/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/chl/array-int-symm.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 17:45:34,547 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 17:45:34,549 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 17:45:34,591 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 17:45:34,591 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 17:45:34,594 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 17:45:34,596 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 17:45:34,601 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 17:45:34,603 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 17:45:34,607 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 17:45:34,607 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 17:45:34,609 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 17:45:34,609 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 17:45:34,610 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 17:45:34,612 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 17:45:34,615 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 17:45:34,616 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 17:45:34,616 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 17:45:34,618 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 17:45:34,626 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 17:45:34,629 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 17:45:34,630 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 17:45:34,631 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 17:45:34,633 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 17:45:34,639 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-08-21 17:45:34,639 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-08-21 17:45:34,639 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-08-21 17:45:34,640 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-08-21 17:45:34,640 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-08-21 17:45:34,641 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-08-21 17:45:34,641 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 17:45:34,642 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 17:45:34,642 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 17:45:34,643 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 17:45:34,644 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 17:45:34,644 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 17:45:34,644 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 17:45:34,644 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 17:45:34,645 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 17:45:34,645 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 17:45:34,646 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 17:45:34,648 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf [2021-08-21 17:45:34,678 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 17:45:34,678 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 17:45:34,679 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 17:45:34,679 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 17:45:34,679 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 17:45:34,680 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 17:45:34,680 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 17:45:34,680 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 17:45:34,680 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 17:45:34,680 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 17:45:34,680 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 17:45:34,680 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 17:45:34,680 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 17:45:34,681 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 17:45:34,681 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 17:45:34,681 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 17:45:34,681 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 17:45:34,681 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 17:45:34,681 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 17:45:34,681 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 17:45:34,682 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 17:45:34,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:45:34,682 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 17:45:34,682 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 17:45:34,682 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 17:45:34,682 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 17:45:34,682 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 17:45:34,683 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 17:45:34,683 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 17:45:34,683 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 17:45:34,683 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 17:45:35,014 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 17:45:35,033 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 17:45:35,035 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 17:45:35,036 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 17:45:35,037 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 17:45:35,038 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-symm.wvr.bpl [2021-08-21 17:45:35,038 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/chl/array-int-symm.wvr.bpl' [2021-08-21 17:45:35,059 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 17:45:35,061 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 17:45:35,062 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 17:45:35,062 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 17:45:35,062 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 17:45:35,074 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:45:35" (1/1) ... [2021-08-21 17:45:35,082 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:45:35" (1/1) ... [2021-08-21 17:45:35,089 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 17:45:35,090 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 17:45:35,090 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 17:45:35,091 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 17:45:35,098 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:45:35" (1/1) ... [2021-08-21 17:45:35,098 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:45:35" (1/1) ... [2021-08-21 17:45:35,099 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:45:35" (1/1) ... [2021-08-21 17:45:35,099 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:45:35" (1/1) ... [2021-08-21 17:45:35,102 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:45:35" (1/1) ... [2021-08-21 17:45:35,104 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:45:35" (1/1) ... [2021-08-21 17:45:35,105 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:45:35" (1/1) ... [2021-08-21 17:45:35,106 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 17:45:35,107 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 17:45:35,107 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 17:45:35,108 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 17:45:35,109 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:45:35" (1/1) ... [2021-08-21 17:45:35,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 17:45:35,121 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:35,138 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-08-21 17:45:35,149 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-08-21 17:45:35,179 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 17:45:35,180 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 17:45:35,180 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 17:45:35,180 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 17:45:35,180 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 17:45:35,180 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 17:45:35,180 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 17:45:35,180 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 17:45:35,181 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 17:45:35,181 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-08-21 17:45:35,503 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 17:45:35,504 INFO L299 CfgBuilder]: Removed 2 assume(true) statements. [2021-08-21 17:45:35,504 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-08-21 17:45:35,505 WARN L329 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-08-21 17:45:35,506 INFO L202 PluginConnector]: Adding new model array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:45:35 BoogieIcfgContainer [2021-08-21 17:45:35,506 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 17:45:35,508 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 17:45:35,508 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 17:45:35,511 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 17:45:35,511 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 05:45:35" (1/2) ... [2021-08-21 17:45:35,512 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@229fb6ae and model type array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 05:45:35, skipping insertion in model container [2021-08-21 17:45:35,512 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 05:45:35" (2/2) ... [2021-08-21 17:45:35,513 INFO L111 eAbstractionObserver]: Analyzing ICFG array-int-symm.wvr.bpl [2021-08-21 17:45:35,517 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 17:45:35,518 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 17:45:35,518 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 17:45:35,518 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 17:45:35,567 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-08-21 17:45:35,602 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 17:45:35,608 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-08-21 17:45:35,609 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-08-21 17:45:35,685 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:35,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-08-21 17:45:35,700 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:35,701 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:35,701 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:35,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:35,706 INFO L82 PathProgramCache]: Analyzing trace with hash -580385373, now seen corresponding path program 1 times [2021-08-21 17:45:35,720 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:35,721 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763211909] [2021-08-21 17:45:35,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:35,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:35,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:35,994 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:35,994 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:35,995 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763211909] [2021-08-21 17:45:35,996 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763211909] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:45:35,996 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:45:35,996 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 17:45:35,997 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447118862] [2021-08-21 17:45:36,000 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 17:45:36,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:36,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 17:45:36,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 17:45:36,018 INFO L87 Difference]: Start difference. First operand has 19 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:36,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:36,076 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2021-08-21 17:45:36,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 17:45:36,077 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2021-08-21 17:45:36,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:36,083 INFO L225 Difference]: With dead ends: 40 [2021-08-21 17:45:36,084 INFO L226 Difference]: Without dead ends: 20 [2021-08-21 17:45:36,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 28.7ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:45:36,097 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-21 17:45:36,111 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 14. [2021-08-21 17:45:36,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.2307692307692308) internal successors, (16), 13 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:36,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 16 transitions. [2021-08-21 17:45:36,114 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 16 transitions. Word has length 10 [2021-08-21 17:45:36,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:36,114 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 16 transitions. [2021-08-21 17:45:36,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.5) internal successors, (10), 4 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:36,115 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 16 transitions. [2021-08-21 17:45:36,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-21 17:45:36,115 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:36,116 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:36,116 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 17:45:36,116 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:36,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:36,120 INFO L82 PathProgramCache]: Analyzing trace with hash -845334535, now seen corresponding path program 1 times [2021-08-21 17:45:36,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:36,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662211658] [2021-08-21 17:45:36,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:36,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:36,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:36,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:36,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:36,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662211658] [2021-08-21 17:45:36,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662211658] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 17:45:36,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 17:45:36,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 17:45:36,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119649179] [2021-08-21 17:45:36,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 17:45:36,219 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:36,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 17:45:36,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 17:45:36,222 INFO L87 Difference]: Start difference. First operand 14 states and 16 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:36,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:36,269 INFO L93 Difference]: Finished difference Result 14 states and 15 transitions. [2021-08-21 17:45:36,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:45:36,270 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-21 17:45:36,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:36,271 INFO L225 Difference]: With dead ends: 14 [2021-08-21 17:45:36,271 INFO L226 Difference]: Without dead ends: 12 [2021-08-21 17:45:36,272 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 45.3ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 17:45:36,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-08-21 17:45:36,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-08-21 17:45:36,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.1818181818181819) internal successors, (13), 11 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:36,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 13 transitions. [2021-08-21 17:45:36,278 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 13 transitions. Word has length 11 [2021-08-21 17:45:36,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:36,278 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 13 transitions. [2021-08-21 17:45:36,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:36,280 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 13 transitions. [2021-08-21 17:45:36,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-08-21 17:45:36,280 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:36,280 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:36,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 17:45:36,282 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:36,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:36,283 INFO L82 PathProgramCache]: Analyzing trace with hash -906160713, now seen corresponding path program 1 times [2021-08-21 17:45:36,283 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:36,283 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811322691] [2021-08-21 17:45:36,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:36,284 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:36,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:36,378 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:36,378 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:36,378 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811322691] [2021-08-21 17:45:36,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811322691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:36,379 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789345989] [2021-08-21 17:45:36,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:36,379 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:36,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:36,381 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:36,403 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-08-21 17:45:36,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:36,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 36 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 17:45:36,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:36,618 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:36,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789345989] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:36,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:36,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 17:45:36,619 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [653350247] [2021-08-21 17:45:36,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 17:45:36,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:36,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 17:45:36,620 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 17:45:36,620 INFO L87 Difference]: Start difference. First operand 12 states and 13 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:36,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:36,666 INFO L93 Difference]: Finished difference Result 13 states and 14 transitions. [2021-08-21 17:45:36,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 17:45:36,673 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-08-21 17:45:36,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:36,673 INFO L225 Difference]: With dead ends: 13 [2021-08-21 17:45:36,673 INFO L226 Difference]: Without dead ends: 13 [2021-08-21 17:45:36,674 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 17:45:36,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-08-21 17:45:36,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-08-21 17:45:36,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.1666666666666667) internal successors, (14), 12 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:36,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 14 transitions. [2021-08-21 17:45:36,676 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 14 transitions. Word has length 11 [2021-08-21 17:45:36,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:36,676 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 14 transitions. [2021-08-21 17:45:36,676 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:36,676 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 14 transitions. [2021-08-21 17:45:36,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-08-21 17:45:36,677 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:36,677 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:36,702 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:36,877 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:36,878 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:36,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:36,878 INFO L82 PathProgramCache]: Analyzing trace with hash 1940531813, now seen corresponding path program 1 times [2021-08-21 17:45:36,878 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:36,879 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230379147] [2021-08-21 17:45:36,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:36,879 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:36,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:37,199 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:37,199 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:37,199 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230379147] [2021-08-21 17:45:37,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230379147] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:37,200 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927917628] [2021-08-21 17:45:37,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:37,200 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:37,200 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:37,205 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:37,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-08-21 17:45:37,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:37,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 17 conjunts are in the unsatisfiable core [2021-08-21 17:45:37,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:37,531 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 77 treesize of output 63 [2021-08-21 17:45:37,533 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 63 treesize of output 49 [2021-08-21 17:45:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:37,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927917628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:37,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:37,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 9 [2021-08-21 17:45:37,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017560873] [2021-08-21 17:45:37,626 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 17:45:37,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:37,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 17:45:37,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2021-08-21 17:45:37,627 INFO L87 Difference]: Start difference. First operand 13 states and 14 transitions. Second operand has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:37,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:37,750 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2021-08-21 17:45:37,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 17:45:37,751 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2021-08-21 17:45:37,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:37,751 INFO L225 Difference]: With dead ends: 26 [2021-08-21 17:45:37,751 INFO L226 Difference]: Without dead ends: 23 [2021-08-21 17:45:37,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 208.2ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-21 17:45:37,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-21 17:45:37,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 16. [2021-08-21 17:45:37,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:37,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2021-08-21 17:45:37,754 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 12 [2021-08-21 17:45:37,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:37,755 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2021-08-21 17:45:37,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.2222222222222223) internal successors, (20), 9 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:37,755 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2021-08-21 17:45:37,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 17:45:37,755 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:37,755 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:37,780 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:37,976 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable3 [2021-08-21 17:45:37,977 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:37,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:37,977 INFO L82 PathProgramCache]: Analyzing trace with hash -6313097, now seen corresponding path program 2 times [2021-08-21 17:45:37,977 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:37,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586191120] [2021-08-21 17:45:37,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:37,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:37,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:38,069 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:38,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:38,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586191120] [2021-08-21 17:45:38,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586191120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:38,070 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1528499942] [2021-08-21 17:45:38,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:45:38,070 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:38,070 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:38,073 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:38,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-08-21 17:45:38,143 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:45:38,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:38,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 17:45:38,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:38,342 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-21 17:45:38,346 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-21 17:45:38,395 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:38,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1528499942] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:38,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:38,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 17:45:38,396 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748779145] [2021-08-21 17:45:38,397 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:45:38,397 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:38,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:45:38,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:45:38,398 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:38,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:38,509 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-08-21 17:45:38,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 17:45:38,509 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 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 13 [2021-08-21 17:45:38,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:38,510 INFO L225 Difference]: With dead ends: 17 [2021-08-21 17:45:38,511 INFO L226 Difference]: Without dead ends: 14 [2021-08-21 17:45:38,511 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 174.5ms TimeCoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:45:38,512 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-08-21 17:45:38,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-08-21 17:45:38,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.1538461538461537) internal successors, (15), 13 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:38,514 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 15 transitions. [2021-08-21 17:45:38,514 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 15 transitions. Word has length 13 [2021-08-21 17:45:38,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:38,514 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 15 transitions. [2021-08-21 17:45:38,515 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:38,516 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 15 transitions. [2021-08-21 17:45:38,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-08-21 17:45:38,519 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:38,519 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:38,548 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:38,735 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:38,735 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:38,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:38,736 INFO L82 PathProgramCache]: Analyzing trace with hash -1891924615, now seen corresponding path program 3 times [2021-08-21 17:45:38,736 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:38,736 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34433945] [2021-08-21 17:45:38,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:38,736 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:38,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:38,844 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:38,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:38,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34433945] [2021-08-21 17:45:38,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34433945] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:38,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36827648] [2021-08-21 17:45:38,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:45:38,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:38,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:38,849 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:38,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-08-21 17:45:38,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 17:45:38,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:38,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 17:45:38,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:39,095 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 17:45:39,101 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-21 17:45:39,107 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 17:45:39,136 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:39,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36827648] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:39,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:39,136 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 17:45:39,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [878988483] [2021-08-21 17:45:39,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 17:45:39,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:39,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 17:45:39,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2021-08-21 17:45:39,138 INFO L87 Difference]: Start difference. First operand 14 states and 15 transitions. Second operand has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:39,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:39,205 INFO L93 Difference]: Finished difference Result 15 states and 16 transitions. [2021-08-21 17:45:39,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 17:45:39,206 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 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 13 [2021-08-21 17:45:39,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:39,206 INFO L225 Difference]: With dead ends: 15 [2021-08-21 17:45:39,206 INFO L226 Difference]: Without dead ends: 15 [2021-08-21 17:45:39,206 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 113.2ms TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-08-21 17:45:39,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-08-21 17:45:39,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-08-21 17:45:39,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.1428571428571428) internal successors, (16), 14 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:39,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2021-08-21 17:45:39,208 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 13 [2021-08-21 17:45:39,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:39,209 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2021-08-21 17:45:39,209 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.8) internal successors, (18), 10 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:39,209 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2021-08-21 17:45:39,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-08-21 17:45:39,209 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:39,209 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:39,235 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:39,423 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:39,424 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:39,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:39,424 INFO L82 PathProgramCache]: Analyzing trace with hash 1446621923, now seen corresponding path program 4 times [2021-08-21 17:45:39,424 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:39,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411469435] [2021-08-21 17:45:39,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:39,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:39,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:39,953 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:39,954 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:39,954 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411469435] [2021-08-21 17:45:39,956 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1411469435] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:39,956 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390618249] [2021-08-21 17:45:39,956 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:45:39,956 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:39,956 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:39,961 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:39,962 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-08-21 17:45:40,063 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:45:40,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:40,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 17:45:40,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:40,681 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 17:45:40,682 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 85 treesize of output 72 [2021-08-21 17:45:40,689 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:45:40,690 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 62 treesize of output 53 [2021-08-21 17:45:40,762 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:40,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1390618249] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:40,762 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:40,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 14 [2021-08-21 17:45:40,763 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392219782] [2021-08-21 17:45:40,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 17:45:40,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:40,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 17:45:40,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=152, Unknown=0, NotChecked=0, Total=182 [2021-08-21 17:45:40,764 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:41,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:41,095 INFO L93 Difference]: Finished difference Result 29 states and 31 transitions. [2021-08-21 17:45:41,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 17:45:41,096 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-08-21 17:45:41,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:41,097 INFO L225 Difference]: With dead ends: 29 [2021-08-21 17:45:41,097 INFO L226 Difference]: Without dead ends: 26 [2021-08-21 17:45:41,097 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 560.2ms TimeCoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:45:41,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-21 17:45:41,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 18. [2021-08-21 17:45:41,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:41,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2021-08-21 17:45:41,101 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 14 [2021-08-21 17:45:41,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:41,101 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2021-08-21 17:45:41,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:41,101 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2021-08-21 17:45:41,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 17:45:41,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:41,102 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:41,120 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:41,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:41,305 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:41,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:41,306 INFO L82 PathProgramCache]: Analyzing trace with hash 1862349497, now seen corresponding path program 5 times [2021-08-21 17:45:41,306 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:41,306 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872390535] [2021-08-21 17:45:41,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:41,306 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:41,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:41,476 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:41,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:41,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872390535] [2021-08-21 17:45:41,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872390535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:41,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152924460] [2021-08-21 17:45:41,478 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:45:41,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:41,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:41,497 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:41,498 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-08-21 17:45:41,629 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 17:45:41,629 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:41,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:45:41,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:41,813 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-21 17:45:41,817 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-21 17:45:41,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:41,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152924460] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:41,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:41,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 17:45:41,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613269942] [2021-08-21 17:45:41,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:45:41,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:41,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:45:41,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:45:41,870 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:42,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:42,055 INFO L93 Difference]: Finished difference Result 20 states and 21 transitions. [2021-08-21 17:45:42,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 17:45:42,055 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 17:45:42,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:42,056 INFO L225 Difference]: With dead ends: 20 [2021-08-21 17:45:42,056 INFO L226 Difference]: Without dead ends: 16 [2021-08-21 17:45:42,056 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 255.9ms TimeCoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:45:42,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-08-21 17:45:42,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-08-21 17:45:42,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.1333333333333333) internal successors, (17), 15 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:42,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 17 transitions. [2021-08-21 17:45:42,058 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 17 transitions. Word has length 15 [2021-08-21 17:45:42,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:42,058 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 17 transitions. [2021-08-21 17:45:42,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:42,058 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 17 transitions. [2021-08-21 17:45:42,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-08-21 17:45:42,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:42,059 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:42,086 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:42,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:42,269 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:42,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:42,269 INFO L82 PathProgramCache]: Analyzing trace with hash -757032713, now seen corresponding path program 6 times [2021-08-21 17:45:42,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:42,270 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689629520] [2021-08-21 17:45:42,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:42,270 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:42,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:42,383 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:42,383 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:42,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689629520] [2021-08-21 17:45:42,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689629520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:42,383 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1649316755] [2021-08-21 17:45:42,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:45:42,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:42,384 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:42,384 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:42,385 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-08-21 17:45:42,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 17:45:42,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:42,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 17:45:42,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:42,665 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 17:45:42,670 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 17:45:42,674 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-21 17:45:42,724 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:42,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1649316755] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:42,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:42,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 17:45:42,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645057319] [2021-08-21 17:45:42,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 17:45:42,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:42,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 17:45:42,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=127, Unknown=0, NotChecked=0, Total=156 [2021-08-21 17:45:42,726 INFO L87 Difference]: Start difference. First operand 16 states and 17 transitions. Second operand has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:42,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:42,801 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2021-08-21 17:45:42,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 17:45:42,801 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-08-21 17:45:42,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:42,802 INFO L225 Difference]: With dead ends: 17 [2021-08-21 17:45:42,802 INFO L226 Difference]: Without dead ends: 17 [2021-08-21 17:45:42,802 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 159.8ms TimeCoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-08-21 17:45:42,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-08-21 17:45:42,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-08-21 17:45:42,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.125) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:42,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2021-08-21 17:45:42,804 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 15 [2021-08-21 17:45:42,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:42,804 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2021-08-21 17:45:42,804 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:42,804 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2021-08-21 17:45:42,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-08-21 17:45:42,805 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:42,805 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:42,827 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:43,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:43,021 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:43,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:43,022 INFO L82 PathProgramCache]: Analyzing trace with hash -2026434779, now seen corresponding path program 7 times [2021-08-21 17:45:43,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:43,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1597201640] [2021-08-21 17:45:43,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:43,022 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:43,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:43,747 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:43,747 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:43,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1597201640] [2021-08-21 17:45:43,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1597201640] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:43,747 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1977794168] [2021-08-21 17:45:43,747 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:45:43,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:43,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:43,759 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:43,760 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-08-21 17:45:43,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:43,907 WARN L261 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 41 conjunts are in the unsatisfiable core [2021-08-21 17:45:43,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:44,891 INFO L354 Elim1Store]: treesize reduction 58, result has 4.9 percent of original size [2021-08-21 17:45:44,891 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 96 treesize of output 79 [2021-08-21 17:45:44,900 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:45:44,900 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 62 treesize of output 53 [2021-08-21 17:45:44,981 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:44,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1977794168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:44,981 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:44,981 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 18 [2021-08-21 17:45:44,981 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383459178] [2021-08-21 17:45:44,982 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 17:45:44,982 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:44,982 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 17:45:44,982 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=269, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:45:44,983 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:45,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:45,592 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2021-08-21 17:45:45,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:45:45,593 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-08-21 17:45:45,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:45,593 INFO L225 Difference]: With dead ends: 32 [2021-08-21 17:45:45,593 INFO L226 Difference]: Without dead ends: 29 [2021-08-21 17:45:45,594 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 1048.5ms TimeCoverageRelationStatistics Valid=83, Invalid=469, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:45:45,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-21 17:45:45,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 20. [2021-08-21 17:45:45,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.1578947368421053) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:45,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2021-08-21 17:45:45,599 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 16 [2021-08-21 17:45:45,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:45,600 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2021-08-21 17:45:45,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:45,600 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2021-08-21 17:45:45,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:45:45,600 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:45,600 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:45,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-08-21 17:45:45,801 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,SelfDestructingSolverStorable9 [2021-08-21 17:45:45,801 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:45,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:45,802 INFO L82 PathProgramCache]: Analyzing trace with hash 1571774135, now seen corresponding path program 8 times [2021-08-21 17:45:45,802 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:45,802 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1704127482] [2021-08-21 17:45:45,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:45,802 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:45,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:45,962 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:45,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:45,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1704127482] [2021-08-21 17:45:45,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1704127482] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:45,963 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448673082] [2021-08-21 17:45:45,963 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:45:45,963 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:45,963 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:45,969 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:45,970 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-08-21 17:45:46,141 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:45:46,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:46,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:45:46,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:46,396 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-21 17:45:46,399 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-21 17:45:46,449 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:46,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448673082] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:46,450 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:46,450 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 17:45:46,450 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117712917] [2021-08-21 17:45:46,450 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:45:46,450 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:46,451 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:45:46,451 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:45:46,451 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:46,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:46,653 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2021-08-21 17:45:46,654 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 17:45:46,654 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 17:45:46,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:46,655 INFO L225 Difference]: With dead ends: 23 [2021-08-21 17:45:46,655 INFO L226 Difference]: Without dead ends: 18 [2021-08-21 17:45:46,655 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 314.5ms TimeCoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:45:46,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-08-21 17:45:46,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-08-21 17:45:46,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:46,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2021-08-21 17:45:46,657 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 17 [2021-08-21 17:45:46,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:46,657 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2021-08-21 17:45:46,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:46,657 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2021-08-21 17:45:46,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-08-21 17:45:46,658 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:46,658 INFO L512 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:46,685 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:46,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:46,877 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:46,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:46,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1975304249, now seen corresponding path program 9 times [2021-08-21 17:45:46,877 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:46,877 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893971102] [2021-08-21 17:45:46,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:46,878 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:47,038 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:47,038 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:47,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893971102] [2021-08-21 17:45:47,038 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893971102] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:47,038 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455413960] [2021-08-21 17:45:47,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:45:47,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:47,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:47,040 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:47,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-08-21 17:45:47,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 17:45:47,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:47,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 17:45:47,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:47,437 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 17:45:47,439 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-21 17:45:47,443 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 17:45:47,474 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:47,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455413960] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:47,474 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:47,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 17:45:47,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596391435] [2021-08-21 17:45:47,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 17:45:47,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:47,476 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 17:45:47,476 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=203, Unknown=0, NotChecked=0, Total=240 [2021-08-21 17:45:47,476 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:47,583 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:47,583 INFO L93 Difference]: Finished difference Result 19 states and 20 transitions. [2021-08-21 17:45:47,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 17:45:47,583 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-08-21 17:45:47,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:47,584 INFO L225 Difference]: With dead ends: 19 [2021-08-21 17:45:47,584 INFO L226 Difference]: Without dead ends: 19 [2021-08-21 17:45:47,584 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 187.3ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-21 17:45:47,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-08-21 17:45:47,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-08-21 17:45:47,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.1111111111111112) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:47,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 20 transitions. [2021-08-21 17:45:47,585 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 20 transitions. Word has length 17 [2021-08-21 17:45:47,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:47,586 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 20 transitions. [2021-08-21 17:45:47,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.5) internal successors, (24), 16 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:47,586 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 20 transitions. [2021-08-21 17:45:47,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 17:45:47,586 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:47,586 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:47,604 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:47,789 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,SelfDestructingSolverStorable11 [2021-08-21 17:45:47,789 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:47,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:47,789 INFO L82 PathProgramCache]: Analyzing trace with hash 1071632419, now seen corresponding path program 10 times [2021-08-21 17:45:47,789 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:47,789 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392743507] [2021-08-21 17:45:47,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:47,790 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:47,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:48,359 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:48,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:48,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392743507] [2021-08-21 17:45:48,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [392743507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:48,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1304242254] [2021-08-21 17:45:48,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:45:48,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:48,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:48,360 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:48,361 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-08-21 17:45:48,586 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:45:48,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:48,587 WARN L261 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 57 conjunts are in the unsatisfiable core [2021-08-21 17:45:48,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:50,016 INFO L354 Elim1Store]: treesize reduction 102, result has 2.9 percent of original size [2021-08-21 17:45:50,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 107 treesize of output 86 [2021-08-21 17:45:50,023 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:45:50,023 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 62 treesize of output 53 [2021-08-21 17:45:50,098 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:50,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1304242254] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:50,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:50,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 17:45:50,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779642638] [2021-08-21 17:45:50,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 17:45:50,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:50,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 17:45:50,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=451, Unknown=0, NotChecked=0, Total=506 [2021-08-21 17:45:50,100 INFO L87 Difference]: Start difference. First operand 19 states and 20 transitions. Second operand has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 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) [2021-08-21 17:45:50,796 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:50,796 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2021-08-21 17:45:50,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:45:50,801 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 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 18 [2021-08-21 17:45:50,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:50,804 INFO L225 Difference]: With dead ends: 35 [2021-08-21 17:45:50,804 INFO L226 Difference]: Without dead ends: 32 [2021-08-21 17:45:50,805 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1076.9ms TimeCoverageRelationStatistics Valid=106, Invalid=706, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:45:50,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-21 17:45:50,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 22. [2021-08-21 17:45:50,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:50,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2021-08-21 17:45:50,816 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 18 [2021-08-21 17:45:50,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:50,817 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2021-08-21 17:45:50,817 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.391304347826087) internal successors, (32), 23 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) [2021-08-21 17:45:50,817 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2021-08-21 17:45:50,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:45:50,817 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:50,817 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:50,843 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:51,032 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,SelfDestructingSolverStorable12 [2021-08-21 17:45:51,033 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:51,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:51,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1172390535, now seen corresponding path program 11 times [2021-08-21 17:45:51,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:51,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752813286] [2021-08-21 17:45:51,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:51,034 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:51,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:51,240 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:51,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:51,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752813286] [2021-08-21 17:45:51,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752813286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:51,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1739002967] [2021-08-21 17:45:51,240 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:45:51,241 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:51,241 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:51,245 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:51,246 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-08-21 17:45:51,553 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 17:45:51,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:51,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 17:45:51,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:51,836 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-21 17:45:51,838 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-21 17:45:51,879 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:51,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1739002967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:51,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:51,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 17:45:51,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [625106134] [2021-08-21 17:45:51,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:45:51,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:51,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:45:51,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:45:51,881 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:52,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:52,140 INFO L93 Difference]: Finished difference Result 26 states and 27 transitions. [2021-08-21 17:45:52,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 17:45:52,141 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 17:45:52,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:52,141 INFO L225 Difference]: With dead ends: 26 [2021-08-21 17:45:52,141 INFO L226 Difference]: Without dead ends: 20 [2021-08-21 17:45:52,142 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 410.5ms TimeCoverageRelationStatistics Valid=94, Invalid=556, Unknown=0, NotChecked=0, Total=650 [2021-08-21 17:45:52,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-08-21 17:45:52,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-08-21 17:45:52,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.105263157894737) internal successors, (21), 19 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:52,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 21 transitions. [2021-08-21 17:45:52,143 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 21 transitions. Word has length 19 [2021-08-21 17:45:52,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:52,143 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 21 transitions. [2021-08-21 17:45:52,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:52,144 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 21 transitions. [2021-08-21 17:45:52,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-08-21 17:45:52,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:52,144 INFO L512 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:52,172 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:52,344 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,SelfDestructingSolverStorable13 [2021-08-21 17:45:52,345 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:52,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:52,345 INFO L82 PathProgramCache]: Analyzing trace with hash -1547858889, now seen corresponding path program 12 times [2021-08-21 17:45:52,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:52,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686761201] [2021-08-21 17:45:52,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:52,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:52,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:52,538 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:52,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:52,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686761201] [2021-08-21 17:45:52,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686761201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:52,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291631527] [2021-08-21 17:45:52,538 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:45:52,539 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:52,539 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:52,545 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:52,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-08-21 17:45:52,897 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 17:45:52,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:52,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 17:45:52,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:53,113 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 17:45:53,116 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 17:45:53,123 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-21 17:45:53,162 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:53,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291631527] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:53,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:53,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 17:45:53,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045548609] [2021-08-21 17:45:53,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 17:45:53,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:53,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 17:45:53,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=297, Unknown=0, NotChecked=0, Total=342 [2021-08-21 17:45:53,164 INFO L87 Difference]: Start difference. First operand 20 states and 21 transitions. Second operand has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:53,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:53,302 INFO L93 Difference]: Finished difference Result 21 states and 22 transitions. [2021-08-21 17:45:53,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 17:45:53,302 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-08-21 17:45:53,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:53,302 INFO L225 Difference]: With dead ends: 21 [2021-08-21 17:45:53,302 INFO L226 Difference]: Without dead ends: 21 [2021-08-21 17:45:53,303 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 12 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 239.0ms TimeCoverageRelationStatistics Valid=56, Invalid=364, Unknown=0, NotChecked=0, Total=420 [2021-08-21 17:45:53,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-08-21 17:45:53,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-08-21 17:45:53,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.1) internal successors, (22), 20 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:53,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 22 transitions. [2021-08-21 17:45:53,304 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 22 transitions. Word has length 19 [2021-08-21 17:45:53,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:53,305 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 22 transitions. [2021-08-21 17:45:53,305 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.4210526315789473) internal successors, (27), 19 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:53,305 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 22 transitions. [2021-08-21 17:45:53,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 17:45:53,305 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:53,305 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:53,326 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:53,516 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,SelfDestructingSolverStorable14 [2021-08-21 17:45:53,517 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:53,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:53,517 INFO L82 PathProgramCache]: Analyzing trace with hash -772242459, now seen corresponding path program 13 times [2021-08-21 17:45:53,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:53,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1318845000] [2021-08-21 17:45:53,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:53,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:53,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:53,988 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:53,988 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:53,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1318845000] [2021-08-21 17:45:53,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1318845000] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:53,989 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660538095] [2021-08-21 17:45:53,989 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:45:53,989 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:53,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:53,989 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:53,990 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-08-21 17:45:54,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:54,289 WARN L261 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 69 conjunts are in the unsatisfiable core [2021-08-21 17:45:54,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:56,133 INFO L354 Elim1Store]: treesize reduction 158, result has 1.9 percent of original size [2021-08-21 17:45:56,133 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 118 treesize of output 93 [2021-08-21 17:45:56,141 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:45:56,141 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 62 treesize of output 53 [2021-08-21 17:45:56,244 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:56,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660538095] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:56,244 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:56,244 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 27 [2021-08-21 17:45:56,244 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778685544] [2021-08-21 17:45:56,245 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 17:45:56,245 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:56,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 17:45:56,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:45:56,246 INFO L87 Difference]: Start difference. First operand 21 states and 22 transitions. Second operand has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:57,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:57,127 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2021-08-21 17:45:57,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:45:57,130 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 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 20 [2021-08-21 17:45:57,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:57,130 INFO L225 Difference]: With dead ends: 38 [2021-08-21 17:45:57,130 INFO L226 Difference]: Without dead ends: 35 [2021-08-21 17:45:57,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 1378.4ms TimeCoverageRelationStatistics Valid=125, Invalid=997, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 17:45:57,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-21 17:45:57,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 24. [2021-08-21 17:45:57,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:57,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2021-08-21 17:45:57,132 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 20 [2021-08-21 17:45:57,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:57,132 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2021-08-21 17:45:57,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3333333333333333) internal successors, (36), 27 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:57,133 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2021-08-21 17:45:57,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:45:57,133 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:57,133 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:57,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:57,350 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:57,350 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:57,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:57,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1797030391, now seen corresponding path program 14 times [2021-08-21 17:45:57,351 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:57,351 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838936704] [2021-08-21 17:45:57,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:57,351 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:57,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:57,591 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:57,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:57,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838936704] [2021-08-21 17:45:57,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838936704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:57,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869149912] [2021-08-21 17:45:57,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:45:57,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:57,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:57,601 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:57,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-08-21 17:45:57,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:45:57,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:57,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:45:57,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:58,281 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-21 17:45:58,283 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-21 17:45:58,334 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 6 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:58,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869149912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:58,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:58,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-08-21 17:45:58,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060810128] [2021-08-21 17:45:58,335 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:45:58,335 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:58,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:45:58,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:45:58,336 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:58,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:58,634 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-08-21 17:45:58,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:45:58,634 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:45:58,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:58,635 INFO L225 Difference]: With dead ends: 29 [2021-08-21 17:45:58,635 INFO L226 Difference]: Without dead ends: 22 [2021-08-21 17:45:58,635 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 481.0ms TimeCoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:45:58,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-08-21 17:45:58,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-08-21 17:45:58,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0952380952380953) internal successors, (23), 21 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:58,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 23 transitions. [2021-08-21 17:45:58,636 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 23 transitions. Word has length 21 [2021-08-21 17:45:58,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:58,636 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 23 transitions. [2021-08-21 17:45:58,636 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:58,637 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 23 transitions. [2021-08-21 17:45:58,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-08-21 17:45:58,637 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:58,637 INFO L512 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:58,656 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-08-21 17:45:58,844 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,SelfDestructingSolverStorable16 [2021-08-21 17:45:58,844 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:45:58,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:45:58,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1252553991, now seen corresponding path program 15 times [2021-08-21 17:45:58,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:45:58,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413189554] [2021-08-21 17:45:58,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:45:58,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:45:58,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:45:59,051 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:59,052 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:45:59,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413189554] [2021-08-21 17:45:59,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413189554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:59,052 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349814424] [2021-08-21 17:45:59,052 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:45:59,052 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:45:59,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:45:59,053 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:45:59,054 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-08-21 17:45:59,457 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 17:45:59,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:45:59,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 17:45:59,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:45:59,758 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 17:45:59,760 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 17:45:59,765 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-21 17:45:59,799 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:45:59,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349814424] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:45:59,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:45:59,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-08-21 17:45:59,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114151919] [2021-08-21 17:45:59,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 17:45:59,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:45:59,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 17:45:59,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=409, Unknown=0, NotChecked=0, Total=462 [2021-08-21 17:45:59,801 INFO L87 Difference]: Start difference. First operand 22 states and 23 transitions. Second operand has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:59,975 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:45:59,975 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2021-08-21 17:45:59,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 17:45:59,975 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-08-21 17:45:59,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:45:59,976 INFO L225 Difference]: With dead ends: 23 [2021-08-21 17:45:59,976 INFO L226 Difference]: Without dead ends: 23 [2021-08-21 17:45:59,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 13 SyntacticMatches, 2 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 316.1ms TimeCoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-08-21 17:45:59,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-08-21 17:45:59,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-08-21 17:45:59,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0909090909090908) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:59,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2021-08-21 17:45:59,977 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 21 [2021-08-21 17:45:59,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:45:59,978 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2021-08-21 17:45:59,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.3636363636363635) internal successors, (30), 22 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:45:59,978 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2021-08-21 17:45:59,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 17:45:59,978 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:45:59,978 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:45:59,995 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-08-21 17:46:00,180 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 17:46:00,181 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:00,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:00,182 INFO L82 PathProgramCache]: Analyzing trace with hash -207725213, now seen corresponding path program 16 times [2021-08-21 17:46:00,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:00,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341088780] [2021-08-21 17:46:00,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:00,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:00,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:00,937 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:00,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:00,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341088780] [2021-08-21 17:46:00,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341088780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:00,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1157002154] [2021-08-21 17:46:00,938 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:46:00,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:00,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:00,938 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:00,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-08-21 17:46:01,367 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:46:01,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:01,368 WARN L261 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 77 conjunts are in the unsatisfiable core [2021-08-21 17:46:01,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:03,491 INFO L354 Elim1Store]: treesize reduction 226, result has 1.3 percent of original size [2021-08-21 17:46:03,492 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 7 select indices, 7 select index equivalence classes, 0 disjoint index pairs (out of 21 index pairs), introduced 7 new quantified variables, introduced 21 case distinctions, treesize of input 129 treesize of output 100 [2021-08-21 17:46:03,498 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:46:03,499 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 62 treesize of output 53 [2021-08-21 17:46:03,591 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:03,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1157002154] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:03,592 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:03,592 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 16] total 29 [2021-08-21 17:46:03,592 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752155761] [2021-08-21 17:46:03,592 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 17:46:03,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:03,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 17:46:03,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=751, Unknown=0, NotChecked=0, Total=812 [2021-08-21 17:46:03,593 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:04,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:04,548 INFO L93 Difference]: Finished difference Result 41 states and 43 transitions. [2021-08-21 17:46:04,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 17:46:04,549 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 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 [2021-08-21 17:46:04,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:04,551 INFO L225 Difference]: With dead ends: 41 [2021-08-21 17:46:04,551 INFO L226 Difference]: Without dead ends: 38 [2021-08-21 17:46:04,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 10 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 1748.5ms TimeCoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 17:46:04,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-21 17:46:04,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2021-08-21 17:46:04,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.12) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:04,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2021-08-21 17:46:04,553 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 22 [2021-08-21 17:46:04,553 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:04,553 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2021-08-21 17:46:04,553 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.2413793103448276) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:04,553 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2021-08-21 17:46:04,554 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 17:46:04,554 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:04,554 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:04,572 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-08-21 17:46:04,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:04,757 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:04,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:04,757 INFO L82 PathProgramCache]: Analyzing trace with hash 2117195833, now seen corresponding path program 17 times [2021-08-21 17:46:04,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:04,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218140762] [2021-08-21 17:46:04,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:04,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:04,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:05,014 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:05,015 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:05,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218140762] [2021-08-21 17:46:05,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1218140762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:05,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1571499267] [2021-08-21 17:46:05,015 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:46:05,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:05,015 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:05,020 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:05,021 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-08-21 17:46:05,521 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 17:46:05,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:05,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 17:46:05,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:05,879 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-21 17:46:05,881 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-21 17:46:05,933 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 7 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:05,933 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1571499267] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:05,933 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:05,933 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-08-21 17:46:05,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928430934] [2021-08-21 17:46:05,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 17:46:05,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:05,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 17:46:05,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:46:05,934 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:06,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:06,346 INFO L93 Difference]: Finished difference Result 32 states and 33 transitions. [2021-08-21 17:46:06,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:46:06,346 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 17:46:06,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:06,346 INFO L225 Difference]: With dead ends: 32 [2021-08-21 17:46:06,346 INFO L226 Difference]: Without dead ends: 24 [2021-08-21 17:46:06,347 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 551.7ms TimeCoverageRelationStatistics Valid=126, Invalid=996, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 17:46:06,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-08-21 17:46:06,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-08-21 17:46:06,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:06,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2021-08-21 17:46:06,348 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 23 [2021-08-21 17:46:06,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:06,349 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2021-08-21 17:46:06,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:06,349 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2021-08-21 17:46:06,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-08-21 17:46:06,349 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:06,349 INFO L512 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:06,379 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-08-21 17:46:06,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:06,561 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:06,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:06,561 INFO L82 PathProgramCache]: Analyzing trace with hash 2069360503, now seen corresponding path program 18 times [2021-08-21 17:46:06,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:06,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330702837] [2021-08-21 17:46:06,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:06,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:06,871 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:06,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:06,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330702837] [2021-08-21 17:46:06,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330702837] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:06,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662269377] [2021-08-21 17:46:06,872 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:46:06,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:06,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:06,873 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:06,875 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-08-21 17:46:07,397 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 17:46:07,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:07,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 17:46:07,399 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:07,712 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 17:46:07,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-21 17:46:07,722 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 17:46:07,757 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:07,757 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662269377] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:07,757 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:07,757 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-08-21 17:46:07,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1749581153] [2021-08-21 17:46:07,758 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-08-21 17:46:07,758 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:07,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-08-21 17:46:07,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=539, Unknown=0, NotChecked=0, Total=600 [2021-08-21 17:46:07,758 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:07,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:07,986 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2021-08-21 17:46:07,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 17:46:07,986 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-08-21 17:46:07,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:07,987 INFO L225 Difference]: With dead ends: 25 [2021-08-21 17:46:07,987 INFO L226 Difference]: Without dead ends: 25 [2021-08-21 17:46:07,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 393.6ms TimeCoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-08-21 17:46:07,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-08-21 17:46:07,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-08-21 17:46:07,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0833333333333333) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:07,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2021-08-21 17:46:07,988 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 23 [2021-08-21 17:46:07,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:07,988 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2021-08-21 17:46:07,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.32) internal successors, (33), 25 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:07,989 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2021-08-21 17:46:07,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 17:46:07,989 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:07,989 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:08,016 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-08-21 17:46:08,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:08,190 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:08,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:08,190 INFO L82 PathProgramCache]: Analyzing trace with hash -307591003, now seen corresponding path program 19 times [2021-08-21 17:46:08,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:08,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644416291] [2021-08-21 17:46:08,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:08,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:08,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:09,054 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:09,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:09,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644416291] [2021-08-21 17:46:09,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [644416291] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:09,055 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177457628] [2021-08-21 17:46:09,055 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:46:09,055 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:09,055 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:09,055 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:09,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-08-21 17:46:09,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:09,591 WARN L261 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 89 conjunts are in the unsatisfiable core [2021-08-21 17:46:09,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:12,158 INFO L354 Elim1Store]: treesize reduction 306, result has 1.0 percent of original size [2021-08-21 17:46:12,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 8 new quantified variables, introduced 28 case distinctions, treesize of input 140 treesize of output 107 [2021-08-21 17:46:12,165 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:46:12,165 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 62 treesize of output 53 [2021-08-21 17:46:12,246 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:12,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [177457628] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:12,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:12,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18] total 34 [2021-08-21 17:46:12,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833625789] [2021-08-21 17:46:12,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 17:46:12,246 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:12,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 17:46:12,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=1041, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 17:46:12,247 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 34 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:13,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:13,315 INFO L93 Difference]: Finished difference Result 44 states and 46 transitions. [2021-08-21 17:46:13,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 17:46:13,317 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 17:46:13,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:13,317 INFO L225 Difference]: With dead ends: 44 [2021-08-21 17:46:13,317 INFO L226 Difference]: Without dead ends: 41 [2021-08-21 17:46:13,318 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 1950.3ms TimeCoverageRelationStatistics Valid=150, Invalid=1656, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 17:46:13,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-21 17:46:13,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2021-08-21 17:46:13,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:13,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2021-08-21 17:46:13,320 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 24 [2021-08-21 17:46:13,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:13,320 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2021-08-21 17:46:13,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2941176470588236) internal successors, (44), 34 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:13,320 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2021-08-21 17:46:13,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:46:13,320 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:13,321 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:13,340 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-08-21 17:46:13,524 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,SelfDestructingSolverStorable21 [2021-08-21 17:46:13,525 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:13,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:13,525 INFO L82 PathProgramCache]: Analyzing trace with hash -978643657, now seen corresponding path program 20 times [2021-08-21 17:46:13,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:13,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830864612] [2021-08-21 17:46:13,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:13,526 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:13,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:13,844 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:13,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:13,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830864612] [2021-08-21 17:46:13,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1830864612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:13,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117735390] [2021-08-21 17:46:13,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:46:13,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:13,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:13,849 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:13,856 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-08-21 17:46:14,490 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:46:14,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:14,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 17:46:14,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:14,878 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-21 17:46:14,880 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-21 17:46:14,973 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 8 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:14,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117735390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:14,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:14,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-08-21 17:46:14,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478750411] [2021-08-21 17:46:14,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 17:46:14,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:14,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 17:46:14,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:46:14,975 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:15,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:15,431 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-08-21 17:46:15,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:46:15,431 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 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 25 [2021-08-21 17:46:15,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:15,432 INFO L225 Difference]: With dead ends: 35 [2021-08-21 17:46:15,432 INFO L226 Difference]: Without dead ends: 26 [2021-08-21 17:46:15,432 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 695.3ms TimeCoverageRelationStatistics Valid=142, Invalid=1264, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 17:46:15,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-08-21 17:46:15,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-08-21 17:46:15,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:15,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2021-08-21 17:46:15,433 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 25 [2021-08-21 17:46:15,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:15,434 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2021-08-21 17:46:15,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:15,434 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2021-08-21 17:46:15,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 17:46:15,434 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:15,434 INFO L512 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:15,454 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-08-21 17:46:15,636 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,SelfDestructingSolverStorable22 [2021-08-21 17:46:15,637 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:15,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:15,637 INFO L82 PathProgramCache]: Analyzing trace with hash 1833428409, now seen corresponding path program 21 times [2021-08-21 17:46:15,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:15,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [116631005] [2021-08-21 17:46:15,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:15,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:15,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:15,945 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:15,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:15,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [116631005] [2021-08-21 17:46:15,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [116631005] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:15,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206550008] [2021-08-21 17:46:15,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:46:15,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:15,946 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:15,953 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:15,954 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-08-21 17:46:16,664 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 17:46:16,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:16,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 17:46:16,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:17,017 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 17:46:17,019 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-21 17:46:17,023 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 17:46:17,061 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:17,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206550008] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:17,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:17,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-08-21 17:46:17,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987917409] [2021-08-21 17:46:17,061 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 17:46:17,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:17,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 17:46:17,062 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=687, Unknown=0, NotChecked=0, Total=756 [2021-08-21 17:46:17,062 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:17,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:17,276 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2021-08-21 17:46:17,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 17:46:17,276 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 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 25 [2021-08-21 17:46:17,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:17,276 INFO L225 Difference]: With dead ends: 27 [2021-08-21 17:46:17,276 INFO L226 Difference]: Without dead ends: 27 [2021-08-21 17:46:17,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 446.2ms TimeCoverageRelationStatistics Valid=80, Invalid=790, Unknown=0, NotChecked=0, Total=870 [2021-08-21 17:46:17,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-08-21 17:46:17,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-08-21 17:46:17,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0769230769230769) internal successors, (28), 26 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:17,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 28 transitions. [2021-08-21 17:46:17,278 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 28 transitions. Word has length 25 [2021-08-21 17:46:17,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:17,278 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 28 transitions. [2021-08-21 17:46:17,278 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.2857142857142858) internal successors, (36), 28 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:17,279 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 28 transitions. [2021-08-21 17:46:17,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 17:46:17,279 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:17,279 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:17,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-21 17:46:17,484 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:17,485 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:17,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:17,485 INFO L82 PathProgramCache]: Analyzing trace with hash 968448675, now seen corresponding path program 22 times [2021-08-21 17:46:17,485 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:17,485 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500153807] [2021-08-21 17:46:17,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:17,485 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:17,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:18,415 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:18,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:18,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500153807] [2021-08-21 17:46:18,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500153807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:18,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639437370] [2021-08-21 17:46:18,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:46:18,416 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:18,416 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:18,421 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:18,422 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-08-21 17:46:19,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:46:19,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:19,172 WARN L261 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 101 conjunts are in the unsatisfiable core [2021-08-21 17:46:19,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:22,214 INFO L354 Elim1Store]: treesize reduction 398, result has 0.7 percent of original size [2021-08-21 17:46:22,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 9 select indices, 9 select index equivalence classes, 0 disjoint index pairs (out of 36 index pairs), introduced 9 new quantified variables, introduced 36 case distinctions, treesize of input 151 treesize of output 114 [2021-08-21 17:46:22,246 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:46:22,246 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 62 treesize of output 53 [2021-08-21 17:46:22,354 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:22,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1639437370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:22,355 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:22,355 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 20] total 38 [2021-08-21 17:46:22,355 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087555611] [2021-08-21 17:46:22,355 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 17:46:22,355 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:22,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 17:46:22,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=1315, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 17:46:22,356 INFO L87 Difference]: Start difference. First operand 27 states and 28 transitions. Second operand has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 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) [2021-08-21 17:46:23,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:23,611 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2021-08-21 17:46:23,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 17:46:23,612 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 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 [2021-08-21 17:46:23,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:23,612 INFO L225 Difference]: With dead ends: 47 [2021-08-21 17:46:23,612 INFO L226 Difference]: Without dead ends: 44 [2021-08-21 17:46:23,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 2283.6ms TimeCoverageRelationStatistics Valid=168, Invalid=2088, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 17:46:23,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-21 17:46:23,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 30. [2021-08-21 17:46:23,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 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) [2021-08-21 17:46:23,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2021-08-21 17:46:23,615 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 26 [2021-08-21 17:46:23,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:23,615 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2021-08-21 17:46:23,615 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.263157894736842) internal successors, (48), 38 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) [2021-08-21 17:46:23,615 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2021-08-21 17:46:23,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 17:46:23,615 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:23,615 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:23,636 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-08-21 17:46:23,828 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:23,829 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:23,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:23,829 INFO L82 PathProgramCache]: Analyzing trace with hash -76119303, now seen corresponding path program 23 times [2021-08-21 17:46:23,829 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:23,829 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182932883] [2021-08-21 17:46:23,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:23,829 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:23,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:24,219 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:24,220 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:24,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182932883] [2021-08-21 17:46:24,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [182932883] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:24,220 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [269853109] [2021-08-21 17:46:24,220 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:46:24,220 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:24,220 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:24,221 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:24,243 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-08-21 17:46:25,043 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 17:46:25,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:25,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 17:46:25,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:25,548 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-21 17:46:25,550 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-21 17:46:25,604 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 9 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:25,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [269853109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:25,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:25,605 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2021-08-21 17:46:25,605 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762605978] [2021-08-21 17:46:25,605 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 17:46:25,605 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:25,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 17:46:25,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=853, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:46:25,606 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 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) [2021-08-21 17:46:26,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:26,080 INFO L93 Difference]: Finished difference Result 38 states and 39 transitions. [2021-08-21 17:46:26,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:46:26,080 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 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 27 [2021-08-21 17:46:26,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:26,081 INFO L225 Difference]: With dead ends: 38 [2021-08-21 17:46:26,081 INFO L226 Difference]: Without dead ends: 28 [2021-08-21 17:46:26,081 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 799.2ms TimeCoverageRelationStatistics Valid=158, Invalid=1564, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 17:46:26,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-08-21 17:46:26,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-08-21 17:46:26,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.0740740740740742) internal successors, (29), 27 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:26,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 29 transitions. [2021-08-21 17:46:26,083 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 29 transitions. Word has length 27 [2021-08-21 17:46:26,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:26,083 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 29 transitions. [2021-08-21 17:46:26,083 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 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) [2021-08-21 17:46:26,083 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 29 transitions. [2021-08-21 17:46:26,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-08-21 17:46:26,084 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:26,084 INFO L512 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:26,104 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-08-21 17:46:26,288 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,SelfDestructingSolverStorable25 [2021-08-21 17:46:26,289 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:26,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:26,294 INFO L82 PathProgramCache]: Analyzing trace with hash 1198768823, now seen corresponding path program 24 times [2021-08-21 17:46:26,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:26,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086882191] [2021-08-21 17:46:26,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:26,295 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:26,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:26,695 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:26,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:26,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086882191] [2021-08-21 17:46:26,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086882191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:26,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [666237923] [2021-08-21 17:46:26,695 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:46:26,695 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:26,696 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:26,697 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:26,698 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-08-21 17:46:27,586 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 17:46:27,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:27,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 17:46:27,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:28,008 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 17:46:28,011 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 17:46:28,015 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-21 17:46:28,055 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:28,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [666237923] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:28,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:28,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2021-08-21 17:46:28,055 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668391516] [2021-08-21 17:46:28,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-08-21 17:46:28,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:28,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-08-21 17:46:28,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=853, Unknown=0, NotChecked=0, Total=930 [2021-08-21 17:46:28,056 INFO L87 Difference]: Start difference. First operand 28 states and 29 transitions. Second operand has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 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) [2021-08-21 17:46:28,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:28,296 INFO L93 Difference]: Finished difference Result 29 states and 30 transitions. [2021-08-21 17:46:28,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 17:46:28,296 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 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 27 [2021-08-21 17:46:28,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:28,297 INFO L225 Difference]: With dead ends: 29 [2021-08-21 17:46:28,297 INFO L226 Difference]: Without dead ends: 29 [2021-08-21 17:46:28,297 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 557.7ms TimeCoverageRelationStatistics Valid=88, Invalid=968, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 17:46:28,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-08-21 17:46:28,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-08-21 17:46:28,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0714285714285714) internal successors, (30), 28 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:28,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 30 transitions. [2021-08-21 17:46:28,298 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 30 transitions. Word has length 27 [2021-08-21 17:46:28,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:28,298 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 30 transitions. [2021-08-21 17:46:28,298 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.2580645161290323) internal successors, (39), 31 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) [2021-08-21 17:46:28,298 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 30 transitions. [2021-08-21 17:46:28,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 17:46:28,299 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:28,299 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:28,318 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-21 17:46:28,499 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,SelfDestructingSolverStorable26 [2021-08-21 17:46:28,499 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:28,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:28,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1526129307, now seen corresponding path program 25 times [2021-08-21 17:46:28,500 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:28,500 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278369103] [2021-08-21 17:46:28,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:28,500 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:28,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:29,374 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:29,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:29,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278369103] [2021-08-21 17:46:29,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278369103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:29,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609918409] [2021-08-21 17:46:29,375 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:46:29,375 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:29,375 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:29,376 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:29,376 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-08-21 17:46:30,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:30,240 WARN L261 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 113 conjunts are in the unsatisfiable core [2021-08-21 17:46:30,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:34,170 INFO L354 Elim1Store]: treesize reduction 502, result has 0.6 percent of original size [2021-08-21 17:46:34,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 10 select indices, 10 select index equivalence classes, 0 disjoint index pairs (out of 45 index pairs), introduced 10 new quantified variables, introduced 45 case distinctions, treesize of input 162 treesize of output 121 [2021-08-21 17:46:34,177 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:46:34,177 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 62 treesize of output 53 [2021-08-21 17:46:34,246 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:34,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [609918409] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:34,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:34,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 41 [2021-08-21 17:46:34,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691645925] [2021-08-21 17:46:34,246 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 17:46:34,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:34,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 17:46:34,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=1542, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 17:46:34,247 INFO L87 Difference]: Start difference. First operand 29 states and 30 transitions. Second operand has 41 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 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) [2021-08-21 17:46:35,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:35,473 INFO L93 Difference]: Finished difference Result 50 states and 52 transitions. [2021-08-21 17:46:35,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 17:46:35,474 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 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 28 [2021-08-21 17:46:35,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:35,474 INFO L225 Difference]: With dead ends: 50 [2021-08-21 17:46:35,474 INFO L226 Difference]: Without dead ends: 47 [2021-08-21 17:46:35,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 2539.8ms TimeCoverageRelationStatistics Valid=182, Invalid=2470, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 17:46:35,475 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-08-21 17:46:35,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 32. [2021-08-21 17:46:35,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.096774193548387) internal successors, (34), 31 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:35,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2021-08-21 17:46:35,476 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 28 [2021-08-21 17:46:35,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:35,476 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2021-08-21 17:46:35,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.170731707317073) internal successors, (48), 41 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) [2021-08-21 17:46:35,477 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2021-08-21 17:46:35,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 17:46:35,477 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:35,477 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:35,498 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-08-21 17:46:35,684 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,SelfDestructingSolverStorable27 [2021-08-21 17:46:35,685 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:35,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:35,685 INFO L82 PathProgramCache]: Analyzing trace with hash -98625417, now seen corresponding path program 26 times [2021-08-21 17:46:35,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:35,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391406201] [2021-08-21 17:46:35,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:35,686 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:35,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:36,068 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:36,068 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:36,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391406201] [2021-08-21 17:46:36,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391406201] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:36,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789059233] [2021-08-21 17:46:36,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:46:36,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:36,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:36,070 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:36,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-08-21 17:46:37,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:46:37,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:37,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 17:46:37,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:37,598 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-21 17:46:37,600 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-21 17:46:37,668 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 10 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:37,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789059233] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:37,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:37,668 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2021-08-21 17:46:37,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893876334] [2021-08-21 17:46:37,669 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 17:46:37,669 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:37,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 17:46:37,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1037, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 17:46:37,670 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:38,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:38,228 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-08-21 17:46:38,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:46:38,228 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 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 29 [2021-08-21 17:46:38,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:38,228 INFO L225 Difference]: With dead ends: 41 [2021-08-21 17:46:38,228 INFO L226 Difference]: Without dead ends: 30 [2021-08-21 17:46:38,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 908.9ms TimeCoverageRelationStatistics Valid=174, Invalid=1896, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 17:46:38,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-08-21 17:46:38,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-08-21 17:46:38,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:38,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2021-08-21 17:46:38,231 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 29 [2021-08-21 17:46:38,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:38,231 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2021-08-21 17:46:38,231 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:38,231 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2021-08-21 17:46:38,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-08-21 17:46:38,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:38,232 INFO L512 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:38,259 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 17:46:38,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 17:46:38,457 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:38,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:38,457 INFO L82 PathProgramCache]: Analyzing trace with hash 768200825, now seen corresponding path program 27 times [2021-08-21 17:46:38,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:38,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405187368] [2021-08-21 17:46:38,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:38,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:38,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:38,916 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:38,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:38,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405187368] [2021-08-21 17:46:38,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405187368] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:38,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232620988] [2021-08-21 17:46:38,916 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:46:38,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:38,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:38,921 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:38,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-08-21 17:46:39,953 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 17:46:39,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:39,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 17:46:39,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:40,415 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 17:46:40,418 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 17:46:40,422 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-21 17:46:40,465 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:40,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232620988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:40,465 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:40,465 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2021-08-21 17:46:40,466 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194248832] [2021-08-21 17:46:40,466 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-08-21 17:46:40,466 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:40,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-08-21 17:46:40,466 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=1037, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 17:46:40,467 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:40,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:40,741 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2021-08-21 17:46:40,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 17:46:40,742 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 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 29 [2021-08-21 17:46:40,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:40,742 INFO L225 Difference]: With dead ends: 31 [2021-08-21 17:46:40,742 INFO L226 Difference]: Without dead ends: 31 [2021-08-21 17:46:40,742 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 663.2ms TimeCoverageRelationStatistics Valid=96, Invalid=1164, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 17:46:40,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-08-21 17:46:40,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-08-21 17:46:40,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0666666666666667) internal successors, (32), 30 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) [2021-08-21 17:46:40,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2021-08-21 17:46:40,744 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 29 [2021-08-21 17:46:40,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:40,744 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2021-08-21 17:46:40,744 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.2352941176470589) internal successors, (42), 34 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:40,744 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2021-08-21 17:46:40,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 17:46:40,745 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:40,745 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:40,765 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 17:46:40,952 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:40,953 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:40,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:40,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1988835357, now seen corresponding path program 28 times [2021-08-21 17:46:40,953 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:40,953 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29586507] [2021-08-21 17:46:40,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:40,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:40,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:41,905 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:41,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:41,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29586507] [2021-08-21 17:46:41,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29586507] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:41,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080305696] [2021-08-21 17:46:41,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:46:41,905 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:41,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:41,910 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:41,911 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-08-21 17:46:42,961 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:46:42,961 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:42,963 WARN L261 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 125 conjunts are in the unsatisfiable core [2021-08-21 17:46:42,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:47,442 INFO L354 Elim1Store]: treesize reduction 618, result has 0.5 percent of original size [2021-08-21 17:46:47,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 11 select indices, 11 select index equivalence classes, 0 disjoint index pairs (out of 55 index pairs), introduced 11 new quantified variables, introduced 55 case distinctions, treesize of input 173 treesize of output 128 [2021-08-21 17:46:47,449 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:46:47,449 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 62 treesize of output 53 [2021-08-21 17:46:47,503 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:47,503 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080305696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:47,503 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:47,503 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 24] total 45 [2021-08-21 17:46:47,504 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033065905] [2021-08-21 17:46:47,504 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-21 17:46:47,504 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:47,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-21 17:46:47,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=1872, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 17:46:47,505 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 45 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:49,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:49,156 INFO L93 Difference]: Finished difference Result 53 states and 55 transitions. [2021-08-21 17:46:49,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 17:46:49,156 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 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 [2021-08-21 17:46:49,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:49,157 INFO L225 Difference]: With dead ends: 53 [2021-08-21 17:46:49,157 INFO L226 Difference]: Without dead ends: 50 [2021-08-21 17:46:49,157 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 494 ImplicationChecksByTransitivity, 3001.9ms TimeCoverageRelationStatistics Valid=200, Invalid=2992, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 17:46:49,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-21 17:46:49,158 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 34. [2021-08-21 17:46:49,158 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:49,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2021-08-21 17:46:49,158 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 30 [2021-08-21 17:46:49,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:49,159 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2021-08-21 17:46:49,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:49,159 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2021-08-21 17:46:49,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 17:46:49,159 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:49,159 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:49,179 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-08-21 17:46:49,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:49,361 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:49,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:49,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1557611079, now seen corresponding path program 29 times [2021-08-21 17:46:49,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:49,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2893649] [2021-08-21 17:46:49,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:49,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:49,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:49,794 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:49,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:49,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2893649] [2021-08-21 17:46:49,794 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2893649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:49,794 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274112116] [2021-08-21 17:46:49,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:46:49,794 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:49,794 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:49,797 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:49,798 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-08-21 17:46:50,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-08-21 17:46:50,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:50,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 17:46:50,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:51,574 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-21 17:46:51,578 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-21 17:46:51,636 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 11 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:51,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274112116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:51,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:51,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2021-08-21 17:46:51,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2044123164] [2021-08-21 17:46:51,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 17:46:51,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:51,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 17:46:51,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1239, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 17:46:51,638 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:52,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:52,278 INFO L93 Difference]: Finished difference Result 44 states and 45 transitions. [2021-08-21 17:46:52,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 17:46:52,278 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 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 31 [2021-08-21 17:46:52,278 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:52,278 INFO L225 Difference]: With dead ends: 44 [2021-08-21 17:46:52,279 INFO L226 Difference]: Without dead ends: 32 [2021-08-21 17:46:52,279 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 1004.8ms TimeCoverageRelationStatistics Valid=190, Invalid=2260, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 17:46:52,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-08-21 17:46:52,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-08-21 17:46:52,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:52,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2021-08-21 17:46:52,281 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 31 [2021-08-21 17:46:52,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:52,281 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2021-08-21 17:46:52,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:52,281 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2021-08-21 17:46:52,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 17:46:52,281 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:52,281 INFO L512 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:52,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2021-08-21 17:46:52,481 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,SelfDestructingSolverStorable31 [2021-08-21 17:46:52,482 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:52,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:52,482 INFO L82 PathProgramCache]: Analyzing trace with hash -455801353, now seen corresponding path program 30 times [2021-08-21 17:46:52,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:52,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [50575987] [2021-08-21 17:46:52,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:52,482 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:52,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:52,976 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:52,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:52,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [50575987] [2021-08-21 17:46:52,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [50575987] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:52,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585843777] [2021-08-21 17:46:52,977 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:46:52,977 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:52,977 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:52,978 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:52,979 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-08-21 17:46:54,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-08-21 17:46:54,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:46:54,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 17:46:54,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:46:54,754 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 17:46:54,758 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 17:46:54,762 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-21 17:46:54,805 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:54,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585843777] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:54,805 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:46:54,805 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2021-08-21 17:46:54,805 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480014634] [2021-08-21 17:46:54,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 17:46:54,806 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:46:54,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 17:46:54,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=1239, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 17:46:54,807 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:55,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:46:55,135 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2021-08-21 17:46:55,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 17:46:55,135 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 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 31 [2021-08-21 17:46:55,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:46:55,135 INFO L225 Difference]: With dead ends: 33 [2021-08-21 17:46:55,135 INFO L226 Difference]: Without dead ends: 33 [2021-08-21 17:46:55,136 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 736.8ms TimeCoverageRelationStatistics Valid=104, Invalid=1378, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 17:46:55,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-08-21 17:46:55,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-08-21 17:46:55,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.0625) internal successors, (34), 32 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:55,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 34 transitions. [2021-08-21 17:46:55,138 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 34 transitions. Word has length 31 [2021-08-21 17:46:55,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:46:55,138 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 34 transitions. [2021-08-21 17:46:55,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.2162162162162162) internal successors, (45), 37 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:46:55,138 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 34 transitions. [2021-08-21 17:46:55,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-08-21 17:46:55,138 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:46:55,139 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:46:55,159 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2021-08-21 17:46:55,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:55,341 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:46:55,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:46:55,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1278197211, now seen corresponding path program 31 times [2021-08-21 17:46:55,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:46:55,341 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846474255] [2021-08-21 17:46:55,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:46:55,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:46:55,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:56,788 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:46:56,788 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:46:56,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846474255] [2021-08-21 17:46:56,789 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846474255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:46:56,789 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611727299] [2021-08-21 17:46:56,789 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:46:56,789 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:46:56,789 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:46:56,790 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:46:56,790 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-08-21 17:46:58,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:46:58,079 WARN L261 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 137 conjunts are in the unsatisfiable core [2021-08-21 17:46:58,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:03,733 INFO L354 Elim1Store]: treesize reduction 746, result has 0.4 percent of original size [2021-08-21 17:47:03,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 12 select indices, 12 select index equivalence classes, 0 disjoint index pairs (out of 66 index pairs), introduced 12 new quantified variables, introduced 66 case distinctions, treesize of input 184 treesize of output 135 [2021-08-21 17:47:03,740 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:47:03,740 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 62 treesize of output 53 [2021-08-21 17:47:03,810 INFO L134 CoverageAnalysis]: Checked inductivity of 132 backedges. 0 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:03,811 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611727299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:03,811 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:03,811 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26] total 49 [2021-08-21 17:47:03,811 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209978489] [2021-08-21 17:47:03,811 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-21 17:47:03,811 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:03,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-21 17:47:03,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=2234, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 17:47:03,812 INFO L87 Difference]: Start difference. First operand 33 states and 34 transitions. Second operand has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 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) [2021-08-21 17:47:06,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:06,125 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2021-08-21 17:47:06,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 17:47:06,125 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 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 32 [2021-08-21 17:47:06,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:06,126 INFO L225 Difference]: With dead ends: 56 [2021-08-21 17:47:06,126 INFO L226 Difference]: Without dead ends: 53 [2021-08-21 17:47:06,126 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 3923.8ms TimeCoverageRelationStatistics Valid=218, Invalid=3564, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 17:47:06,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-21 17:47:06,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 36. [2021-08-21 17:47:06,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) internal successors, (38), 35 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) [2021-08-21 17:47:06,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2021-08-21 17:47:06,128 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 32 [2021-08-21 17:47:06,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:06,128 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2021-08-21 17:47:06,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.1428571428571428) internal successors, (56), 49 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) [2021-08-21 17:47:06,128 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2021-08-21 17:47:06,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:47:06,129 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:06,129 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:06,150 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-21 17:47:06,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:06,333 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:06,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:06,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1002665033, now seen corresponding path program 32 times [2021-08-21 17:47:06,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:06,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938487484] [2021-08-21 17:47:06,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:06,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:06,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:06,913 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:06,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:06,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938487484] [2021-08-21 17:47:06,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938487484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:06,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101977069] [2021-08-21 17:47:06,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:47:06,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:06,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:06,915 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:06,916 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-08-21 17:47:08,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:47:08,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:08,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-21 17:47:08,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:09,030 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-21 17:47:09,032 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-21 17:47:09,090 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 12 proven. 132 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:09,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101977069] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:09,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:09,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2021-08-21 17:47:09,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825068561] [2021-08-21 17:47:09,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 17:47:09,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:09,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 17:47:09,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1459, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 17:47:09,092 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 40 states, 40 states have (on average 1.2) internal successors, (48), 40 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) [2021-08-21 17:47:09,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:09,826 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-08-21 17:47:09,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 17:47:09,827 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.2) internal successors, (48), 40 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 33 [2021-08-21 17:47:09,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:09,827 INFO L225 Difference]: With dead ends: 47 [2021-08-21 17:47:09,827 INFO L226 Difference]: Without dead ends: 34 [2021-08-21 17:47:09,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 1236.1ms TimeCoverageRelationStatistics Valid=206, Invalid=2656, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 17:47:09,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-08-21 17:47:09,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-08-21 17:47:09,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0606060606060606) internal successors, (35), 33 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:09,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 35 transitions. [2021-08-21 17:47:09,829 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 35 transitions. Word has length 33 [2021-08-21 17:47:09,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:09,829 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 35 transitions. [2021-08-21 17:47:09,829 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.2) internal successors, (48), 40 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) [2021-08-21 17:47:09,829 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 35 transitions. [2021-08-21 17:47:09,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-08-21 17:47:09,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:09,829 INFO L512 BasicCegarLoop]: trace histogram [12, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:09,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 17:47:10,029 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,SelfDestructingSolverStorable34 [2021-08-21 17:47:10,030 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:10,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:10,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1206301895, now seen corresponding path program 33 times [2021-08-21 17:47:10,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:10,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777367660] [2021-08-21 17:47:10,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:10,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:10,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:10,602 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:10,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:10,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777367660] [2021-08-21 17:47:10,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777367660] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:10,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266279349] [2021-08-21 17:47:10,603 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:47:10,603 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:10,603 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:10,604 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:10,605 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 17:47:12,148 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 17:47:12,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:12,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-21 17:47:12,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:12,778 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 17:47:12,781 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 17:47:12,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-21 17:47:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:12,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266279349] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:12,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:12,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2021-08-21 17:47:12,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904640821] [2021-08-21 17:47:12,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 17:47:12,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:12,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 17:47:12,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1459, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 17:47:12,833 INFO L87 Difference]: Start difference. First operand 34 states and 35 transitions. Second operand has 40 states, 40 states have (on average 1.2) internal successors, (48), 40 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) [2021-08-21 17:47:13,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:13,260 INFO L93 Difference]: Finished difference Result 35 states and 36 transitions. [2021-08-21 17:47:13,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 17:47:13,260 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.2) internal successors, (48), 40 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 33 [2021-08-21 17:47:13,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:13,261 INFO L225 Difference]: With dead ends: 35 [2021-08-21 17:47:13,261 INFO L226 Difference]: Without dead ends: 35 [2021-08-21 17:47:13,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 875.8ms TimeCoverageRelationStatistics Valid=112, Invalid=1610, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 17:47:13,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-08-21 17:47:13,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-08-21 17:47:13,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0588235294117647) internal successors, (36), 34 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:13,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 36 transitions. [2021-08-21 17:47:13,262 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 36 transitions. Word has length 33 [2021-08-21 17:47:13,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:13,262 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 36 transitions. [2021-08-21 17:47:13,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.2) internal successors, (48), 40 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) [2021-08-21 17:47:13,263 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 36 transitions. [2021-08-21 17:47:13,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 17:47:13,263 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:13,263 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:13,288 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 17:47:13,465 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,SelfDestructingSolverStorable35 [2021-08-21 17:47:13,465 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:13,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:13,465 INFO L82 PathProgramCache]: Analyzing trace with hash 1226089763, now seen corresponding path program 34 times [2021-08-21 17:47:13,465 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:13,465 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516427305] [2021-08-21 17:47:13,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:13,466 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:13,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:14,764 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:14,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:14,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516427305] [2021-08-21 17:47:14,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516427305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:14,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [514318608] [2021-08-21 17:47:14,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:47:14,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:14,764 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:14,765 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:14,766 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-08-21 17:47:16,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:47:16,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:16,300 WARN L261 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 149 conjunts are in the unsatisfiable core [2021-08-21 17:47:16,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:23,006 INFO L354 Elim1Store]: treesize reduction 886, result has 0.3 percent of original size [2021-08-21 17:47:23,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 13 select indices, 13 select index equivalence classes, 0 disjoint index pairs (out of 78 index pairs), introduced 13 new quantified variables, introduced 78 case distinctions, treesize of input 195 treesize of output 142 [2021-08-21 17:47:23,014 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:47:23,014 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 62 treesize of output 53 [2021-08-21 17:47:23,114 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:23,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [514318608] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:23,115 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:23,115 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 54 [2021-08-21 17:47:23,115 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [368795949] [2021-08-21 17:47:23,115 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-21 17:47:23,115 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:23,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-21 17:47:23,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=2731, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 17:47:23,116 INFO L87 Difference]: Start difference. First operand 35 states and 36 transitions. Second operand has 54 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:26,094 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:26,094 INFO L93 Difference]: Finished difference Result 59 states and 61 transitions. [2021-08-21 17:47:26,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 17:47:26,094 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 17:47:26,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:26,095 INFO L225 Difference]: With dead ends: 59 [2021-08-21 17:47:26,095 INFO L226 Difference]: Without dead ends: 56 [2021-08-21 17:47:26,095 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 739 ImplicationChecksByTransitivity, 4954.3ms TimeCoverageRelationStatistics Valid=240, Invalid=4316, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 17:47:26,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-21 17:47:26,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 38. [2021-08-21 17:47:26,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.0810810810810811) internal successors, (40), 37 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) [2021-08-21 17:47:26,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2021-08-21 17:47:26,096 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 34 [2021-08-21 17:47:26,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:26,096 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2021-08-21 17:47:26,096 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.1851851851851851) internal successors, (64), 54 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:26,096 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2021-08-21 17:47:26,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 17:47:26,097 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:26,097 INFO L512 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:26,119 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-08-21 17:47:26,300 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,SelfDestructingSolverStorable36 [2021-08-21 17:47:26,301 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:26,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:26,301 INFO L82 PathProgramCache]: Analyzing trace with hash -679180167, now seen corresponding path program 35 times [2021-08-21 17:47:26,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:26,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356244886] [2021-08-21 17:47:26,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:26,301 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:26,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:26,868 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:26,868 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:26,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356244886] [2021-08-21 17:47:26,868 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356244886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:26,868 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560148070] [2021-08-21 17:47:26,868 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:47:26,868 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:26,868 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:26,869 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:26,869 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-08-21 17:47:28,603 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 17:47:28,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:28,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 17:47:28,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:29,362 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-21 17:47:29,364 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-21 17:47:29,429 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 13 proven. 156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:29,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560148070] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:29,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:29,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 43 [2021-08-21 17:47:29,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1183066982] [2021-08-21 17:47:29,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 17:47:29,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:29,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 17:47:29,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1697, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 17:47:29,430 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 43 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:30,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:30,254 INFO L93 Difference]: Finished difference Result 50 states and 51 transitions. [2021-08-21 17:47:30,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 17:47:30,255 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 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 35 [2021-08-21 17:47:30,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:30,255 INFO L225 Difference]: With dead ends: 50 [2021-08-21 17:47:30,255 INFO L226 Difference]: Without dead ends: 36 [2021-08-21 17:47:30,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1321.3ms TimeCoverageRelationStatistics Valid=222, Invalid=3084, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 17:47:30,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-08-21 17:47:30,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-08-21 17:47:30,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:30,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2021-08-21 17:47:30,257 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 35 [2021-08-21 17:47:30,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:30,257 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2021-08-21 17:47:30,257 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:30,257 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2021-08-21 17:47:30,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-08-21 17:47:30,257 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:30,257 INFO L512 BasicCegarLoop]: trace histogram [13, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:30,279 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-08-21 17:47:30,457 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:30,458 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:30,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:30,458 INFO L82 PathProgramCache]: Analyzing trace with hash 1598011703, now seen corresponding path program 36 times [2021-08-21 17:47:30,458 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:30,458 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480890012] [2021-08-21 17:47:30,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:30,458 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:30,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:31,073 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:31,073 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:31,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480890012] [2021-08-21 17:47:31,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1480890012] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:31,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618608351] [2021-08-21 17:47:31,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:47:31,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:31,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:31,075 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:31,076 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-08-21 17:47:32,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 17:47:32,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:32,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 17:47:32,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:33,485 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 17:47:33,487 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 17:47:33,497 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-21 17:47:33,545 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:33,545 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618608351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:33,545 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:33,545 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 43 [2021-08-21 17:47:33,545 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906680621] [2021-08-21 17:47:33,546 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 17:47:33,546 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:33,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 17:47:33,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=1697, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 17:47:33,546 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 43 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:33,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:33,995 INFO L93 Difference]: Finished difference Result 37 states and 38 transitions. [2021-08-21 17:47:33,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 17:47:33,996 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 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 35 [2021-08-21 17:47:33,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:33,996 INFO L225 Difference]: With dead ends: 37 [2021-08-21 17:47:33,996 INFO L226 Difference]: Without dead ends: 37 [2021-08-21 17:47:33,996 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 971.9ms TimeCoverageRelationStatistics Valid=120, Invalid=1860, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 17:47:33,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-08-21 17:47:33,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-08-21 17:47:33,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0555555555555556) internal successors, (38), 36 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) [2021-08-21 17:47:33,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 38 transitions. [2021-08-21 17:47:33,997 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 38 transitions. Word has length 35 [2021-08-21 17:47:33,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:33,997 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 38 transitions. [2021-08-21 17:47:33,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.186046511627907) internal successors, (51), 43 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:33,997 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 38 transitions. [2021-08-21 17:47:33,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-08-21 17:47:33,998 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:33,998 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:34,023 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-08-21 17:47:34,205 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,SelfDestructingSolverStorable38 [2021-08-21 17:47:34,205 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:34,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:34,206 INFO L82 PathProgramCache]: Analyzing trace with hash -2034501915, now seen corresponding path program 37 times [2021-08-21 17:47:34,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:34,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988315676] [2021-08-21 17:47:34,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:34,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:34,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:35,817 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:35,817 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:35,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988315676] [2021-08-21 17:47:35,817 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988315676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:35,817 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719338118] [2021-08-21 17:47:35,817 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:47:35,817 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:35,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:35,818 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:35,819 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-08-21 17:47:37,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:37,582 WARN L261 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 161 conjunts are in the unsatisfiable core [2021-08-21 17:47:37,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:45,511 INFO L354 Elim1Store]: treesize reduction 1038, result has 0.3 percent of original size [2021-08-21 17:47:45,512 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 14 select indices, 14 select index equivalence classes, 0 disjoint index pairs (out of 91 index pairs), introduced 14 new quantified variables, introduced 91 case distinctions, treesize of input 206 treesize of output 149 [2021-08-21 17:47:45,520 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:47:45,520 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 62 treesize of output 53 [2021-08-21 17:47:45,639 INFO L134 CoverageAnalysis]: Checked inductivity of 182 backedges. 