Preprocessor took 23.80 ms. Allocated memory is still 191.9 MB. Free memory was 170.5 MB in the beginning and 169.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-06 20:44:01,679 INFO L168 Benchmark]: RCFGBuilder took 281.55 ms. Allocated memory is still 191.9 MB. Free memory was 169.4 MB in the beginning and 156.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. [2021-08-06 20:44:01,679 INFO L168 Benchmark]: TraceAbstraction took 702507.48 ms. Allocated memory was 191.9 MB in the beginning and 2.9 GB in the end (delta: 2.7 GB). Free memory was 156.0 MB in the beginning and 1.8 GB in the end (delta: -1.7 GB). Peak memory consumption was 1.0 GB. Max. memory is 8.0 GB. [2021-08-06 20:44:01,679 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.15 ms. Allocated memory is still 191.9 MB. Free memory was 173.3 MB in the beginning and 173.2 MB in the end (delta: 89.0 kB). There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 29.93 ms. Allocated memory is still 191.9 MB. Free memory was 172.0 MB in the beginning and 170.5 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 23.80 ms. Allocated memory is still 191.9 MB. Free memory was 170.5 MB in the beginning and 169.4 MB in the end (delta: 1.1 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 281.55 ms. Allocated memory is still 191.9 MB. Free memory was 169.4 MB in the beginning and 156.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 12.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 702507.48 ms. Allocated memory was 191.9 MB in the beginning and 2.9 GB in the end (delta: 2.7 GB). Free memory was 156.0 MB in the beginning and 1.8 GB in the end (delta: -1.7 GB). Peak memory consumption was 1.0 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 247, positive: 220, positive conditional: 220, positive unconditional: 0, negative: 27, negative conditional: 27, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 220, positive: 220, positive conditional: 0, positive unconditional: 220, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 72, positive: 72, positive conditional: 0, positive unconditional: 72, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 72, positive: 71, positive conditional: 0, positive unconditional: 71, negative: 1, negative conditional: 0, negative unconditional: 1, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 1, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 11, positive: 11, positive conditional: 0, positive unconditional: 11, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 220, positive: 148, positive conditional: 0, positive unconditional: 148, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 72, unknown conditional: 0, unknown unconditional: 72] , Statistics on independence cache: Total cache size (in pairs): 72, Positive cache size: 72, Positive conditional cache size: 0, Positive unconditional cache size: 72, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 27 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 65]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (9025states) and FLOYD_HOARE automaton (currently 51 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 89 for 82ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (9025states) and FLOYD_HOARE automaton (currently 51 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 89 for 82ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (9025states) and FLOYD_HOARE automaton (currently 51 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 89 for 82ms.. - TimeoutResultAtElement [Line: 58]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (9025states) and FLOYD_HOARE automaton (currently 51 states, 22 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 89 for 82ms.. - StatisticsResult: Ultimate Automizer benchmark data for errors in thread instance: ULTIMATE.start with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 702385.8ms, OverallIterations: 118, TraceHistogramMax: 3, EmptinessCheckTime: 449.1ms, AutomataDifference: 153455.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 85.3ms, PartialOrderReductionTime: 72.6ms, HoareTripleCheckerStatistics: 3054 SDtfs, 18983 SDslu, 21519 SDs, 0 SdLazy, 46634 SolverSat, 3931 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 27620.9ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6530 GetRequests, 2419 SyntacticMatches, 136 SemanticMatches, 3974 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48844 ImplicationChecksByTransitivity, 145833.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9893occurred in iteration=98, InterpolantAutomatonStates: 3158, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 5242.9ms AutomataMinimizationTime, 117 MinimizatonAttempts, 79844 StatesRemovedByMinimization, 117 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 415.7ms SsaConstructionTime, 2030.4ms SatisfiabilityAnalysisTime, 210370.8ms InterpolantComputationTime, 6306 NumberOfCodeBlocks, 6306 NumberOfCodeBlocksAsserted, 380 NumberOfCheckSat, 6073 ConstructedInterpolants, 126 QuantifiedInterpolants, 129884 SizeOfPredicates, 509 NumberOfNonLiveVariables, 7925 ConjunctsInSsa, 1943 ConjunctsInUnsatCore, 233 InterpolantComputations, 3 PerfectInterpolantSequences, 397/2020 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown