/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Delay.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:34:24,324 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:34:24,326 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:34:24,350 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 18:34:24,351 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 18:34:24,353 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 18:34:24,355 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 18:34:24,359 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 18:34:24,361 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 18:34:24,364 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 18:34:24,364 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 18:34:24,365 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 18:34:24,365 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 18:34:24,367 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 18:34:24,368 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 18:34:24,369 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 18:34:24,370 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 18:34:24,370 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 18:34:24,373 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 18:34:24,379 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 18:34:24,381 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 18:34:24,385 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 18:34:24,386 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 18:34:24,387 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 18:34:24,392 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 18:34:24,395 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 18:34:24,395 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 18:34:24,396 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 18:34:24,397 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 18:34:24,398 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 18:34:24,398 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 18:34:24,398 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 18:34:24,398 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 18:34:24,398 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 18:34:24,399 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 18:34:24,399 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 18:34:24,400 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 18:34:24,426 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:34:24,426 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:34:24,428 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:34:24,428 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:34:24,429 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:34:24,429 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:34:24,429 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:34:24,429 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:34:24,429 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:34:24,429 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:34:24,430 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:34:24,430 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:34:24,430 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:34:24,430 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:34:24,430 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:34:24,430 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:34:24,430 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:34:24,431 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:34:24,431 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:34:24,431 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:34:24,431 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:34:24,431 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:34:24,431 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:34:24,431 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:34:24,431 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:34:24,431 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:34:24,432 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:34:24,432 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:34:24,432 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:34:24,432 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:34:24,432 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:34:24,675 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:34:24,696 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:34:24,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:34:24,698 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:34:24,699 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:34:24,699 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun.wvr.bpl [2021-08-21 18:34:24,700 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/min-fun.wvr.bpl' [2021-08-21 18:34:24,724 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:34:24,725 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:34:24,726 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:34:24,726 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:34:24,726 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:34:24,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:24" (1/1) ... [2021-08-21 18:34:24,741 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:24" (1/1) ... [2021-08-21 18:34:24,747 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:34:24,748 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:34:24,748 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:34:24,748 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:34:24,754 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:24" (1/1) ... [2021-08-21 18:34:24,754 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:24" (1/1) ... [2021-08-21 18:34:24,755 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:24" (1/1) ... [2021-08-21 18:34:24,756 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:24" (1/1) ... [2021-08-21 18:34:24,760 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:24" (1/1) ... [2021-08-21 18:34:24,763 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:24" (1/1) ... [2021-08-21 18:34:24,764 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:24" (1/1) ... [2021-08-21 18:34:24,768 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:34:24,769 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:34:24,769 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:34:24,769 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:34:24,770 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:24" (1/1) ... [2021-08-21 18:34:24,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:34:24,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:24,798 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 18:34:24,803 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 18:34:24,839 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 18:34:24,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 18:34:24,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 18:34:24,840 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 18:34:24,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 18:34:24,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 18:34:24,840 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:34:24,840 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:34:24,840 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:34:24,840 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 18:34:24,840 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 18:34:24,840 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 18:34:24,841 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 18:34:25,048 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:34:25,049 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 18:34:25,050 INFO L202 PluginConnector]: Adding new model min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:34:25 BoogieIcfgContainer [2021-08-21 18:34:25,050 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:34:25,052 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:34:25,052 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:34:25,053 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:34:25,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:34:24" (1/2) ... [2021-08-21 18:34:25,054 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@40e260b9 and model type min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:34:25, skipping insertion in model container [2021-08-21 18:34:25,054 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:34:25" (2/2) ... [2021-08-21 18:34:25,055 INFO L111 eAbstractionObserver]: Analyzing ICFG min-fun.wvr.bpl [2021-08-21 18:34:25,058 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:34:25,058 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:34:25,059 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:34:25,059 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:34:25,126 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 18:34:25,169 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:34:25,187 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 18:34:25,187 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 18:34:25,281 INFO L276 IsEmpty]: Start isEmpty. Operand has 112 states, 79 states have (on average 1.7468354430379747) internal successors, (138), 111 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:25,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-08-21 18:34:25,295 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:25,296 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:25,296 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:25,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:25,301 INFO L82 PathProgramCache]: Analyzing trace with hash -234537446, now seen corresponding path program 1 times [2021-08-21 18:34:25,309 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:25,310 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979233859] [2021-08-21 18:34:25,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:25,311 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:25,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:25,434 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 18:34:25,434 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:25,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979233859] [2021-08-21 18:34:25,435 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1979233859] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:34:25,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:34:25,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:34:25,436 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1989951937] [2021-08-21 18:34:25,438 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-08-21 18:34:25,438 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:25,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-08-21 18:34:25,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:34:25,447 INFO L87 Difference]: Start difference. First operand has 112 states, 79 states have (on average 1.7468354430379747) internal successors, (138), 111 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:25,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:25,469 INFO L93 Difference]: Finished difference Result 217 states and 269 transitions. [2021-08-21 18:34:25,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-08-21 18:34:25,470 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-08-21 18:34:25,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:25,475 INFO L225 Difference]: With dead ends: 217 [2021-08-21 18:34:25,476 INFO L226 Difference]: Without dead ends: 64 [2021-08-21 18:34:25,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.2ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-08-21 18:34:25,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-08-21 18:34:25,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 45. [2021-08-21 18:34:25,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.6818181818181819) internal successors, (74), 44 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:25,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 74 transitions. [2021-08-21 18:34:25,496 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 74 transitions. Word has length 18 [2021-08-21 18:34:25,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:25,496 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 74 transitions. [2021-08-21 18:34:25,496 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.0) internal successors, (18), 3 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:25,497 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 74 transitions. [2021-08-21 18:34:25,497 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:34:25,497 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:25,497 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:25,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:34:25,498 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:25,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:25,498 INFO L82 PathProgramCache]: Analyzing trace with hash -518877060, now seen corresponding path program 1 times [2021-08-21 18:34:25,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:25,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32035302] [2021-08-21 18:34:25,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:25,499 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:25,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:25,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:34:25,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:25,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32035302] [2021-08-21 18:34:25,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32035302] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:34:25,542 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:34:25,542 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:34:25,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179833938] [2021-08-21 18:34:25,543 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:34:25,543 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:25,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:34:25,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:34:25,544 INFO L87 Difference]: Start difference. First operand 45 states and 74 transitions. Second operand has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:25,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:25,570 INFO L93 Difference]: Finished difference Result 55 states and 98 transitions. [2021-08-21 18:34:25,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:34:25,570 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 18:34:25,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:25,571 INFO L225 Difference]: With dead ends: 55 [2021-08-21 18:34:25,571 INFO L226 Difference]: Without dead ends: 55 [2021-08-21 18:34:25,572 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 10.9ms TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:34:25,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-08-21 18:34:25,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 48. [2021-08-21 18:34:25,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.702127659574468) internal successors, (80), 47 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:25,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 80 transitions. [2021-08-21 18:34:25,575 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 80 transitions. Word has length 20 [2021-08-21 18:34:25,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:25,576 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 80 transitions. [2021-08-21 18:34:25,576 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:25,576 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 80 transitions. [2021-08-21 18:34:25,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-08-21 18:34:25,576 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:25,576 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:25,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 18:34:25,577 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:25,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:25,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1615051400, now seen corresponding path program 1 times [2021-08-21 18:34:25,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:25,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718115230] [2021-08-21 18:34:25,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:25,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:25,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:25,628 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:34:25,629 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:25,629 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718115230] [2021-08-21 18:34:25,629 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718115230] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:34:25,629 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:34:25,629 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-08-21 18:34:25,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701246065] [2021-08-21 18:34:25,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:34:25,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:25,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:34:25,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:34:25,633 INFO L87 Difference]: Start difference. First operand 48 states and 80 transitions. Second operand has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:25,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:25,682 INFO L93 Difference]: Finished difference Result 66 states and 114 transitions. [2021-08-21 18:34:25,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-08-21 18:34:25,682 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-08-21 18:34:25,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:25,685 INFO L225 Difference]: With dead ends: 66 [2021-08-21 18:34:25,685 INFO L226 Difference]: Without dead ends: 66 [2021-08-21 18:34:25,685 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.6ms TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:34:25,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-08-21 18:34:25,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 57. [2021-08-21 18:34:25,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.75) internal successors, (98), 56 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:25,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 98 transitions. [2021-08-21 18:34:25,689 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 98 transitions. Word has length 20 [2021-08-21 18:34:25,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:25,689 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 98 transitions. [2021-08-21 18:34:25,689 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.0) internal successors, (20), 4 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:25,690 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 98 transitions. [2021-08-21 18:34:25,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:34:25,690 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:25,690 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:25,690 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 18:34:25,690 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:25,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:25,691 INFO L82 PathProgramCache]: Analyzing trace with hash 12486490, now seen corresponding path program 1 times [2021-08-21 18:34:25,691 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:25,691 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139602683] [2021-08-21 18:34:25,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:25,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:25,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:26,115 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 18:34:26,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:26,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139602683] [2021-08-21 18:34:26,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2139602683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:26,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064082311] [2021-08-21 18:34:26,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:26,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:26,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:26,120 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 18:34:26,142 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 18:34:26,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:26,209 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 19 conjunts are in the unsatisfiable core [2021-08-21 18:34:26,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:26,721 INFO L354 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2021-08-21 18:34:26,722 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 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 40 [2021-08-21 18:34:26,893 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 18:34:26,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064082311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:26,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:26,894 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 18:34:26,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1833093831] [2021-08-21 18:34:26,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:34:26,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:26,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:34:26,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:34:26,897 INFO L87 Difference]: Start difference. First operand 57 states and 98 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 18:34:27,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:27,125 INFO L93 Difference]: Finished difference Result 121 states and 202 transitions. [2021-08-21 18:34:27,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:34:27,125 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 18:34:27,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:27,127 INFO L225 Difference]: With dead ends: 121 [2021-08-21 18:34:27,127 INFO L226 Difference]: Without dead ends: 116 [2021-08-21 18:34:27,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 309.4ms TimeCoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:34:27,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-08-21 18:34:27,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 75. [2021-08-21 18:34:27,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.864864864864865) internal successors, (138), 74 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:27,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 138 transitions. [2021-08-21 18:34:27,142 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 138 transitions. Word has length 22 [2021-08-21 18:34:27,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:27,142 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 138 transitions. [2021-08-21 18:34:27,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 12 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 18:34:27,143 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 138 transitions. [2021-08-21 18:34:27,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:34:27,144 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:27,144 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:27,163 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 18:34:27,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:27,365 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:27,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:27,366 INFO L82 PathProgramCache]: Analyzing trace with hash -1559898278, now seen corresponding path program 2 times [2021-08-21 18:34:27,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:27,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740189193] [2021-08-21 18:34:27,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:27,366 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:27,632 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 18:34:27,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:27,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740189193] [2021-08-21 18:34:27,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740189193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:27,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380120613] [2021-08-21 18:34:27,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:34:27,642 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:27,642 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:27,643 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 18:34:27,644 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 18:34:27,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:34:27,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:27,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:34:27,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:28,032 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:34:28,033 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 43 treesize of output 39 [2021-08-21 18:34:28,403 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 18:34:28,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380120613] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:28,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:28,403 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 13 [2021-08-21 18:34:28,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639429844] [2021-08-21 18:34:28,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:34:28,405 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:28,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:34:28,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:34:28,406 INFO L87 Difference]: Start difference. First operand 75 states and 138 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:28,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:28,958 INFO L93 Difference]: Finished difference Result 159 states and 270 transitions. [2021-08-21 18:34:28,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:34:28,958 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 18:34:28,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:28,959 INFO L225 Difference]: With dead ends: 159 [2021-08-21 18:34:28,959 INFO L226 Difference]: Without dead ends: 154 [2021-08-21 18:34:28,960 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 565.5ms TimeCoverageRelationStatistics Valid=123, Invalid=339, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:34:28,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-08-21 18:34:28,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 77. [2021-08-21 18:34:28,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.881578947368421) internal successors, (143), 76 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:28,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 143 transitions. [2021-08-21 18:34:28,963 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 143 transitions. Word has length 22 [2021-08-21 18:34:28,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:28,963 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 143 transitions. [2021-08-21 18:34:28,963 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 13 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:28,963 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 143 transitions. [2021-08-21 18:34:28,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:34:28,964 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:28,964 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:28,984 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2021-08-21 18:34:29,182 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:29,183 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:29,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:29,183 INFO L82 PathProgramCache]: Analyzing trace with hash -1733588454, now seen corresponding path program 3 times [2021-08-21 18:34:29,183 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:29,183 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985389394] [2021-08-21 18:34:29,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:29,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:29,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:29,391 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 18:34:29,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:29,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985389394] [2021-08-21 18:34:29,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985389394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:29,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146207110] [2021-08-21 18:34:29,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:34:29,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:29,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:29,392 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 18:34:29,393 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 18:34:29,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:34:29,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:29,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:34:29,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:29,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:34:29,848 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 43 treesize of output 39 [2021-08-21 18:34:30,203 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 18:34:30,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146207110] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:30,203 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:30,203 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 12 [2021-08-21 18:34:30,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682662047] [2021-08-21 18:34:30,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:34:30,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:30,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:34:30,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:34:30,205 INFO L87 Difference]: Start difference. First operand 77 states and 143 transitions. Second operand has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:30,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:30,524 INFO L93 Difference]: Finished difference Result 126 states and 220 transitions. [2021-08-21 18:34:30,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:34:30,525 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 18:34:30,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:30,525 INFO L225 Difference]: With dead ends: 126 [2021-08-21 18:34:30,525 INFO L226 Difference]: Without dead ends: 121 [2021-08-21 18:34:30,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 377.9ms TimeCoverageRelationStatistics Valid=99, Invalid=243, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:34:30,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-21 18:34:30,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 81. [2021-08-21 18:34:30,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.8875) internal successors, (151), 80 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:30,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 151 transitions. [2021-08-21 18:34:30,529 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 151 transitions. Word has length 22 [2021-08-21 18:34:30,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:30,529 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 151 transitions. [2021-08-21 18:34:30,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.6923076923076925) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:30,529 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 151 transitions. [2021-08-21 18:34:30,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:34:30,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:30,530 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:30,551 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 18:34:30,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:30,745 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:30,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:30,745 INFO L82 PathProgramCache]: Analyzing trace with hash 708303036, now seen corresponding path program 4 times [2021-08-21 18:34:30,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:30,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121084048] [2021-08-21 18:34:30,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:30,746 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:30,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:30,796 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:30,797 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:30,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121084048] [2021-08-21 18:34:30,797 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121084048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:30,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183880518] [2021-08-21 18:34:30,797 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:34:30,797 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:30,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:30,798 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 18:34:30,832 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 18:34:30,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:34:30,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:30,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:34:30,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:31,127 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:31,128 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [183880518] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:31,128 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:31,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 12 [2021-08-21 18:34:31,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69125200] [2021-08-21 18:34:31,128 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:34:31,128 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:31,129 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:34:31,129 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:34:31,129 INFO L87 Difference]: Start difference. First operand 81 states and 151 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:31,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:31,284 INFO L93 Difference]: Finished difference Result 192 states and 333 transitions. [2021-08-21 18:34:31,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:34:31,284 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 18:34:31,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:31,285 INFO L225 Difference]: With dead ends: 192 [2021-08-21 18:34:31,285 INFO L226 Difference]: Without dead ends: 192 [2021-08-21 18:34:31,285 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 115.2ms TimeCoverageRelationStatistics Valid=102, Invalid=278, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:34:31,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-08-21 18:34:31,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 97. [2021-08-21 18:34:31,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 2.0208333333333335) internal successors, (194), 96 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:31,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 194 transitions. [2021-08-21 18:34:31,289 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 194 transitions. Word has length 24 [2021-08-21 18:34:31,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:31,289 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 194 transitions. [2021-08-21 18:34:31,289 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:31,289 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 194 transitions. [2021-08-21 18:34:31,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:34:31,290 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:31,290 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:31,308 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-08-21 18:34:31,496 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:31,497 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:31,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:31,497 INFO L82 PathProgramCache]: Analyzing trace with hash -783191876, now seen corresponding path program 5 times [2021-08-21 18:34:31,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:31,497 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234583679] [2021-08-21 18:34:31,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:31,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:31,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:31,569 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:31,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:31,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234583679] [2021-08-21 18:34:31,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234583679] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:31,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736003216] [2021-08-21 18:34:31,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:34:31,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:31,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:31,573 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 18:34:31,582 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 18:34:31,763 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:34:31,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:31,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:34:31,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:31,893 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:31,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736003216] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:31,894 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:31,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 18:34:31,902 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682027391] [2021-08-21 18:34:31,903 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:34:31,903 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:31,904 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:34:31,904 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:34:31,904 INFO L87 Difference]: Start difference. First operand 97 states and 194 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:32,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:32,224 INFO L93 Difference]: Finished difference Result 254 states and 436 transitions. [2021-08-21 18:34:32,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:34:32,224 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 18:34:32,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:32,225 INFO L225 Difference]: With dead ends: 254 [2021-08-21 18:34:32,225 INFO L226 Difference]: Without dead ends: 254 [2021-08-21 18:34:32,226 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 209.2ms TimeCoverageRelationStatistics Valid=212, Invalid=718, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:34:32,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-08-21 18:34:32,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 99. [2021-08-21 18:34:32,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 2.010204081632653) internal successors, (197), 98 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:32,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 197 transitions. [2021-08-21 18:34:32,230 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 197 transitions. Word has length 24 [2021-08-21 18:34:32,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:32,230 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 197 transitions. [2021-08-21 18:34:32,230 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:32,230 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 197 transitions. [2021-08-21 18:34:32,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:34:32,231 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:32,231 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:32,250 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 18:34:32,436 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:32,437 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:32,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:32,437 INFO L82 PathProgramCache]: Analyzing trace with hash 1401497400, now seen corresponding path program 1 times [2021-08-21 18:34:32,437 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:32,437 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937057551] [2021-08-21 18:34:32,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:32,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:32,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:32,477 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:34:32,477 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:32,477 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937057551] [2021-08-21 18:34:32,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937057551] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:32,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852591631] [2021-08-21 18:34:32,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:32,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:32,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:32,481 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 18:34:32,504 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 18:34:32,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:32,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:34:32,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:32,804 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:34:32,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852591631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:32,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:32,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 18:34:32,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464266805] [2021-08-21 18:34:32,806 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:34:32,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:32,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:34:32,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:34:32,807 INFO L87 Difference]: Start difference. First operand 99 states and 197 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:32,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:32,869 INFO L93 Difference]: Finished difference Result 206 states and 383 transitions. [2021-08-21 18:34:32,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:34:32,869 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 18:34:32,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:32,871 INFO L225 Difference]: With dead ends: 206 [2021-08-21 18:34:32,871 INFO L226 Difference]: Without dead ends: 206 [2021-08-21 18:34:32,871 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 42.1ms TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:34:32,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-08-21 18:34:32,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2021-08-21 18:34:32,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 2.0616438356164384) internal successors, (301), 146 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:32,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 301 transitions. [2021-08-21 18:34:32,881 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 301 transitions. Word has length 24 [2021-08-21 18:34:32,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:32,882 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 301 transitions. [2021-08-21 18:34:32,882 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:32,882 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 301 transitions. [2021-08-21 18:34:32,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:34:32,883 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:32,884 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:32,902 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 18:34:33,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:33,100 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:33,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:33,101 INFO L82 PathProgramCache]: Analyzing trace with hash -448250184, now seen corresponding path program 6 times [2021-08-21 18:34:33,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:33,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198462704] [2021-08-21 18:34:33,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:33,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:33,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:33,142 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:33,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:33,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198462704] [2021-08-21 18:34:33,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1198462704] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:33,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594445747] [2021-08-21 18:34:33,142 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:34:33,142 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:33,142 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:33,143 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 18:34:33,144 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 18:34:33,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:34:33,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:33,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:34:33,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:33,507 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:33,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594445747] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:33,507 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:33,507 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 18:34:33,507 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321465130] [2021-08-21 18:34:33,507 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:34:33,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:33,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:34:33,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:34:33,508 INFO L87 Difference]: Start difference. First operand 147 states and 301 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:33,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:33,623 INFO L93 Difference]: Finished difference Result 230 states and 441 transitions. [2021-08-21 18:34:33,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:34:33,623 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 18:34:33,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:33,624 INFO L225 Difference]: With dead ends: 230 [2021-08-21 18:34:33,624 INFO L226 Difference]: Without dead ends: 218 [2021-08-21 18:34:33,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 106.4ms TimeCoverageRelationStatistics Valid=89, Invalid=253, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:34:33,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-08-21 18:34:33,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 183. [2021-08-21 18:34:33,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.043956043956044) internal successors, (372), 182 states have internal predecessors, (372), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:33,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 372 transitions. [2021-08-21 18:34:33,628 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 372 transitions. Word has length 24 [2021-08-21 18:34:33,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:33,628 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 372 transitions. [2021-08-21 18:34:33,628 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:33,628 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 372 transitions. [2021-08-21 18:34:33,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:34:33,628 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:33,628 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:33,649 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 18:34:33,849 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:33,850 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:33,850 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:33,850 INFO L82 PathProgramCache]: Analyzing trace with hash 605470520, now seen corresponding path program 2 times [2021-08-21 18:34:33,850 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:33,850 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323327915] [2021-08-21 18:34:33,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:33,850 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:33,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:33,880 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:34:33,880 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:33,880 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323327915] [2021-08-21 18:34:33,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323327915] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:33,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [641000004] [2021-08-21 18:34:33,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:34:33,881 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:33,881 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:33,881 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 18:34:33,923 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 18:34:34,121 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:34:34,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:34,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:34:34,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:34,220 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:34:34,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [641000004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:34,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:34,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-08-21 18:34:34,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552052080] [2021-08-21 18:34:34,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:34:34,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:34,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:34:34,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:34:34,222 INFO L87 Difference]: Start difference. First operand 183 states and 372 transitions. Second operand has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:34,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:34,340 INFO L93 Difference]: Finished difference Result 221 states and 420 transitions. [2021-08-21 18:34:34,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:34:34,341 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 18:34:34,341 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:34,342 INFO L225 Difference]: With dead ends: 221 [2021-08-21 18:34:34,342 INFO L226 Difference]: Without dead ends: 221 [2021-08-21 18:34:34,342 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 21 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 66.5ms TimeCoverageRelationStatistics Valid=53, Invalid=79, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:34:34,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2021-08-21 18:34:34,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 171. [2021-08-21 18:34:34,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 2.0058823529411764) internal successors, (341), 170 states have internal predecessors, (341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:34,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 341 transitions. [2021-08-21 18:34:34,346 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 341 transitions. Word has length 24 [2021-08-21 18:34:34,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:34,346 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 341 transitions. [2021-08-21 18:34:34,346 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 4.0) internal successors, (32), 8 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:34,346 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 341 transitions. [2021-08-21 18:34:34,348 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:34:34,348 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:34,348 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:34,365 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-08-21 18:34:34,560 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-08-21 18:34:34,561 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:34,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:34,561 INFO L82 PathProgramCache]: Analyzing trace with hash 60653496, now seen corresponding path program 7 times [2021-08-21 18:34:34,561 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:34,561 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438098431] [2021-08-21 18:34:34,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:34,562 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:34,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:34,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:34,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438098431] [2021-08-21 18:34:34,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438098431] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:34,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184653836] [2021-08-21 18:34:34,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:34:34,613 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:34,614 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:34,614 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 18:34:34,615 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 18:34:34,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:34,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:34:34,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:34,973 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:34,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184653836] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:34,974 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:34,974 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 18:34:34,974 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982903229] [2021-08-21 18:34:34,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:34:34,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:34,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:34:34,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:34:34,975 INFO L87 Difference]: Start difference. First operand 171 states and 341 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:35,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:35,526 INFO L93 Difference]: Finished difference Result 577 states and 984 transitions. [2021-08-21 18:34:35,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 18:34:35,527 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 18:34:35,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:35,529 INFO L225 Difference]: With dead ends: 577 [2021-08-21 18:34:35,529 INFO L226 Difference]: Without dead ends: 577 [2021-08-21 18:34:35,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 694 ImplicationChecksByTransitivity, 373.4ms TimeCoverageRelationStatistics Valid=490, Invalid=1580, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:34:35,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 577 states. [2021-08-21 18:34:35,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 577 to 183. [2021-08-21 18:34:35,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 2.0549450549450547) internal successors, (374), 182 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:35,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 374 transitions. [2021-08-21 18:34:35,535 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 374 transitions. Word has length 24 [2021-08-21 18:34:35,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:35,535 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 374 transitions. [2021-08-21 18:34:35,535 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:35,535 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 374 transitions. [2021-08-21 18:34:35,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:34:35,536 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:35,536 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:35,555 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 18:34:35,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:35,745 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:35,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:35,745 INFO L82 PathProgramCache]: Analyzing trace with hash 318475960, now seen corresponding path program 8 times [2021-08-21 