0 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:45,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719338118] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:45,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:45,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 30] total 58 [2021-08-21 17:47:45,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106760810] [2021-08-21 17:47:45,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-08-21 17:47:45,640 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:45,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-08-21 17:47:45,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=3178, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 17:47:45,641 INFO L87 Difference]: Start difference. First operand 37 states and 38 transitions. Second operand has 58 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 58 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:48,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:48,836 INFO L93 Difference]: Finished difference Result 62 states and 64 transitions. [2021-08-21 17:47:48,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 17:47:48,836 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 58 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-08-21 17:47:48,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:48,837 INFO L225 Difference]: With dead ends: 62 [2021-08-21 17:47:48,837 INFO L226 Difference]: Without dead ends: 59 [2021-08-21 17:47:48,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 586 ImplicationChecksByTransitivity, 5707.2ms TimeCoverageRelationStatistics Valid=245, Invalid=5011, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 17:47:48,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-21 17:47:48,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 40. [2021-08-21 17:47:48,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) internal successors, (42), 39 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:48,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2021-08-21 17:47:48,839 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 36 [2021-08-21 17:47:48,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:48,839 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2021-08-21 17:47:48,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 58 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:48,839 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2021-08-21 17:47:48,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 17:47:48,839 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:48,839 INFO L512 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:48,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-08-21 17:47:49,040 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,SelfDestructingSolverStorable39 [2021-08-21 17:47:49,041 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:49,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:49,041 INFO L82 PathProgramCache]: Analyzing trace with hash 1321692919, now seen corresponding path program 38 times [2021-08-21 17:47:49,041 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:49,041 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058116773] [2021-08-21 17:47:49,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:49,041 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:49,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:49,699 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:49,700 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:49,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058116773] [2021-08-21 17:47:49,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058116773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:49,700 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981272308] [2021-08-21 17:47:49,700 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:47:49,700 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:49,700 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:49,701 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:49,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-08-21 17:47:51,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:47:51,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:51,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 62 conjunts are in the unsatisfiable core [2021-08-21 17:47:51,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:52,487 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-21 17:47:52,489 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-21 17:47:52,561 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:52,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981272308] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:52,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:52,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2021-08-21 17:47:52,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1147581198] [2021-08-21 17:47:52,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-21 17:47:52,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:52,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-21 17:47:52,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1953, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 17:47:52,563 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 46 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:53,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:53,480 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-08-21 17:47:53,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 17:47:53,481 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 17:47:53,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:53,481 INFO L225 Difference]: With dead ends: 53 [2021-08-21 17:47:53,481 INFO L226 Difference]: Without dead ends: 38 [2021-08-21 17:47:53,481 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 1495.1ms TimeCoverageRelationStatistics Valid=238, Invalid=3544, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 17:47:53,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-08-21 17:47:53,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-08-21 17:47:53,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 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) [2021-08-21 17:47:53,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2021-08-21 17:47:53,482 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 37 [2021-08-21 17:47:53,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:53,482 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2021-08-21 17:47:53,482 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:53,482 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2021-08-21 17:47:53,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 17:47:53,483 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:53,483 INFO L512 BasicCegarLoop]: trace histogram [14, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:53,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-08-21 17:47:53,683 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:53,683 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:53,686 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:53,686 INFO L82 PathProgramCache]: Analyzing trace with hash -1099803143, now seen corresponding path program 39 times [2021-08-21 17:47:53,686 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:53,686 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089127934] [2021-08-21 17:47:53,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:53,687 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:53,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:54,311 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:54,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:54,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089127934] [2021-08-21 17:47:54,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089127934] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:54,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491179721] [2021-08-21 17:47:54,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:47:54,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:54,312 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:54,313 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:54,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-08-21 17:47:56,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-08-21 17:47:56,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:47:56,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 62 conjunts are in the unsatisfiable core [2021-08-21 17:47:56,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:47:57,107 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 17:47:57,111 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-21 17:47:57,115 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 17:47:57,163 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:57,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1491179721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:57,163 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:47:57,163 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2021-08-21 17:47:57,163 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550968178] [2021-08-21 17:47:57,163 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-21 17:47:57,163 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:47:57,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-21 17:47:57,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=1953, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 17:47:57,164 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 46 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:57,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:47:57,660 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2021-08-21 17:47:57,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 17:47:57,661 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 17:47:57,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:47:57,661 INFO L225 Difference]: With dead ends: 39 [2021-08-21 17:47:57,661 INFO L226 Difference]: Without dead ends: 39 [2021-08-21 17:47:57,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1020.6ms TimeCoverageRelationStatistics Valid=128, Invalid=2128, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 17:47:57,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-08-21 17:47:57,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-08-21 17:47:57,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0526315789473684) internal successors, (40), 38 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) [2021-08-21 17:47:57,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 40 transitions. [2021-08-21 17:47:57,663 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 40 transitions. Word has length 37 [2021-08-21 17:47:57,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:47:57,663 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 40 transitions. [2021-08-21 17:47:57,663 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.173913043478261) internal successors, (54), 46 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:47:57,663 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 40 transitions. [2021-08-21 17:47:57,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-08-21 17:47:57,663 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:47:57,663 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:47:57,688 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-08-21 17:47:57,868 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,SelfDestructingSolverStorable41 [2021-08-21 17:47:57,870 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:47:57,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:47:57,871 INFO L82 PathProgramCache]: Analyzing trace with hash 232583779, now seen corresponding path program 40 times [2021-08-21 17:47:57,871 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:47:57,871 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1768869535] [2021-08-21 17:47:57,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:47:57,871 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:47:57,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:47:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:47:59,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:47:59,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1768869535] [2021-08-21 17:47:59,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1768869535] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:47:59,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1341221815] [2021-08-21 17:47:59,284 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:47:59,284 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:47:59,284 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:47:59,285 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:47:59,285 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-08-21 17:48:01,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:48:01,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:01,346 WARN L261 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 173 conjunts are in the unsatisfiable core [2021-08-21 17:48:01,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:09,717 INFO L354 Elim1Store]: treesize reduction 1202, result has 0.2 percent of original size [2021-08-21 17:48:09,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 15 select indices, 15 select index equivalence classes, 0 disjoint index pairs (out of 105 index pairs), introduced 15 new quantified variables, introduced 105 case distinctions, treesize of input 217 treesize of output 156 [2021-08-21 17:48:09,725 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:48:09,725 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 62 treesize of output 53 [2021-08-21 17:48:09,767 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:09,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1341221815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:09,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:09,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 61 [2021-08-21 17:48:09,767 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232755327] [2021-08-21 17:48:09,767 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-08-21 17:48:09,767 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:09,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-08-21 17:48:09,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=3512, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 17:48:09,768 INFO L87 Difference]: Start difference. First operand 39 states and 40 transitions. Second operand has 61 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:13,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:13,902 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2021-08-21 17:48:13,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 17:48:13,902 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-08-21 17:48:13,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:13,902 INFO L225 Difference]: With dead ends: 65 [2021-08-21 17:48:13,902 INFO L226 Difference]: Without dead ends: 62 [2021-08-21 17:48:13,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 944 ImplicationChecksByTransitivity, 6452.8ms TimeCoverageRelationStatistics Valid=272, Invalid=5580, Unknown=0, NotChecked=0, Total=5852 [2021-08-21 17:48:13,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-21 17:48:13,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 42. [2021-08-21 17:48:13,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:13,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2021-08-21 17:48:13,904 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 38 [2021-08-21 17:48:13,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:13,905 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2021-08-21 17:48:13,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.1147540983606556) internal successors, (68), 61 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:13,905 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2021-08-21 17:48:13,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 17:48:13,905 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:13,905 INFO L512 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:13,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-08-21 17:48:14,132 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:14,133 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:14,133 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:14,133 INFO L82 PathProgramCache]: Analyzing trace with hash -1413094599, now seen corresponding path program 41 times [2021-08-21 17:48:14,133 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:14,133 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467127278] [2021-08-21 17:48:14,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:14,133 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:14,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:14,846 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:14,847 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:14,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467127278] [2021-08-21 17:48:14,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467127278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:14,847 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [25484079] [2021-08-21 17:48:14,847 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:48:14,847 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:14,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:14,848 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:14,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-08-21 17:48:17,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-21 17:48:17,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:17,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-21 17:48:17,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:18,034 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-21 17:48:18,035 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-21 17:48:18,099 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 15 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:18,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [25484079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:18,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:18,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2021-08-21 17:48:18,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165589394] [2021-08-21 17:48:18,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-21 17:48:18,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:18,100 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-21 17:48:18,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2227, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 17:48:18,101 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 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) [2021-08-21 17:48:19,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:19,101 INFO L93 Difference]: Finished difference Result 56 states and 57 transitions. [2021-08-21 17:48:19,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 17:48:19,102 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 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 39 [2021-08-21 17:48:19,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:19,102 INFO L225 Difference]: With dead ends: 56 [2021-08-21 17:48:19,102 INFO L226 Difference]: Without dead ends: 40 [2021-08-21 17:48:19,103 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1664.3ms TimeCoverageRelationStatistics Valid=254, Invalid=4036, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 17:48:19,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-08-21 17:48:19,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-08-21 17:48:19,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0512820512820513) internal successors, (41), 39 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:19,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 41 transitions. [2021-08-21 17:48:19,104 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 41 transitions. Word has length 39 [2021-08-21 17:48:19,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:19,104 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 41 transitions. [2021-08-21 17:48:19,104 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 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) [2021-08-21 17:48:19,104 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 41 transitions. [2021-08-21 17:48:19,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-08-21 17:48:19,104 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:19,104 INFO L512 BasicCegarLoop]: trace histogram [15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:19,130 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-21 17:48:19,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:19,305 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:19,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:19,305 INFO L82 PathProgramCache]: Analyzing trace with hash 829938807, now seen corresponding path program 42 times [2021-08-21 17:48:19,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:19,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391643103] [2021-08-21 17:48:19,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:19,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:19,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:20,054 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:20,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391643103] [2021-08-21 17:48:20,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391643103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:20,054 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508344724] [2021-08-21 17:48:20,054 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:48:20,054 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:20,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:20,055 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:20,056 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-08-21 17:48:22,432 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-21 17:48:22,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:22,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-21 17:48:22,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:23,269 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 17:48:23,271 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-21 17:48:23,275 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 17:48:23,328 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:23,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508344724] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:23,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:23,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2021-08-21 17:48:23,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1311668386] [2021-08-21 17:48:23,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-21 17:48:23,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:23,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-21 17:48:23,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=2227, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 17:48:23,329 INFO L87 Difference]: Start difference. First operand 40 states and 41 transitions. Second operand has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 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) [2021-08-21 17:48:23,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:23,933 INFO L93 Difference]: Finished difference Result 41 states and 42 transitions. [2021-08-21 17:48:23,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 17:48:23,934 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 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 39 [2021-08-21 17:48:23,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:23,934 INFO L225 Difference]: With dead ends: 41 [2021-08-21 17:48:23,934 INFO L226 Difference]: Without dead ends: 41 [2021-08-21 17:48:23,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 1219.7ms TimeCoverageRelationStatistics Valid=136, Invalid=2414, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 17:48:23,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-08-21 17:48:23,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-08-21 17:48:23,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.05) internal successors, (42), 40 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:23,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 42 transitions. [2021-08-21 17:48:23,936 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 42 transitions. Word has length 39 [2021-08-21 17:48:23,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:23,936 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 42 transitions. [2021-08-21 17:48:23,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.163265306122449) internal successors, (57), 49 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) [2021-08-21 17:48:23,936 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 42 transitions. [2021-08-21 17:48:23,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 17:48:23,936 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:23,936 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:23,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-08-21 17:48:24,137 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,SelfDestructingSolverStorable44 [2021-08-21 17:48:24,137 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:24,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:24,137 INFO L82 PathProgramCache]: Analyzing trace with hash -74957915, now seen corresponding path program 43 times [2021-08-21 17:48:24,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:24,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453169847] [2021-08-21 17:48:24,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:24,138 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:24,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:26,514 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:26,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:26,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453169847] [2021-08-21 17:48:26,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453169847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:26,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050971972] [2021-08-21 17:48:26,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:48:26,515 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:26,515 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:26,516 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:26,517 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-08-21 17:48:28,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:28,858 WARN L261 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 185 conjunts are in the unsatisfiable core [2021-08-21 17:48:28,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:39,260 INFO L354 Elim1Store]: treesize reduction 1378, result has 0.2 percent of original size [2021-08-21 17:48:39,261 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 16 select indices, 16 select index equivalence classes, 0 disjoint index pairs (out of 120 index pairs), introduced 16 new quantified variables, introduced 120 case distinctions, treesize of input 228 treesize of output 163 [2021-08-21 17:48:39,268 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:48:39,268 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 62 treesize of output 53 [2021-08-21 17:48:39,381 INFO L134 CoverageAnalysis]: Checked inductivity of 240 backedges. 0 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:39,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1050971972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:39,381 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:39,381 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34] total 66 [2021-08-21 17:48:39,381 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013556086] [2021-08-21 17:48:39,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-08-21 17:48:39,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:39,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-08-21 17:48:39,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=4129, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 17:48:39,382 INFO L87 Difference]: Start difference. First operand 41 states and 42 transitions. Second operand has 66 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 66 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:43,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:43,031 INFO L93 Difference]: Finished difference Result 68 states and 70 transitions. [2021-08-21 17:48:43,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 17:48:43,032 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 66 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-21 17:48:43,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:43,032 INFO L225 Difference]: With dead ends: 68 [2021-08-21 17:48:43,032 INFO L226 Difference]: Without dead ends: 65 [2021-08-21 17:48:43,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 91 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1126 ImplicationChecksByTransitivity, 7356.4ms TimeCoverageRelationStatistics Valid=294, Invalid=6512, Unknown=0, NotChecked=0, Total=6806 [2021-08-21 17:48:43,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-08-21 17:48:43,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 44. [2021-08-21 17:48:43,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:43,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2021-08-21 17:48:43,034 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 40 [2021-08-21 17:48:43,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:43,034 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2021-08-21 17:48:43,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.1515151515151516) internal successors, (76), 66 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:43,034 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2021-08-21 17:48:43,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 17:48:43,034 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:43,034 INFO L512 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:43,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-08-21 17:48:43,248 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,SelfDestructingSolverStorable45 [2021-08-21 17:48:43,249 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:43,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:43,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1938014775, now seen corresponding path program 44 times [2021-08-21 17:48:43,249 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:43,249 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1173321004] [2021-08-21 17:48:43,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:43,249 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:44,131 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:44,131 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:44,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1173321004] [2021-08-21 17:48:44,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1173321004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:44,131 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047911478] [2021-08-21 17:48:44,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:48:44,131 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:44,132 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:44,137 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:44,138 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-08-21 17:48:46,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:48:46,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:46,800 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-21 17:48:46,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:47,748 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-21 17:48:47,750 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-21 17:48:47,814 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 16 proven. 240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:47,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047911478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:47,814 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:47,814 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2021-08-21 17:48:47,814 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051784413] [2021-08-21 17:48:47,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-21 17:48:47,815 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:47,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-21 17:48:47,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2519, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 17:48:47,815 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:49,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:49,019 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2021-08-21 17:48:49,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 17:48:49,020 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 17:48:49,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:49,020 INFO L225 Difference]: With dead ends: 59 [2021-08-21 17:48:49,020 INFO L226 Difference]: Without dead ends: 42 [2021-08-21 17:48:49,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 546 ImplicationChecksByTransitivity, 1930.4ms TimeCoverageRelationStatistics Valid=270, Invalid=4560, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 17:48:49,021 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-08-21 17:48:49,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-08-21 17:48:49,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:49,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2021-08-21 17:48:49,021 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 41 [2021-08-21 17:48:49,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:49,021 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2021-08-21 17:48:49,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:49,022 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2021-08-21 17:48:49,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-08-21 17:48:49,022 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:49,022 INFO L512 BasicCegarLoop]: trace histogram [16, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:49,047 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-21 17:48:49,222 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,SelfDestructingSolverStorable46 [2021-08-21 17:48:49,222 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:49,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:49,223 INFO L82 PathProgramCache]: Analyzing trace with hash -1542393671, now seen corresponding path program 45 times [2021-08-21 17:48:49,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:49,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933327893] [2021-08-21 17:48:49,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:49,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:49,975 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:49,975 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:49,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933327893] [2021-08-21 17:48:49,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933327893] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:49,975 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667814785] [2021-08-21 17:48:49,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:48:49,975 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:49,975 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:49,976 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:49,978 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-08-21 17:48:52,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-21 17:48:52,677 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:52,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-21 17:48:52,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:48:53,598 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 17:48:53,601 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 17:48:53,604 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-21 17:48:53,661 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:53,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667814785] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:53,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:48:53,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2021-08-21 17:48:53,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278745960] [2021-08-21 17:48:53,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-21 17:48:53,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:48:53,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-21 17:48:53,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=133, Invalid=2519, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 17:48:53,662 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:54,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:48:54,330 INFO L93 Difference]: Finished difference Result 43 states and 44 transitions. [2021-08-21 17:48:54,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 17:48:54,330 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-08-21 17:48:54,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:48:54,331 INFO L225 Difference]: With dead ends: 43 [2021-08-21 17:48:54,331 INFO L226 Difference]: Without dead ends: 43 [2021-08-21 17:48:54,331 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 1296.4ms TimeCoverageRelationStatistics Valid=144, Invalid=2718, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 17:48:54,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-21 17:48:54,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-08-21 17:48:54,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0476190476190477) internal successors, (44), 42 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:54,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 44 transitions. [2021-08-21 17:48:54,332 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 44 transitions. Word has length 41 [2021-08-21 17:48:54,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:48:54,332 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 44 transitions. [2021-08-21 17:48:54,333 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.1538461538461537) internal successors, (60), 52 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:48:54,333 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 44 transitions. [2021-08-21 17:48:54,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-08-21 17:48:54,333 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:48:54,333 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:48:54,358 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-08-21 17:48:54,533 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:54,533 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:48:54,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:48:54,534 INFO L82 PathProgramCache]: Analyzing trace with hash -602820701, now seen corresponding path program 46 times [2021-08-21 17:48:54,534 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:48:54,534 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158176345] [2021-08-21 17:48:54,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:48:54,534 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:48:54,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:48:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:48:56,352 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:48:56,352 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158176345] [2021-08-21 17:48:56,353 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158176345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:48:56,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1493768193] [2021-08-21 17:48:56,353 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:48:56,353 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:48:56,353 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:48:56,354 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:48:56,354 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-08-21 17:48:59,061 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:48:59,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:48:59,064 WARN L261 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 197 conjunts are in the unsatisfiable core [2021-08-21 17:48:59,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:11,779 INFO L354 Elim1Store]: treesize reduction 1566, result has 0.2 percent of original size [2021-08-21 17:49:11,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 17 select indices, 17 select index equivalence classes, 0 disjoint index pairs (out of 136 index pairs), introduced 17 new quantified variables, introduced 136 case distinctions, treesize of input 239 treesize of output 170 [2021-08-21 17:49:11,792 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:49:11,792 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 62 treesize of output 53 [2021-08-21 17:49:11,834 INFO L134 CoverageAnalysis]: Checked inductivity of 272 backedges. 0 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:11,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1493768193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:11,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:11,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 36] total 69 [2021-08-21 17:49:11,835 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1060803718] [2021-08-21 17:49:11,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-08-21 17:49:11,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:11,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-08-21 17:49:11,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=4524, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 17:49:11,836 INFO L87 Difference]: Start difference. First operand 43 states and 44 transitions. Second operand has 69 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 69 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:15,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:15,719 INFO L93 Difference]: Finished difference Result 71 states and 73 transitions. [2021-08-21 17:49:15,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 17:49:15,719 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 69 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-08-21 17:49:15,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:15,719 INFO L225 Difference]: With dead ends: 71 [2021-08-21 17:49:15,720 INFO L226 Difference]: Without dead ends: 68 [2021-08-21 17:49:15,720 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1223 ImplicationChecksByTransitivity, 7408.3ms TimeCoverageRelationStatistics Valid=308, Invalid=7174, Unknown=0, NotChecked=0, Total=7482 [2021-08-21 17:49:15,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-21 17:49:15,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 46. [2021-08-21 17:49:15,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 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) [2021-08-21 17:49:15,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2021-08-21 17:49:15,721 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 42 [2021-08-21 17:49:15,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:15,721 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2021-08-21 17:49:15,721 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.1014492753623188) internal successors, (76), 69 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:15,722 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2021-08-21 17:49:15,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 17:49:15,722 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:15,722 INFO L512 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:15,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 17:49:15,937 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,SelfDestructingSolverStorable48 [2021-08-21 17:49:15,937 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:15,937 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:15,937 INFO L82 PathProgramCache]: Analyzing trace with hash -1540829703, now seen corresponding path program 47 times [2021-08-21 17:49:15,937 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:15,937 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017061168] [2021-08-21 17:49:15,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:15,938 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:15,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:16,765 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:16,765 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:16,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017061168] [2021-08-21 17:49:16,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017061168] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:16,765 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549412013] [2021-08-21 17:49:16,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:49:16,766 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:16,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:16,766 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:16,768 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-08-21 17:49:19,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-08-21 17:49:19,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:19,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 74 conjunts are in the unsatisfiable core [2021-08-21 17:49:19,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:20,822 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-21 17:49:20,824 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-21 17:49:20,890 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 17 proven. 272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:20,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549412013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:20,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:20,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 55 [2021-08-21 17:49:20,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1495352675] [2021-08-21 17:49:20,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-21 17:49:20,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:20,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-21 17:49:20,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2829, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 17:49:20,892 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 55 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:22,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:22,200 INFO L93 Difference]: Finished difference Result 62 states and 63 transitions. [2021-08-21 17:49:22,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 17:49:22,200 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 17:49:22,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:22,201 INFO L225 Difference]: With dead ends: 62 [2021-08-21 17:49:22,201 INFO L226 Difference]: Without dead ends: 44 [2021-08-21 17:49:22,201 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 2027.2ms TimeCoverageRelationStatistics Valid=286, Invalid=5116, Unknown=0, NotChecked=0, Total=5402 [2021-08-21 17:49:22,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-08-21 17:49:22,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-08-21 17:49:22,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:22,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2021-08-21 17:49:22,203 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 43 [2021-08-21 17:49:22,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:22,203 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2021-08-21 17:49:22,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:22,203 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2021-08-21 17:49:22,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 17:49:22,203 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:22,203 INFO L512 BasicCegarLoop]: trace histogram [17, 16, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:22,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-21 17:49:22,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 17:49:22,421 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:22,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:22,421 INFO L82 PathProgramCache]: Analyzing trace with hash -2059309129, now seen corresponding path program 48 times [2021-08-21 17:49:22,421 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:22,421 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833308094] [2021-08-21 17:49:22,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:22,422 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:22,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:23,458 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:23,458 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:23,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833308094] [2021-08-21 17:49:23,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833308094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:23,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167954109] [2021-08-21 17:49:23,459 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:49:23,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:23,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:23,460 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:23,460 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-08-21 17:49:26,555 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-08-21 17:49:26,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:26,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 292 conjuncts, 74 conjunts are in the unsatisfiable core [2021-08-21 17:49:26,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:27,557 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 17:49:27,559 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-21 17:49:27,563 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 17:49:27,618 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:27,618 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167954109] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:27,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:27,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 55 [2021-08-21 17:49:27,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226412614] [2021-08-21 17:49:27,619 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-21 17:49:27,619 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:27,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-21 17:49:27,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=2829, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 17:49:27,619 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 55 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:28,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:28,375 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2021-08-21 17:49:28,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 17:49:28,376 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 17:49:28,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:28,376 INFO L225 Difference]: With dead ends: 45 [2021-08-21 17:49:28,376 INFO L226 Difference]: Without dead ends: 45 [2021-08-21 17:49:28,377 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 1611.2ms TimeCoverageRelationStatistics Valid=152, Invalid=3040, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 17:49:28,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-08-21 17:49:28,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-08-21 17:49:28,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0454545454545454) internal successors, (46), 44 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:28,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 46 transitions. [2021-08-21 17:49:28,378 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 46 transitions. Word has length 43 [2021-08-21 17:49:28,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:28,378 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 46 transitions. [2021-08-21 17:49:28,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.1454545454545455) internal successors, (63), 55 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:28,378 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 46 transitions. [2021-08-21 17:49:28,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-08-21 17:49:28,379 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:28,379 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:28,413 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-08-21 17:49:28,592 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:28,593 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:28,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:28,593 INFO L82 PathProgramCache]: Analyzing trace with hash 552669285, now seen corresponding path program 49 times [2021-08-21 17:49:28,593 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:28,593 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833351196] [2021-08-21 17:49:28,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:28,593 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:28,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:30,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:30,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833351196] [2021-08-21 17:49:30,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833351196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:30,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1413164803] [2021-08-21 17:49:30,703 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:49:30,703 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:30,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:30,705 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:30,706 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-08-21 17:49:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:33,726 WARN L261 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 209 conjunts are in the unsatisfiable core [2021-08-21 17:49:33,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:47,400 INFO L354 Elim1Store]: treesize reduction 1766, result has 0.2 percent of original size [2021-08-21 17:49:47,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 18 select indices, 18 select index equivalence classes, 0 disjoint index pairs (out of 153 index pairs), introduced 18 new quantified variables, introduced 153 case distinctions, treesize of input 250 treesize of output 177 [2021-08-21 17:49:47,407 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:49:47,407 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 62 treesize of output 53 [2021-08-21 17:49:47,535 INFO L134 CoverageAnalysis]: Checked inductivity of 306 backedges. 0 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:47,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1413164803] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:47,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:47,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 38] total 74 [2021-08-21 17:49:47,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2051933968] [2021-08-21 17:49:47,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-08-21 17:49:47,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:47,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-08-21 17:49:47,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=5221, Unknown=0, NotChecked=0, Total=5402 [2021-08-21 17:49:47,537 INFO L87 Difference]: Start difference. First operand 45 states and 46 transitions. Second operand has 74 states, 74 states have (on average 1.135135135135135) internal successors, (84), 74 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:51,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:51,956 INFO L93 Difference]: Finished difference Result 74 states and 76 transitions. [2021-08-21 17:49:51,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 17:49:51,956 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.135135135135135) internal successors, (84), 74 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-08-21 17:49:51,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:51,956 INFO L225 Difference]: With dead ends: 74 [2021-08-21 17:49:51,957 INFO L226 Difference]: Without dead ends: 71 [2021-08-21 17:49:51,957 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 8387.3ms TimeCoverageRelationStatistics Valid=330, Invalid=8226, Unknown=0, NotChecked=0, Total=8556 [2021-08-21 17:49:51,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-08-21 17:49:51,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2021-08-21 17:49:51,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:51,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2021-08-21 17:49:51,958 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 44 [2021-08-21 17:49:51,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:51,959 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2021-08-21 17:49:51,959 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.135135135135135) internal successors, (84), 74 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:51,959 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2021-08-21 17:49:51,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-21 17:49:51,959 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:51,959 INFO L512 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:51,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-08-21 17:49:52,185 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,SelfDestructingSolverStorable51 [2021-08-21 17:49:52,185 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:52,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:52,185 INFO L82 PathProgramCache]: Analyzing trace with hash -80378505, now seen corresponding path program 50 times [2021-08-21 17:49:52,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:52,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903962901] [2021-08-21 17:49:52,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:52,186 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:52,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:49:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:53,363 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:49:53,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903962901] [2021-08-21 17:49:53,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903962901] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:53,363 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024998471] [2021-08-21 17:49:53,363 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:49:53,363 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:53,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:49:53,364 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:49:53,365 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-08-21 17:49:56,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:49:56,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:49:56,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-21 17:49:56,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:49:58,005 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-21 17:49:58,007 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-21 17:49:58,090 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 18 proven. 306 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:49:58,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024998471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:49:58,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:49:58,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2021-08-21 17:49:58,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364794190] [2021-08-21 17:49:58,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-08-21 17:49:58,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:49:58,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-08-21 17:49:58,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=3157, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 17:49:58,092 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 58 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:59,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:49:59,547 INFO L93 Difference]: Finished difference Result 65 states and 66 transitions. [2021-08-21 17:49:59,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 17:49:59,548 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-21 17:49:59,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:49:59,548 INFO L225 Difference]: With dead ends: 65 [2021-08-21 17:49:59,548 INFO L226 Difference]: Without dead ends: 46 [2021-08-21 17:49:59,549 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 686 ImplicationChecksByTransitivity, 2422.8ms TimeCoverageRelationStatistics Valid=302, Invalid=5704, Unknown=0, NotChecked=0, Total=6006 [2021-08-21 17:49:59,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-08-21 17:49:59,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-08-21 17:49:59,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0444444444444445) internal successors, (47), 45 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) [2021-08-21 17:49:59,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 47 transitions. [2021-08-21 17:49:59,550 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 47 transitions. Word has length 45 [2021-08-21 17:49:59,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:49:59,550 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 47 transitions. [2021-08-21 17:49:59,551 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:49:59,551 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 47 transitions. [2021-08-21 17:49:59,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-08-21 17:49:59,551 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:49:59,551 INFO L512 BasicCegarLoop]: trace histogram [18, 17, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:49:59,583 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-08-21 17:49:59,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:49:59,762 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:49:59,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:49:59,762 INFO L82 PathProgramCache]: Analyzing trace with hash 1026628473, now seen corresponding path program 51 times [2021-08-21 17:49:59,762 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:49:59,762 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [699175842] [2021-08-21 17:49:59,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:49:59,762 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:49:59,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:00,702 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:00,702 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:00,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [699175842] [2021-08-21 17:50:00,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [699175842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:00,702 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409089079] [2021-08-21 17:50:00,702 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:50:00,702 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:00,703 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:00,703 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:50:00,704 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-08-21 17:50:04,254 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-21 17:50:04,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:04,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-21 17:50:04,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:05,454 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 17:50:05,457 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-21 17:50:05,461 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 17:50:05,535 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:05,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409089079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:05,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:05,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2021-08-21 17:50:05,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1569957292] [2021-08-21 17:50:05,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-08-21 17:50:05,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:05,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-08-21 17:50:05,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=3157, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 17:50:05,537 INFO L87 Difference]: Start difference. First operand 46 states and 47 transitions. Second operand has 58 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:06,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:06,368 INFO L93 Difference]: Finished difference Result 47 states and 48 transitions. [2021-08-21 17:50:06,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 17:50:06,368 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-08-21 17:50:06,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:06,369 INFO L225 Difference]: With dead ends: 47 [2021-08-21 17:50:06,369 INFO L226 Difference]: Without dead ends: 47 [2021-08-21 17:50:06,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 1677.4ms TimeCoverageRelationStatistics Valid=160, Invalid=3380, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 17:50:06,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-08-21 17:50:06,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-08-21 17:50:06,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0434782608695652) internal successors, (48), 46 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) [2021-08-21 17:50:06,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 48 transitions. [2021-08-21 17:50:06,371 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 48 transitions. Word has length 45 [2021-08-21 17:50:06,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:06,371 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 48 transitions. [2021-08-21 17:50:06,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.1379310344827587) internal successors, (66), 58 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:06,371 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 48 transitions. [2021-08-21 17:50:06,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 17:50:06,371 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:06,371 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:06,405 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 17:50:06,584 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,SelfDestructingSolverStorable53 [2021-08-21 17:50:06,585 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:06,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:06,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1727454435, now seen corresponding path program 52 times [2021-08-21 17:50:06,585 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:06,585 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22644031] [2021-08-21 17:50:06,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:06,585 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:06,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:08,851 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:08,851 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:08,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22644031] [2021-08-21 17:50:08,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22644031] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:08,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573419486] [2021-08-21 17:50:08,851 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:50:08,851 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:08,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:08,854 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:50:08,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 17:50:12,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:50:12,298 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:12,301 WARN L261 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 221 conjunts are in the unsatisfiable core [2021-08-21 17:50:12,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:26,548 INFO L354 Elim1Store]: treesize reduction 1978, result has 0.2 percent of original size [2021-08-21 17:50:26,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 19 select indices, 19 select index equivalence classes, 0 disjoint index pairs (out of 171 index pairs), introduced 19 new quantified variables, introduced 171 case distinctions, treesize of input 261 treesize of output 184 [2021-08-21 17:50:26,556 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:50:26,556 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 62 treesize of output 53 [2021-08-21 17:50:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 342 backedges. 0 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:26,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573419486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:26,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:26,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 40] total 78 [2021-08-21 17:50:26,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142235116] [2021-08-21 17:50:26,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-08-21 17:50:26,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:26,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-08-21 17:50:26,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=5815, Unknown=0, NotChecked=0, Total=6006 [2021-08-21 17:50:26,688 INFO L87 Difference]: Start difference. First operand 47 states and 48 transitions. Second operand has 78 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 78 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:34,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:34,279 INFO L93 Difference]: Finished difference Result 77 states and 79 transitions. [2021-08-21 17:50:34,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 17:50:34,280 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 78 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-21 17:50:34,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:34,280 INFO L225 Difference]: With dead ends: 77 [2021-08-21 17:50:34,280 INFO L226 Difference]: Without dead ends: 74 [2021-08-21 17:50:34,280 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1594 ImplicationChecksByTransitivity, 11784.2ms TimeCoverageRelationStatistics Valid=348, Invalid=9158, Unknown=0, NotChecked=0, Total=9506 [2021-08-21 17:50:34,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-08-21 17:50:34,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 50. [2021-08-21 17:50:34,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0612244897959184) internal successors, (52), 49 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:34,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 52 transitions. [2021-08-21 17:50:34,282 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 52 transitions. Word has length 46 [2021-08-21 17:50:34,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:34,282 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 52 transitions. [2021-08-21 17:50:34,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.1282051282051282) internal successors, (88), 78 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:34,282 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 52 transitions. [2021-08-21 17:50:34,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:50:34,283 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:34,283 INFO L512 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:34,315 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-08-21 17:50:34,492 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,SelfDestructingSolverStorable54 [2021-08-21 17:50:34,493 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:34,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:34,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1978222777, now seen corresponding path program 53 times [2021-08-21 17:50:34,493 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:34,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785596032] [2021-08-21 17:50:34,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:34,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:34,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:35,620 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:35,621 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:35,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785596032] [2021-08-21 17:50:35,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785596032] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:35,621 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879335982] [2021-08-21 17:50:35,621 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:50:35,621 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:35,621 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:35,622 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:50:35,623 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-08-21 17:50:39,565 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-21 17:50:39,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:39,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 82 conjunts are in the unsatisfiable core [2021-08-21 17:50:39,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:40,844 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-21 17:50:40,846 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-21 17:50:40,923 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 19 proven. 342 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:40,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879335982] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:40,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:40,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 61 [2021-08-21 17:50:40,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036679520] [2021-08-21 17:50:40,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-08-21 17:50:40,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:40,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-08-21 17:50:40,924 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=3503, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 17:50:40,924 INFO L87 Difference]: Start difference. First operand 50 states and 52 transitions. Second operand has 61 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:42,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:42,425 INFO L93 Difference]: Finished difference Result 68 states and 69 transitions. [2021-08-21 17:50:42,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 17:50:42,425 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:50:42,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:42,426 INFO L225 Difference]: With dead ends: 68 [2021-08-21 17:50:42,426 INFO L226 Difference]: Without dead ends: 48 [2021-08-21 17:50:42,426 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 2567.2ms TimeCoverageRelationStatistics Valid=318, Invalid=6324, Unknown=0, NotChecked=0, Total=6642 [2021-08-21 17:50:42,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-08-21 17:50:42,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-08-21 17:50:42,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 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) [2021-08-21 17:50:42,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2021-08-21 17:50:42,427 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 47 [2021-08-21 17:50:42,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:42,427 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2021-08-21 17:50:42,427 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:42,428 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2021-08-21 17:50:42,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-08-21 17:50:42,428 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:42,428 INFO L512 BasicCegarLoop]: trace histogram [19, 18, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:42,458 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-21 17:50:42,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:42,628 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:42,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:42,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1935700727, now seen corresponding path program 54 times [2021-08-21 17:50:42,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:42,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585646043] [2021-08-21 17:50:42,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:42,629 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:42,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:43,824 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:43,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:43,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585646043] [2021-08-21 17:50:43,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585646043] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:43,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080407948] [2021-08-21 17:50:43,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:50:43,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:43,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:43,826 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:50:43,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-08-21 17:50:47,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-21 17:50:47,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:50:47,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 82 conjunts are in the unsatisfiable core [2021-08-21 17:50:47,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:50:48,940 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 17:50:48,943 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-21 17:50:48,947 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 17:50:49,012 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:49,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080407948] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:49,012 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:50:49,012 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 61 [2021-08-21 17:50:49,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450544957] [2021-08-21 17:50:49,013 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-08-21 17:50:49,013 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:50:49,013 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-08-21 17:50:49,013 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=3503, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 17:50:49,013 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 61 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:49,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:50:49,931 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2021-08-21 17:50:49,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 17:50:49,932 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-08-21 17:50:49,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:50:49,932 INFO L225 Difference]: With dead ends: 49 [2021-08-21 17:50:49,932 INFO L226 Difference]: Without dead ends: 49 [2021-08-21 17:50:49,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 1961.2ms TimeCoverageRelationStatistics Valid=168, Invalid=3738, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 17:50:49,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-21 17:50:49,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-08-21 17:50:49,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0416666666666667) internal successors, (50), 48 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:49,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 50 transitions. [2021-08-21 17:50:49,934 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 50 transitions. Word has length 47 [2021-08-21 17:50:49,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:50:49,934 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 50 transitions. [2021-08-21 17:50:49,934 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.1311475409836065) internal successors, (69), 61 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:50:49,934 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 50 transitions. [2021-08-21 17:50:49,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-08-21 17:50:49,934 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:50:49,934 INFO L512 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:50:49,965 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-08-21 17:50:50,140 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:50,141 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:50:50,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:50:50,141 INFO L82 PathProgramCache]: Analyzing trace with hash -156076763, now seen corresponding path program 55 times [2021-08-21 17:50:50,141 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:50:50,141 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175687205] [2021-08-21 17:50:50,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:50:50,141 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:50:50,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:52,200 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:50:52,201 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:50:52,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175687205] [2021-08-21 17:50:52,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175687205] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:50:52,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819598304] [2021-08-21 17:50:52,201 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:50:52,201 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:50:52,201 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:50:52,202 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:50:52,202 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-08-21 17:50:56,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:50:56,180 WARN L261 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 233 conjunts are in the unsatisfiable core [2021-08-21 17:50:56,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:51:14,842 INFO L354 Elim1Store]: treesize reduction 2202, result has 0.1 percent of original size [2021-08-21 17:51:14,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 20 select indices, 20 select index equivalence classes, 0 disjoint index pairs (out of 190 index pairs), introduced 20 new quantified variables, introduced 190 case distinctions, treesize of input 272 treesize of output 191 [2021-08-21 17:51:14,856 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:51:14,857 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 62 treesize of output 53 [2021-08-21 17:51:14,912 INFO L134 CoverageAnalysis]: Checked inductivity of 380 backedges. 0 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:14,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1819598304] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:14,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:51:14,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42] total 81 [2021-08-21 17:51:14,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27460996] [2021-08-21 17:51:14,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-08-21 17:51:14,913 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:14,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-08-21 17:51:14,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=198, Invalid=6282, Unknown=0, NotChecked=0, Total=6480 [2021-08-21 17:51:14,913 INFO L87 Difference]: Start difference. First operand 49 states and 50 transitions. Second operand has 81 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 81 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:21,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:21,457 INFO L93 Difference]: Finished difference Result 80 states and 82 transitions. [2021-08-21 17:51:21,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 17:51:21,457 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 81 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-08-21 17:51:21,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:21,457 INFO L225 Difference]: With dead ends: 80 [2021-08-21 17:51:21,457 INFO L226 Difference]: Without dead ends: 77 [2021-08-21 17:51:21,458 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1709 ImplicationChecksByTransitivity, 11421.6ms TimeCoverageRelationStatistics Valid=362, Invalid=9940, Unknown=0, NotChecked=0, Total=10302 [2021-08-21 17:51:21,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-08-21 17:51:21,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 52. [2021-08-21 17:51:21,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0588235294117647) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:21,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2021-08-21 17:51:21,459 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 48 [2021-08-21 17:51:21,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:21,460 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2021-08-21 17:51:21,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.0864197530864197) internal successors, (88), 81 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:21,460 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2021-08-21 17:51:21,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 17:51:21,460 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:21,460 INFO L512 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:21,493 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-21 17:51:21,668 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:21,669 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:51:21,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:21,669 INFO L82 PathProgramCache]: Analyzing trace with hash -576669513, now seen corresponding path program 56 times [2021-08-21 17:51:21,669 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:21,669 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290674297] [2021-08-21 17:51:21,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:21,669 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:21,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:22,979 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:22,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:22,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290674297] [2021-08-21 17:51:22,980 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290674297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:22,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074178289] [2021-08-21 17:51:22,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:51:22,980 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:22,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:51:22,981 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:51:22,981 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-08-21 17:51:27,289 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:51:27,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:51:27,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 86 conjunts are in the unsatisfiable core [2021-08-21 17:51:27,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:51:28,714 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-21 17:51:28,716 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-21 17:51:28,792 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 20 proven. 