18:34:35,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:35,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160753543] [2021-08-21 18:34:35,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:35,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:35,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:35,791 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:35,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:35,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160753543] [2021-08-21 18:34:35,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160753543] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:35,791 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873654355] [2021-08-21 18:34:35,791 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:34:35,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:35,792 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:35,792 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 18:34:35,797 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 18:34:36,031 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:34:36,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:36,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:34:36,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:36,192 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:36,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873654355] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:36,192 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:36,193 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 18:34:36,193 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1736390815] [2021-08-21 18:34:36,193 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:34:36,193 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:36,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:34:36,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:34:36,194 INFO L87 Difference]: Start difference. First operand 183 states and 374 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:36,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:36,385 INFO L93 Difference]: Finished difference Result 355 states and 658 transitions. [2021-08-21 18:34:36,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:34:36,386 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 18:34:36,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:36,387 INFO L225 Difference]: With dead ends: 355 [2021-08-21 18:34:36,387 INFO L226 Difference]: Without dead ends: 351 [2021-08-21 18:34:36,387 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 164.1ms TimeCoverageRelationStatistics Valid=147, Invalid=405, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:34:36,388 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 351 states. [2021-08-21 18:34:36,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 351 to 240. [2021-08-21 18:34:36,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 2.1171548117154813) internal successors, (506), 239 states have internal predecessors, (506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:36,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 506 transitions. [2021-08-21 18:34:36,393 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 506 transitions. Word has length 24 [2021-08-21 18:34:36,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:36,393 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 506 transitions. [2021-08-21 18:34:36,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 12 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:36,393 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 506 transitions. [2021-08-21 18:34:36,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:34:36,394 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:36,394 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:36,411 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 18:34:36,604 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 18:34:36,605 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:36,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:36,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1253908808, now seen corresponding path program 9 times [2021-08-21 18:34:36,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:36,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497443807] [2021-08-21 18:34:36,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:36,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:36,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:36,650 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:36,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:36,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497443807] [2021-08-21 18:34:36,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497443807] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:36,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824881383] [2021-08-21 18:34:36,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:34:36,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:36,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:36,652 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 18:34:36,652 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 18:34:36,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:34:36,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:36,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:34:36,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:37,040 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:37,040 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [824881383] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:37,040 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:37,040 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-08-21 18:34:37,040 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892200953] [2021-08-21 18:34:37,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:34:37,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:37,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:34:37,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:34:37,041 INFO L87 Difference]: Start difference. First operand 240 states and 506 transitions. Second operand has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:37,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:37,307 INFO L93 Difference]: Finished difference Result 370 states and 706 transitions. [2021-08-21 18:34:37,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:34:37,308 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 18:34:37,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:37,309 INFO L225 Difference]: With dead ends: 370 [2021-08-21 18:34:37,309 INFO L226 Difference]: Without dead ends: 370 [2021-08-21 18:34:37,311 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 193.9ms TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:34:37,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-08-21 18:34:37,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 253. [2021-08-21 18:34:37,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 2.0952380952380953) internal successors, (528), 252 states have internal predecessors, (528), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:37,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 528 transitions. [2021-08-21 18:34:37,317 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 528 transitions. Word has length 24 [2021-08-21 18:34:37,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:37,317 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 528 transitions. [2021-08-21 18:34:37,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.769230769230769) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:37,317 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 528 transitions. [2021-08-21 18:34:37,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:34:37,318 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:37,318 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:37,335 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 18:34:37,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 18:34:37,529 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:37,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:37,529 INFO L82 PathProgramCache]: Analyzing trace with hash 351717368, now seen corresponding path program 3 times [2021-08-21 18:34:37,529 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:37,529 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965652189] [2021-08-21 18:34:37,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:37,529 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:37,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:37,570 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:34:37,571 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:37,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965652189] [2021-08-21 18:34:37,571 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965652189] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:37,571 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719233048] [2021-08-21 18:34:37,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:34:37,571 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:37,571 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:37,573 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 18:34:37,581 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 18:34:37,833 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-08-21 18:34:37,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:37,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 