380 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:28,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074178289] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:28,792 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:51:28,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2021-08-21 17:51:28,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704036675] [2021-08-21 17:51:28,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-08-21 17:51:28,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:28,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-08-21 17:51:28,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3867, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 17:51:28,794 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 64 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:30,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:30,470 INFO L93 Difference]: Finished difference Result 71 states and 72 transitions. [2021-08-21 17:51:30,471 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 17:51:30,471 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 17:51:30,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:30,471 INFO L225 Difference]: With dead ends: 71 [2021-08-21 17:51:30,471 INFO L226 Difference]: Without dead ends: 50 [2021-08-21 17:51:30,472 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 842 ImplicationChecksByTransitivity, 2840.0ms TimeCoverageRelationStatistics Valid=334, Invalid=6976, Unknown=0, NotChecked=0, Total=7310 [2021-08-21 17:51:30,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-08-21 17:51:30,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-08-21 17:51:30,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0408163265306123) internal successors, (51), 49 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:30,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 51 transitions. [2021-08-21 17:51:30,473 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 51 transitions. Word has length 49 [2021-08-21 17:51:30,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:30,473 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 51 transitions. [2021-08-21 17:51:30,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:30,473 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 51 transitions. [2021-08-21 17:51:30,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 17:51:30,473 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:30,473 INFO L512 BasicCegarLoop]: trace histogram [20, 19, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:30,507 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Ended with exit code 0 [2021-08-21 17:51:30,680 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,SelfDestructingSolverStorable58 [2021-08-21 17:51:30,681 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:51:30,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:30,681 INFO L82 PathProgramCache]: Analyzing trace with hash -1894853063, now seen corresponding path program 57 times [2021-08-21 17:51:30,681 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:30,681 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863084123] [2021-08-21 17:51:30,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:30,681 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:30,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:31,790 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:31,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:31,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863084123] [2021-08-21 17:51:31,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1863084123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:31,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691191224] [2021-08-21 17:51:31,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:51:31,840 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:31,840 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:51:31,842 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:51:31,843 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-08-21 17:51:36,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-08-21 17:51:36,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:51:36,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 88 conjunts are in the unsatisfiable core [2021-08-21 17:51:36,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:51:37,550 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 17:51:37,553 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-21 17:51:37,557 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 17:51:37,623 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:37,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691191224] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:37,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:51:37,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2021-08-21 17:51:37,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2104860751] [2021-08-21 17:51:37,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-08-21 17:51:37,624 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:51:37,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-08-21 17:51:37,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=3867, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 17:51:37,625 INFO L87 Difference]: Start difference. First operand 50 states and 51 transitions. Second operand has 64 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:38,635 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:51:38,635 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2021-08-21 17:51:38,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 17:51:38,636 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 17:51:38,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:51:38,636 INFO L225 Difference]: With dead ends: 51 [2021-08-21 17:51:38,636 INFO L226 Difference]: Without dead ends: 51 [2021-08-21 17:51:38,637 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 27 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 1994.2ms TimeCoverageRelationStatistics Valid=176, Invalid=4114, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 17:51:38,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-08-21 17:51:38,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-08-21 17:51:38,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.04) internal successors, (52), 50 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:38,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 52 transitions. [2021-08-21 17:51:38,638 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 52 transitions. Word has length 49 [2021-08-21 17:51:38,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:51:38,638 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 52 transitions. [2021-08-21 17:51:38,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.125) internal successors, (72), 64 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:51:38,638 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 52 transitions. [2021-08-21 17:51:38,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-08-21 17:51:38,638 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:51:38,639 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:51:38,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-08-21 17:51:38,844 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,SelfDestructingSolverStorable59 [2021-08-21 17:51:38,845 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:51:38,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:51:38,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1355840035, now seen corresponding path program 58 times [2021-08-21 17:51:38,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:51:38,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196427656] [2021-08-21 17:51:38,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:51:38,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:51:38,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:51:41,475 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:51:41,476 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:51:41,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196427656] [2021-08-21 17:51:41,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196427656] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:51:41,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532959090] [2021-08-21 17:51:41,476 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:51:41,476 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:51:41,476 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:51:41,484 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:51:41,485 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-08-21 17:51:45,819 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:51:45,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:51:45,823 WARN L261 TraceCheckSpWp]: Trace formula consists of 348 conjuncts, 245 conjunts are in the unsatisfiable core [2021-08-21 17:51:45,825 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:52:04,067 INFO L354 Elim1Store]: treesize reduction 2438, result has 0.1 percent of original size [2021-08-21 17:52:04,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 21 select indices, 21 select index equivalence classes, 0 disjoint index pairs (out of 210 index pairs), introduced 21 new quantified variables, introduced 210 case distinctions, treesize of input 283 treesize of output 198 [2021-08-21 17:52:04,075 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:52:04,075 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 62 treesize of output 53 [2021-08-21 17:52:04,118 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:04,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532959090] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:04,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:52:04,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 44] total 85 [2021-08-21 17:52:04,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606964905] [2021-08-21 17:52:04,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-08-21 17:52:04,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:52:04,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-08-21 17:52:04,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=6932, Unknown=0, NotChecked=0, Total=7140 [2021-08-21 17:52:04,119 INFO L87 Difference]: Start difference. First operand 51 states and 52 transitions. Second operand has 85 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 85 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:13,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:52:13,936 INFO L93 Difference]: Finished difference Result 83 states and 85 transitions. [2021-08-21 17:52:13,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 17:52:13,936 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 85 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-08-21 17:52:13,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:52:13,936 INFO L225 Difference]: With dead ends: 83 [2021-08-21 17:52:13,937 INFO L226 Difference]: Without dead ends: 80 [2021-08-21 17:52:13,937 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1889 ImplicationChecksByTransitivity, 14860.5ms TimeCoverageRelationStatistics Valid=380, Invalid=10962, Unknown=0, NotChecked=0, Total=11342 [2021-08-21 17:52:13,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-08-21 17:52:13,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 54. [2021-08-21 17:52:13,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 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) [2021-08-21 17:52:13,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2021-08-21 17:52:13,939 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 50 [2021-08-21 17:52:13,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:52:13,939 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2021-08-21 17:52:13,939 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.0823529411764705) internal successors, (92), 85 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:13,939 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2021-08-21 17:52:13,939 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-21 17:52:13,939 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:52:13,939 INFO L512 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:52:13,972 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-08-21 17:52:14,144 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:14,145 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:52:14,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:52:14,146 INFO L82 PathProgramCache]: Analyzing trace with hash -951889031, now seen corresponding path program 59 times [2021-08-21 17:52:14,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:52:14,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683968062] [2021-08-21 17:52:14,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:52:14,146 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:52:14,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:52:15,645 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:15,646 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:52:15,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683968062] [2021-08-21 17:52:15,646 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [683968062] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:15,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947125979] [2021-08-21 17:52:15,646 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:52:15,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:15,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:52:15,647 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:52:15,652 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 17:52:20,421 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-08-21 17:52:20,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:52:20,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 90 conjunts are in the unsatisfiable core [2021-08-21 17:52:20,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:52:21,947 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-21 17:52:21,948 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-21 17:52:22,040 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 21 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:22,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947125979] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:22,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:52:22,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 67 [2021-08-21 17:52:22,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606097129] [2021-08-21 17:52:22,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-08-21 17:52:22,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:52:22,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-08-21 17:52:22,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=4249, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 17:52:22,041 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 67 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 67 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:23,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:52:23,909 INFO L93 Difference]: Finished difference Result 74 states and 75 transitions. [2021-08-21 17:52:23,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 17:52:23,910 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 67 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-21 17:52:23,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:52:23,910 INFO L225 Difference]: With dead ends: 74 [2021-08-21 17:52:23,910 INFO L226 Difference]: Without dead ends: 52 [2021-08-21 17:52:23,911 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 926 ImplicationChecksByTransitivity, 3260.7ms TimeCoverageRelationStatistics Valid=350, Invalid=7660, Unknown=0, NotChecked=0, Total=8010 [2021-08-21 17:52:23,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-08-21 17:52:23,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-08-21 17:52:23,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0392156862745099) internal successors, (53), 51 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:23,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 53 transitions. [2021-08-21 17:52:23,912 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 53 transitions. Word has length 51 [2021-08-21 17:52:23,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:52:23,912 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 53 transitions. [2021-08-21 17:52:23,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 67 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:23,912 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 53 transitions. [2021-08-21 17:52:23,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-08-21 17:52:23,912 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:52:23,912 INFO L512 BasicCegarLoop]: trace histogram [21, 20, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:52:23,946 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-08-21 17:52:24,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:24,113 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:52:24,113 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:52:24,113 INFO L82 PathProgramCache]: Analyzing trace with hash 1134093879, now seen corresponding path program 60 times [2021-08-21 17:52:24,113 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:52:24,113 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851986191] [2021-08-21 17:52:24,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:52:24,114 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:52:24,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:52:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:25,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:52:25,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851986191] [2021-08-21 17:52:25,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851986191] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:25,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1797226036] [2021-08-21 17:52:25,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:52:25,667 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:25,667 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:52:25,668 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:52:25,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-08-21 17:52:30,472 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-21 17:52:30,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:52:30,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 90 conjunts are in the unsatisfiable core [2021-08-21 17:52:30,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:52:31,928 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 17:52:31,931 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 17:52:31,935 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-21 17:52:32,005 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:32,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1797226036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:32,005 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:52:32,005 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 67 [2021-08-21 17:52:32,005 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539764477] [2021-08-21 17:52:32,005 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-08-21 17:52:32,005 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:52:32,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-08-21 17:52:32,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=4249, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 17:52:32,006 INFO L87 Difference]: Start difference. First operand 52 states and 53 transitions. Second operand has 67 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 67 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:33,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:52:33,064 INFO L93 Difference]: Finished difference Result 53 states and 54 transitions. [2021-08-21 17:52:33,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 17:52:33,064 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 67 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-08-21 17:52:33,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:52:33,064 INFO L225 Difference]: With dead ends: 53 [2021-08-21 17:52:33,064 INFO L226 Difference]: Without dead ends: 53 [2021-08-21 17:52:33,065 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 97 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 274 ImplicationChecksByTransitivity, 2375.0ms TimeCoverageRelationStatistics Valid=184, Invalid=4508, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 17:52:33,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-21 17:52:33,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-08-21 17:52:33,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0384615384615385) internal successors, (54), 52 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:33,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 54 transitions. [2021-08-21 17:52:33,066 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 54 transitions. Word has length 51 [2021-08-21 17:52:33,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:52:33,066 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 54 transitions. [2021-08-21 17:52:33,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.1194029850746268) internal successors, (75), 67 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:52:33,067 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 54 transitions. [2021-08-21 17:52:33,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 17:52:33,067 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:52:33,067 INFO L512 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:52:33,109 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-08-21 17:52:33,292 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:33,293 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:52:33,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:52:33,293 INFO L82 PathProgramCache]: Analyzing trace with hash 763914725, now seen corresponding path program 61 times [2021-08-21 17:52:33,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:52:33,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407243745] [2021-08-21 17:52:33,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:52:33,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:52:33,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:52:35,785 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:52:35,785 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:52:35,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407243745] [2021-08-21 17:52:35,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1407243745] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:52:35,786 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320505226] [2021-08-21 17:52:35,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:52:35,786 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:52:35,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:52:35,787 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:52:35,787 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-08-21 17:52:40,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:52:40,789 WARN L261 TraceCheckSpWp]: Trace formula consists of 364 conjuncts, 257 conjunts are in the unsatisfiable core [2021-08-21 17:52:40,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:53:09,439 INFO L354 Elim1Store]: treesize reduction 2686, result has 0.1 percent of original size [2021-08-21 17:53:09,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 22 select indices, 22 select index equivalence classes, 0 disjoint index pairs (out of 231 index pairs), introduced 22 new quantified variables, introduced 231 case distinctions, treesize of input 294 treesize of output 205 [2021-08-21 17:53:09,449 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:53:09,449 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 62 treesize of output 53 [2021-08-21 17:53:09,597 INFO L134 CoverageAnalysis]: Checked inductivity of 462 backedges. 0 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:09,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1320505226] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:53:09,597 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:53:09,597 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 46] total 90 [2021-08-21 17:53:09,598 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593778991] [2021-08-21 17:53:09,598 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-08-21 17:53:09,598 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:53:09,598 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-08-21 17:53:09,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=221, Invalid=7789, Unknown=0, NotChecked=0, Total=8010 [2021-08-21 17:53:09,599 INFO L87 Difference]: Start difference. First operand 53 states and 54 transitions. Second operand has 90 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 90 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:16,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:53:16,899 INFO L93 Difference]: Finished difference Result 86 states and 88 transitions. [2021-08-21 17:53:16,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 17:53:16,899 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 90 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-21 17:53:16,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:53:16,900 INFO L225 Difference]: With dead ends: 86 [2021-08-21 17:53:16,900 INFO L226 Difference]: Without dead ends: 83 [2021-08-21 17:53:16,901 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2143 ImplicationChecksByTransitivity, 14043.1ms TimeCoverageRelationStatistics Valid=402, Invalid=12254, Unknown=0, NotChecked=0, Total=12656 [2021-08-21 17:53:16,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-21 17:53:16,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 56. [2021-08-21 17:53:16,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0545454545454545) internal successors, (58), 55 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:16,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 58 transitions. [2021-08-21 17:53:16,902 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 58 transitions. Word has length 52 [2021-08-21 17:53:16,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:53:16,903 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 58 transitions. [2021-08-21 17:53:16,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.1111111111111112) internal successors, (100), 90 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:16,903 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 58 transitions. [2021-08-21 17:53:16,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 17:53:16,903 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:53:16,903 INFO L512 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:53:16,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-08-21 17:53:17,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:53:17,104 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:53:17,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:53:17,104 INFO L82 PathProgramCache]: Analyzing trace with hash -2121704457, now seen corresponding path program 62 times [2021-08-21 17:53:17,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:53:17,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562306988] [2021-08-21 17:53:17,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:53:17,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:53:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:18,473 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:18,473 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:53:18,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562306988] [2021-08-21 17:53:18,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562306988] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:53:18,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509280004] [2021-08-21 17:53:18,474 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:53:18,474 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:53:18,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:53:18,476 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:53:18,477 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-08-21 17:53:23,728 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:53:23,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:53:23,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 94 conjunts are in the unsatisfiable core [2021-08-21 17:53:23,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:53:25,321 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-21 17:53:25,323 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-21 17:53:25,420 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 22 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:25,420 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509280004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:53:25,420 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:53:25,421 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 70 [2021-08-21 17:53:25,421 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218843236] [2021-08-21 17:53:25,421 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-08-21 17:53:25,421 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:53:25,421 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-08-21 17:53:25,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=4649, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 17:53:25,422 INFO L87 Difference]: Start difference. First operand 56 states and 58 transitions. Second operand has 70 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:27,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:53:27,452 INFO L93 Difference]: Finished difference Result 77 states and 78 transitions. [2021-08-21 17:53:27,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 17:53:27,453 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 17:53:27,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:53:27,453 INFO L225 Difference]: With dead ends: 77 [2021-08-21 17:53:27,453 INFO L226 Difference]: Without dead ends: 54 [2021-08-21 17:53:27,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1014 ImplicationChecksByTransitivity, 3275.5ms TimeCoverageRelationStatistics Valid=366, Invalid=8376, Unknown=0, NotChecked=0, Total=8742 [2021-08-21 17:53:27,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-08-21 17:53:27,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-08-21 17:53:27,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:27,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2021-08-21 17:53:27,455 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 53 [2021-08-21 17:53:27,455 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:53:27,455 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2021-08-21 17:53:27,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:27,456 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2021-08-21 17:53:27,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-08-21 17:53:27,456 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:53:27,456 INFO L512 BasicCegarLoop]: trace histogram [22, 21, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:53:27,494 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-08-21 17:53:27,665 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,SelfDestructingSolverStorable64 [2021-08-21 17:53:27,665 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:53:27,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:53:27,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1880743687, now seen corresponding path program 63 times [2021-08-21 17:53:27,666 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:53:27,666 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381117463] [2021-08-21 17:53:27,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:53:27,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:53:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:29,026 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:29,026 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:53:29,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381117463] [2021-08-21 17:53:29,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1381117463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:53:29,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715862567] [2021-08-21 17:53:29,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:53:29,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:53:29,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:53:29,034 INFO L229 MonitoredProcess]: Starting monitored process 65 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:53:29,035 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-08-21 17:53:34,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-08-21 17:53:34,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:53:34,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 372 conjuncts, 94 conjunts are in the unsatisfiable core [2021-08-21 17:53:34,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:53:35,883 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 17:53:35,885 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-21 17:53:35,889 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 17:53:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:35,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715862567] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:53:35,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:53:35,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 70 [2021-08-21 17:53:35,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358497591] [2021-08-21 17:53:35,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-08-21 17:53:35,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:53:35,959 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-08-21 17:53:35,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=4649, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 17:53:35,960 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 70 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:37,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:53:37,088 INFO L93 Difference]: Finished difference Result 55 states and 56 transitions. [2021-08-21 17:53:37,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 17:53:37,089 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-08-21 17:53:37,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:53:37,089 INFO L225 Difference]: With dead ends: 55 [2021-08-21 17:53:37,089 INFO L226 Difference]: Without dead ends: 55 [2021-08-21 17:53:37,089 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 29 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 2390.5ms TimeCoverageRelationStatistics Valid=192, Invalid=4920, Unknown=0, NotChecked=0, Total=5112 [2021-08-21 17:53:37,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-21 17:53:37,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-08-21 17:53:37,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.037037037037037) internal successors, (56), 54 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) [2021-08-21 17:53:37,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 56 transitions. [2021-08-21 17:53:37,091 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 56 transitions. Word has length 53 [2021-08-21 17:53:37,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:53:37,091 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 56 transitions. [2021-08-21 17:53:37,091 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.1142857142857143) internal successors, (78), 70 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:53:37,091 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 56 transitions. [2021-08-21 17:53:37,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-08-21 17:53:37,091 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:53:37,091 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:53:37,127 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-08-21 17:53:37,296 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:53:37,297 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:53:37,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:53:37,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1793230691, now seen corresponding path program 64 times [2021-08-21 17:53:37,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:53:37,297 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074660944] [2021-08-21 17:53:37,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:53:37,297 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:53:37,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:53:41,360 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:53:41,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:53:41,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074660944] [2021-08-21 17:53:41,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074660944] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:53:41,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927685344] [2021-08-21 17:53:41,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:53:41,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:53:41,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:53:41,361 INFO L229 MonitoredProcess]: Starting monitored process 66 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:53:41,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-08-21 17:53:46,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:53:46,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:53:46,677 WARN L261 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 269 conjunts are in the unsatisfiable core [2021-08-21 17:53:46,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:54:17,130 INFO L354 Elim1Store]: treesize reduction 2946, result has 0.1 percent of original size [2021-08-21 17:54:17,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 23 select indices, 23 select index equivalence classes, 0 disjoint index pairs (out of 253 index pairs), introduced 23 new quantified variables, introduced 253 case distinctions, treesize of input 306 treesize of output 213 [2021-08-21 17:54:17,139 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:54:17,139 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 63 treesize of output 54 [2021-08-21 17:54:17,327 INFO L134 CoverageAnalysis]: Checked inductivity of 506 backedges. 0 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:17,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927685344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:54:17,328 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:54:17,328 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 48] total 95 [2021-08-21 17:54:17,328 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807565486] [2021-08-21 17:54:17,328 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-08-21 17:54:17,328 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:54:17,328 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-08-21 17:54:17,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=8720, Unknown=0, NotChecked=0, Total=8930 [2021-08-21 17:54:17,329 INFO L87 Difference]: Start difference. First operand 55 states and 56 transitions. Second operand has 95 states, 95 states have (on average 1.0947368421052632) internal successors, (104), 95 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:38,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:54:38,747 INFO L93 Difference]: Finished difference Result 89 states and 91 transitions. [2021-08-21 17:54:38,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 17:54:38,747 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.0947368421052632) internal successors, (104), 95 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-08-21 17:54:38,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:54:38,748 INFO L225 Difference]: With dead ends: 89 [2021-08-21 17:54:38,748 INFO L226 Difference]: Without dead ends: 86 [2021-08-21 17:54:38,749 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1561 ImplicationChecksByTransitivity, 28271.8ms TimeCoverageRelationStatistics Valid=428, Invalid=13852, Unknown=0, NotChecked=0, Total=14280 [2021-08-21 17:54:38,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-08-21 17:54:38,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 58. [2021-08-21 17:54:38,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:38,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2021-08-21 17:54:38,750 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 54 [2021-08-21 17:54:38,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:54:38,750 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2021-08-21 17:54:38,750 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.0947368421052632) internal successors, (104), 95 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:38,751 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2021-08-21 17:54:38,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 17:54:38,751 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:54:38,751 INFO L512 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:54:38,788 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-08-21 17:54:38,956 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,SelfDestructingSolverStorable66 [2021-08-21 17:54:38,957 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:54:38,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:54:38,957 INFO L82 PathProgramCache]: Analyzing trace with hash -277680583, now seen corresponding path program 65 times [2021-08-21 17:54:38,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:54:38,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767561798] [2021-08-21 17:54:38,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:54:38,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:54:39,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:54:40,450 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:40,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:54:40,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767561798] [2021-08-21 17:54:40,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767561798] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:54:40,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1415320351] [2021-08-21 17:54:40,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:54:40,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:54:40,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:54:40,452 INFO L229 MonitoredProcess]: Starting monitored process 67 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:54:40,452 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-08-21 17:54:46,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-08-21 17:54:46,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:54:46,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 98 conjunts are in the unsatisfiable core [2021-08-21 17:54:46,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:54:48,049 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-21 17:54:48,051 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-21 17:54:48,137 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 23 proven. 506 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:48,137 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1415320351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:54:48,137 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:54:48,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 73 [2021-08-21 17:54:48,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [736171920] [2021-08-21 17:54:48,138 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-08-21 17:54:48,138 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:54:48,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-08-21 17:54:48,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=5067, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 17:54:48,139 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 73 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:50,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:54:50,365 INFO L93 Difference]: Finished difference Result 80 states and 81 transitions. [2021-08-21 17:54:50,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 17:54:50,365 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 73 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 17:54:50,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:54:50,366 INFO L225 Difference]: With dead ends: 80 [2021-08-21 17:54:50,366 INFO L226 Difference]: Without dead ends: 56 [2021-08-21 17:54:50,366 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1106 ImplicationChecksByTransitivity, 3609.7ms TimeCoverageRelationStatistics Valid=382, Invalid=9124, Unknown=0, NotChecked=0, Total=9506 [2021-08-21 17:54:50,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-08-21 17:54:50,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-08-21 17:54:50,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 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) [2021-08-21 17:54:50,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2021-08-21 17:54:50,368 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 55 [2021-08-21 17:54:50,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:54:50,368 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2021-08-21 17:54:50,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 73 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:54:50,368 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2021-08-21 17:54:50,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 17:54:50,368 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:54:50,369 INFO L512 BasicCegarLoop]: trace histogram [23, 22, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:54:50,415 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-08-21 17:54:50,589 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,SelfDestructingSolverStorable67 [2021-08-21 17:54:50,589 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:54:50,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:54:50,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1397831305, now seen corresponding path program 66 times [2021-08-21 17:54:50,589 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:54:50,589 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [982076399] [2021-08-21 17:54:50,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:54:50,589 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:54:50,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:54:52,091 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:52,092 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:54:52,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [982076399] [2021-08-21 17:54:52,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [982076399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:54:52,092 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839347125] [2021-08-21 17:54:52,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:54:52,092 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:54:52,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:54:52,093 INFO L229 MonitoredProcess]: Starting monitored process 68 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:54:52,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-08-21 17:54:57,970 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-08-21 17:54:57,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:54:57,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 388 conjuncts, 98 conjunts are in the unsatisfiable core [2021-08-21 17:54:57,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:54:59,663 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 17:54:59,665 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 17:54:59,670 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-21 17:54:59,740 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:54:59,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839347125] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:54:59,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:54:59,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 73 [2021-08-21 17:54:59,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41094726] [2021-08-21 17:54:59,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-08-21 17:54:59,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:54:59,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-08-21 17:54:59,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=189, Invalid=5067, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 17:54:59,742 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 73 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:01,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:01,288 INFO L93 Difference]: Finished difference Result 57 states and 58 transitions. [2021-08-21 17:55:01,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 17:55:01,288 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 73 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 17:55:01,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:01,289 INFO L225 Difference]: With dead ends: 57 [2021-08-21 17:55:01,289 INFO L226 Difference]: Without dead ends: 57 [2021-08-21 17:55:01,289 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 323 ImplicationChecksByTransitivity, 2694.7ms TimeCoverageRelationStatistics Valid=200, Invalid=5350, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 17:55:01,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-08-21 17:55:01,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-08-21 17:55:01,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0357142857142858) internal successors, (58), 56 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:01,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 58 transitions. [2021-08-21 17:55:01,291 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 58 transitions. Word has length 55 [2021-08-21 17:55:01,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:01,291 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 58 transitions. [2021-08-21 17:55:01,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.1095890410958904) internal successors, (81), 73 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:01,291 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 58 transitions. [2021-08-21 17:55:01,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-08-21 17:55:01,291 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:01,291 INFO L512 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:01,332 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:01,492 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,SelfDestructingSolverStorable68 [2021-08-21 17:55:01,492 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:01,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:01,492 INFO L82 PathProgramCache]: Analyzing trace with hash -416354651, now seen corresponding path program 67 times [2021-08-21 17:55:01,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:01,492 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558814431] [2021-08-21 17:55:01,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:01,493 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:01,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:04,697 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:04,698 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:04,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558814431] [2021-08-21 17:55:04,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558814431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:04,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65097060] [2021-08-21 17:55:04,698 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 17:55:04,698 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:04,698 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:04,699 INFO L229 MonitoredProcess]: Starting monitored process 69 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:55:04,699 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-08-21 17:55:10,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:10,697 WARN L261 TraceCheckSpWp]: Trace formula consists of 396 conjuncts, 281 conjunts are in the unsatisfiable core [2021-08-21 17:55:10,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:34,448 INFO L354 Elim1Store]: treesize reduction 3218, result has 0.1 percent of original size [2021-08-21 17:55:34,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 24 select indices, 24 select index equivalence classes, 0 disjoint index pairs (out of 276 index pairs), introduced 24 new quantified variables, introduced 276 case distinctions, treesize of input 316 treesize of output 219 [2021-08-21 17:55:34,457 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:55:34,458 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 62 treesize of output 53 [2021-08-21 17:55:34,561 INFO L134 CoverageAnalysis]: Checked inductivity of 552 backedges. 0 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:34,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65097060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:34,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:34,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50] total 97 [2021-08-21 17:55:34,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322235914] [2021-08-21 17:55:34,562 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-08-21 17:55:34,562 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:34,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-08-21 17:55:34,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=238, Invalid=9074, Unknown=0, NotChecked=0, Total=9312 [2021-08-21 17:55:34,563 INFO L87 Difference]: Start difference. First operand 57 states and 58 transitions. Second operand has 97 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:49,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:55:49,390 INFO L93 Difference]: Finished difference Result 92 states and 94 transitions. [2021-08-21 17:55:49,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 17:55:49,391 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-08-21 17:55:49,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:55:49,391 INFO L225 Difference]: With dead ends: 92 [2021-08-21 17:55:49,391 INFO L226 Difference]: Without dead ends: 89 [2021-08-21 17:55:49,393 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 9 SyntacticMatches, 2 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2530 ImplicationChecksByTransitivity, 21168.8ms TimeCoverageRelationStatistics Valid=434, Invalid=14328, Unknown=0, NotChecked=0, Total=14762 [2021-08-21 17:55:49,393 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-08-21 17:55:49,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 60. [2021-08-21 17:55:49,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:49,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2021-08-21 17:55:49,394 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 56 [2021-08-21 17:55:49,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:55:49,394 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2021-08-21 17:55:49,395 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.0721649484536082) internal successors, (104), 97 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:55:49,395 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2021-08-21 17:55:49,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 17:55:49,395 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:55:49,395 INFO L512 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:55:49,445 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-08-21 17:55:49,608 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,SelfDestructingSolverStorable69 [2021-08-21 17:55:49,609 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:55:49,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:55:49,609 INFO L82 PathProgramCache]: Analyzing trace with hash -55349449, now seen corresponding path program 68 times [2021-08-21 17:55:49,609 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:55:49,609 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827726238] [2021-08-21 17:55:49,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:55:49,609 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:55:49,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:55:51,272 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:51,272 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:55:51,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827726238] [2021-08-21 17:55:51,273 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827726238] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:51,273 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622412649] [2021-08-21 17:55:51,273 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 17:55:51,273 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:55:51,273 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:55:51,274 INFO L229 MonitoredProcess]: Starting monitored process 70 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:55:51,274 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-08-21 17:55:57,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 17:55:57,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:55:57,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 102 conjunts are in the unsatisfiable core [2021-08-21 17:55:57,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:55:59,577 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-21 17:55:59,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-21 17:55:59,661 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 24 proven. 552 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:55:59,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [622412649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:55:59,661 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:55:59,661 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2021-08-21 17:55:59,661 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490652126] [2021-08-21 17:55:59,661 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-08-21 17:55:59,661 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:55:59,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-08-21 17:55:59,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=5503, Unknown=0, NotChecked=0, Total=5700 [2021-08-21 17:55:59,662 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 76 states, 76 states have (on average 1.105263157894737) internal successors, (84), 76 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:02,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:02,001 INFO L93 Difference]: Finished difference Result 83 states and 84 transitions. [2021-08-21 17:56:02,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 17:56:02,001 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.105263157894737) internal successors, (84), 76 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 17:56:02,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:02,002 INFO L225 Difference]: With dead ends: 83 [2021-08-21 17:56:02,002 INFO L226 Difference]: Without dead ends: 58 [2021-08-21 17:56:02,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1202 ImplicationChecksByTransitivity, 3923.2ms TimeCoverageRelationStatistics Valid=398, Invalid=9904, Unknown=0, NotChecked=0, Total=10302 [2021-08-21 17:56:02,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-08-21 17:56:02,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-08-21 17:56:02,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0350877192982457) internal successors, (59), 57 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:02,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 59 transitions. [2021-08-21 17:56:02,004 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 59 transitions. Word has length 57 [2021-08-21 17:56:02,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:02,004 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 59 transitions. [2021-08-21 17:56:02,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.105263157894737) internal successors, (84), 76 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:02,004 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 59 transitions. [2021-08-21 17:56:02,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-08-21 17:56:02,004 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:02,004 INFO L512 BasicCegarLoop]: trace histogram [24, 23, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:02,045 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-08-21 17:56:02,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:02,213 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:56:02,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:02,213 INFO L82 PathProgramCache]: Analyzing trace with hash -420283463, now seen corresponding path program 69 times [2021-08-21 17:56:02,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:02,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156008074] [2021-08-21 17:56:02,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:02,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:02,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:03,921 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:56:03,921 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:03,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156008074] [2021-08-21 17:56:03,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156008074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:03,921 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [546479977] [2021-08-21 17:56:03,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 17:56:03,922 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:03,922 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:03,922 INFO L229 MonitoredProcess]: Starting monitored process 71 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:56:03,923 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-08-21 17:56:10,362 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-08-21 17:56:10,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:56:10,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 102 conjunts are in the unsatisfiable core [2021-08-21 17:56:10,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:12,159 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 17:56:12,161 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-21 17:56:12,166 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 17:56:12,239 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:56:12,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [546479977] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:12,239 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:12,239 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2021-08-21 17:56:12,239 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54832366] [2021-08-21 17:56:12,239 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-08-21 17:56:12,239 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:12,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-08-21 17:56:12,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=197, Invalid=5503, Unknown=0, NotChecked=0, Total=5700 [2021-08-21 17:56:12,241 INFO L87 Difference]: Start difference. First operand 58 states and 59 transitions. Second operand has 76 states, 76 states have (on average 1.105263157894737) internal successors, (84), 76 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:13,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:56:13,594 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2021-08-21 17:56:13,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-21 17:56:13,595 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.105263157894737) internal successors, (84), 76 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 57 [2021-08-21 17:56:13,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:56:13,595 INFO L225 Difference]: With dead ends: 59 [2021-08-21 17:56:13,595 INFO L226 Difference]: Without dead ends: 59 [2021-08-21 17:56:13,595 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 31 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 2859.1ms TimeCoverageRelationStatistics Valid=208, Invalid=5798, Unknown=0, NotChecked=0, Total=6006 [2021-08-21 17:56:13,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-08-21 17:56:13,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-08-21 17:56:13,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0344827586206897) internal successors, (60), 58 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:13,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 60 transitions. [2021-08-21 17:56:13,596 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 60 transitions. Word has length 57 [2021-08-21 17:56:13,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:56:13,597 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 60 transitions. [2021-08-21 17:56:13,597 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.105263157894737) internal successors, (84), 76 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:56:13,597 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 60 transitions. [2021-08-21 17:56:13,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-21 17:56:13,597 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:56:13,597 INFO L512 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:56:13,635 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-08-21 17:56:13,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:13,798 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:56:13,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:56:13,798 INFO L82 PathProgramCache]: Analyzing trace with hash -177142621, now seen corresponding path program 70 times [2021-08-21 17:56:13,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:56:13,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079759040] [2021-08-21 17:56:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:56:13,798 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:56:13,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:56:16,855 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:56:16,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:56:16,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079759040] [2021-08-21 17:56:16,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079759040] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:16,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2043065651] [2021-08-21 17:56:16,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 17:56:16,855 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:56:16,856 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:56:16,856 INFO L229 MonitoredProcess]: Starting monitored process 72 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:56:16,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-08-21 17:56:23,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 17:56:23,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:56:23,359 WARN L261 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 293 conjunts are in the unsatisfiable core [2021-08-21 17:56:23,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:56:59,500 INFO L354 Elim1Store]: treesize reduction 3502, result has 0.1 percent of original size [2021-08-21 17:56:59,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 25 select indices, 25 select index equivalence classes, 0 disjoint index pairs (out of 300 index pairs), introduced 25 new quantified variables, introduced 300 case distinctions, treesize of input 327 treesize of output 226 [2021-08-21 17:56:59,509 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 17:56:59,510 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 62 treesize of output 53 [2021-08-21 17:56:59,552 INFO L134 CoverageAnalysis]: Checked inductivity of 600 backedges. 0 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:56:59,553 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2043065651] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:56:59,553 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:56:59,553 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 52] total 101 [2021-08-21 17:56:59,553 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286045706] [2021-08-21 17:56:59,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-08-21 17:56:59,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:56:59,553 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-08-21 17:56:59,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=248, Invalid=9852, Unknown=0, NotChecked=0, Total=10100 [2021-08-21 17:56:59,554 INFO L87 Difference]: Start difference. First operand 59 states and 60 transitions. Second operand has 101 states, 101 states have (on average 1.0693069306930694) internal successors, (108), 101 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:15,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:15,934 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2021-08-21 17:57:15,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 17:57:15,934 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0693069306930694) internal successors, (108), 101 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-08-21 17:57:15,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:15,935 INFO L225 Difference]: With dead ends: 95 [2021-08-21 17:57:15,935 INFO L226 Difference]: Without dead ends: 92 [2021-08-21 17:57:15,936 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2699 ImplicationChecksByTransitivity, 23511.0ms TimeCoverageRelationStatistics Valid=452, Invalid=15550, Unknown=0, NotChecked=0, Total=16002 [2021-08-21 17:57:15,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-08-21 17:57:15,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 62. [2021-08-21 17:57:15,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0491803278688525) internal successors, (64), 61 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:15,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 64 transitions. [2021-08-21 17:57:15,937 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 64 transitions. Word has length 58 [2021-08-21 17:57:15,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:15,937 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 64 transitions. [2021-08-21 17:57:15,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0693069306930694) internal successors, (108), 101 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:15,938 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 64 transitions. [2021-08-21 17:57:15,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 17:57:15,938 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:15,938 INFO L512 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:15,989 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:16,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:16,153 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:57:16,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:16,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1229711111, now seen corresponding path program 71 times [2021-08-21 17:57:16,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:16,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001419001] [2021-08-21 17:57:16,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:16,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:16,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:17,871 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:17,871 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:17,871 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001419001] [2021-08-21 17:57:17,871 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001419001] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:17,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158126838] [2021-08-21 17:57:17,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 17:57:17,872 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:17,872 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:17,872 INFO L229 MonitoredProcess]: Starting monitored process 73 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:57:17,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-08-21 17:57:25,100 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-08-21 17:57:25,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:25,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 106 conjunts are in the unsatisfiable core [2021-08-21 17:57:25,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:27,113 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 37 treesize of output 31 [2021-08-21 17:57:27,115 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 31 treesize of output 25 [2021-08-21 17:57:27,202 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 25 proven. 600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:27,202 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158126838] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:27,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:27,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2021-08-21 17:57:27,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142274850] [2021-08-21 17:57:27,202 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-08-21 17:57:27,202 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:27,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-08-21 17:57:27,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=5957, Unknown=0, NotChecked=0, Total=6162 [2021-08-21 17:57:27,203 INFO L87 Difference]: Start difference. First operand 62 states and 64 transitions. Second operand has 79 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 79 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:29,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:29,679 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2021-08-21 17:57:29,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 17:57:29,680 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 79 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 17:57:29,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:29,680 INFO L225 Difference]: With dead ends: 86 [2021-08-21 17:57:29,680 INFO L226 Difference]: Without dead ends: 60 [2021-08-21 17:57:29,681 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1302 ImplicationChecksByTransitivity, 4134.9ms TimeCoverageRelationStatistics Valid=414, Invalid=10716, Unknown=0, NotChecked=0, Total=11130 [2021-08-21 17:57:29,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-08-21 17:57:29,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-08-21 17:57:29,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:29,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2021-08-21 17:57:29,682 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 59 [2021-08-21 17:57:29,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:29,682 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2021-08-21 17:57:29,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 79 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:29,683 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2021-08-21 17:57:29,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-08-21 17:57:29,683 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:29,683 INFO L512 BasicCegarLoop]: trace histogram [25, 24, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:29,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-08-21 17:57:29,896 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,SelfDestructingSolverStorable73 [2021-08-21 17:57:29,897 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:57:29,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:29,897 INFO L82 PathProgramCache]: Analyzing trace with hash 342236343, now seen corresponding path program 72 times [2021-08-21 17:57:29,897 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:29,897 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141907299] [2021-08-21 17:57:29,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:29,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:29,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 17:57:31,597 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:31,597 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 17:57:31,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141907299] [2021-08-21 17:57:31,597 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2141907299] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:31,597 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574215384] [2021-08-21 17:57:31,597 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 17:57:31,598 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:31,598 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 17:57:31,599 INFO L229 MonitoredProcess]: Starting monitored process 74 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 17:57:31,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-08-21 17:57:38,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-08-21 17:57:38,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 17:57:38,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 106 conjunts are in the unsatisfiable core [2021-08-21 17:57:38,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 17:57:40,881 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 29 treesize of output 23 [2021-08-21 17:57:40,883 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 1 [2021-08-21 17:57:40,887 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2021-08-21 17:57:40,964 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 17:57:40,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574215384] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 17:57:40,964 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 17:57:40,964 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2021-08-21 17:57:40,965 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330864185] [2021-08-21 17:57:40,965 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-08-21 17:57:40,965 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 17:57:40,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-08-21 17:57:40,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=205, Invalid=5957, Unknown=0, NotChecked=0, Total=6162 [2021-08-21 17:57:40,966 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 79 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 79 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:42,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 17:57:42,439 INFO L93 Difference]: Finished difference Result 61 states and 62 transitions. [2021-08-21 17:57:42,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 17:57:42,439 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 79 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-08-21 17:57:42,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 17:57:42,440 INFO L225 Difference]: With dead ends: 61 [2021-08-21 17:57:42,440 INFO L226 Difference]: Without dead ends: 61 [2021-08-21 17:57:42,440 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 32 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 376 ImplicationChecksByTransitivity, 3081.9ms TimeCoverageRelationStatistics Valid=216, Invalid=6264, Unknown=0, NotChecked=0, Total=6480 [2021-08-21 17:57:42,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-21 17:57:42,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-08-21 17:57:42,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0333333333333334) internal successors, (62), 60 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:42,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 62 transitions. [2021-08-21 17:57:42,441 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 62 transitions. Word has length 59 [2021-08-21 17:57:42,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 17:57:42,442 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 62 transitions. [2021-08-21 17:57:42,442 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.1012658227848102) internal successors, (87), 79 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 17:57:42,442 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 62 transitions. [2021-08-21 17:57:42,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-08-21 17:57:42,442 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 17:57:42,442 INFO L512 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 17:57:42,491 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-08-21 17:57:42,660 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 17:57:42,661 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-08-21 17:57:42,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 17:57:42,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1986134885, now seen corresponding path program 73 times [2021-08-21 17:57:42,661 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 17:57:42,661 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133565487] [2021-08-21 17:57:42,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 17:57:42,661 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 17:57:42,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Received shutdown request... [2021-08-21 17:57:44,816 WARN L223 SmtUtils]: Removed 6 from assertion stack [2021-08-21 17:57:44,817 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 17:57:44,817 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2021-08-21 17:57:44,818 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 61 with TraceHistMax 25,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 39 for 27ms.. [2021-08-21 17:57:44,818 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 17:57:44,819 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 17:57:44,822 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 17:57:44,822 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 17:57:44,823 INFO L202 PluginConnector]: Adding new model array-int-symm.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 05:57:44 BasicIcfg [2021-08-21 17:57:44,823 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 17:57:44,824 INFO L168 Benchmark]: Toolchain (without parser) took 729763.12 ms. Allocated memory was 210.8 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 191.4 MB in the beginning and 913.8 MB in the end (delta: -722.4 MB). Peak memory consumption was 578.6 MB. Max. memory is 8.0 GB. [2021-08-21 17:57:44,824 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.16 ms. Allocated memory is still 210.8 MB. Free memory is still 192.6 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 17:57:44,824 INFO L168 Benchmark]: Boogie Procedure Inliner took 27.17 ms. Allocated memory is still 210.8 MB. Free memory was 191.4 MB in the beginning and 189.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 17:57:44,824 INFO L168 Benchmark]: Boogie Preprocessor took 16.29 ms. Allocated memory is still 210.8 MB. Free memory was 189.9 MB in the beginning and 188.9 MB in the end (delta: 913.2 kB). There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 17:57:44,825 INFO L168 Benchmark]: RCFGBuilder took 399.18 ms. Allocated memory is still 210.8 MB. Free memory was 188.8 MB in the beginning and 171.5 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. [2021-08-21 17:57:44,825 INFO L168 Benchmark]: TraceAbstraction took 729315.53 ms. Allocated memory was 210.8 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 171.0 MB in the beginning and 913.8 MB in the end (delta: -742.8 MB). Peak memory consumption was 557.6 MB. Max. memory is 8.0 GB. [2021-08-21 17:57:44,825 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 0.16 ms. Allocated memory is still 210.8 MB. Free memory is still 192.6 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 27.17 ms. Allocated memory is still 210.8 MB. Free memory was 191.4 MB in the beginning and 189.9 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 16.29 ms. Allocated memory is still 210.8 MB. Free memory was 189.9 MB in the beginning and 188.9 MB in the end (delta: 913.2 kB). There was no memory consumed. Max. memory is 8.0 GB. * RCFGBuilder took 399.18 ms. Allocated memory is still 210.8 MB. Free memory was 188.8 MB in the beginning and 171.5 MB in the end (delta: 17.3 MB). Peak memory consumption was 16.8 MB. Max. memory is 8.0 GB. * TraceAbstraction took 729315.53 ms. Allocated memory was 210.8 MB in the beginning and 1.5 GB in the end (delta: 1.3 GB). Free memory was 171.0 MB in the beginning and 913.8 MB in the end (delta: -742.8 MB). Peak memory consumption was 557.6 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 20, positive: 15, positive conditional: 15, positive unconditional: 0, negative: 5, negative conditional: 5, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 15, positive: 15, positive conditional: 0, positive unconditional: 15, 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: 15, positive: 15, positive conditional: 0, positive unconditional: 15, 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: 15, positive: 15, positive conditional: 0, positive unconditional: 15, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 0, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 15, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 15, unknown conditional: 0, unknown unconditional: 15] , Statistics on independence cache: Total cache size (in pairs): 15, Positive cache size: 15, Positive conditional cache size: 0, Positive unconditional cache size: 15, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 5 - 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: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 61 with TraceHistMax 25,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 39 for 27ms.. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 61 with TraceHistMax 25,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 39 for 27ms.. - 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 analyzing trace of length 61 with TraceHistMax 25,while InterpolatingTraceCheckCraig was constructing Craig interpolants,while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 39 for 27ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 23 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 729220.4ms, OverallIterations: 76, TraceHistogramMax: 25, EmptinessCheckTime: 43.5ms, AutomataDifference: 157291.0ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 74.1ms, PartialOrderReductionTime: 61.2ms, HoareTripleCheckerStatistics: 530 SDtfs, 1019 SDslu, 15103 SDs, 0 SdLazy, 98807 SolverSat, 1926 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 56928.2ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5457 GetRequests, 1220 SyntacticMatches, 126 SemanticMatches, 4111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38152 ImplicationChecksByTransitivity, 256330.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=73, InterpolantAutomatonStates: 2178, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 131.5ms AutomataMinimizationTime, 75 MinimizatonAttempts, 450 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 610.0ms SsaConstructionTime, 4451.7ms SatisfiabilityAnalysisTime, 377384.3ms InterpolantComputationTime, 5179 NumberOfCodeBlocks, 5179 NumberOfCodeBlocksAsserted, 418 NumberOfCheckSat, 5031 ConstructedInterpolants, 343 QuantifiedInterpolants, 190709 SizeOfPredicates, 440 NumberOfNonLiveVariables, 16836 ConjunctsInSsa, 6618 ConjunctsInUnsatCore, 148 InterpolantComputations, 2 PerfectInterpolantSequences, 649/32499 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