5 conjunts are in the unsatisfiable core [2021-08-21 18:34:37,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:37,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:34:37,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719233048] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:37,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:37,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 8 [2021-08-21 18:34:37,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784644222] [2021-08-21 18:34:37,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:34:37,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:37,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:34:37,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:34:37,926 INFO L87 Difference]: Start difference. First operand 253 states and 528 transitions. Second operand has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:38,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:38,035 INFO L93 Difference]: Finished difference Result 273 states and 566 transitions. [2021-08-21 18:34:38,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:34:38,036 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 18:34:38,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:38,037 INFO L225 Difference]: With dead ends: 273 [2021-08-21 18:34:38,037 INFO L226 Difference]: Without dead ends: 273 [2021-08-21 18:34:38,038 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 52.9ms TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:34:38,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2021-08-21 18:34:38,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 233. [2021-08-21 18:34:38,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 2.1293103448275863) internal successors, (494), 232 states have internal predecessors, (494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:38,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 494 transitions. [2021-08-21 18:34:38,045 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 494 transitions. Word has length 24 [2021-08-21 18:34:38,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:38,045 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 494 transitions. [2021-08-21 18:34:38,045 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 3.875) internal successors, (31), 8 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:38,045 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 494 transitions. [2021-08-21 18:34:38,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-08-21 18:34:38,046 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:38,047 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:38,066 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 18:34:38,260 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 18:34:38,261 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:38,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:38,261 INFO L82 PathProgramCache]: Analyzing trace with hash 648118904, now seen corresponding path program 10 times [2021-08-21 18:34:38,261 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:38,261 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372175188] [2021-08-21 18:34:38,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:38,262 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:38,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:38,307 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:38,307 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:38,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372175188] [2021-08-21 18:34:38,307 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [372175188] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:38,307 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217105297] [2021-08-21 18:34:38,307 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:34:38,307 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:38,307 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:38,308 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 18:34:38,321 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 18:34:38,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:34:38,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:38,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:34:38,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:38,714 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:38,714 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217105297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:38,714 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:38,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-08-21 18:34:38,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247974554] [2021-08-21 18:34:38,715 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:34:38,715 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:38,715 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:34:38,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:34:38,715 INFO L87 Difference]: Start difference. First operand 233 states and 494 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:38,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:38,994 INFO L93 Difference]: Finished difference Result 604 states and 1149 transitions. [2021-08-21 18:34:38,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:34:38,994 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-08-21 18:34:38,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:38,996 INFO L225 Difference]: With dead ends: 604 [2021-08-21 18:34:38,996 INFO L226 Difference]: Without dead ends: 604 [2021-08-21 18:34:38,996 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 194.8ms TimeCoverageRelationStatistics Valid=229, Invalid=641, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:34:38,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 604 states. [2021-08-21 18:34:39,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 604 to 283. [2021-08-21 18:34:39,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 2.1702127659574466) internal successors, (612), 282 states have internal predecessors, (612), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:39,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 612 transitions. [2021-08-21 18:34:39,003 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 612 transitions. Word has length 24 [2021-08-21 18:34:39,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:39,003 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 612 transitions. [2021-08-21 18:34:39,003 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:39,003 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 612 transitions. [2021-08-21 18:34:39,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:34:39,003 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:39,004 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:39,020 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 18:34:39,212 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 18:34:39,213 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:39,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:39,213 INFO L82 PathProgramCache]: Analyzing trace with hash 66299930, now seen corresponding path program 4 times [2021-08-21 18:34:39,213 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:39,213 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496888073] [2021-08-21 18:34:39,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:39,213 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:39,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:39,974 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 18:34:39,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:39,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496888073] [2021-08-21 18:34:39,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496888073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:39,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203174742] [2021-08-21 18:34:39,974 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:34:39,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:39,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:39,975 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 18:34:39,976 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 18:34:40,266 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:34:40,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:40,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 18:34:40,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:41,246 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:34:41,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-21 18:34:41,640 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 18:34:41,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203174742] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:41,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:41,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:34:41,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938366806] [2021-08-21 18:34:41,640 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:34:41,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:41,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:34:41,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:34:41,641 INFO L87 Difference]: Start difference. First operand 283 states and 612 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:42,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:42,236 INFO L93 Difference]: Finished difference Result 423 states and 858 transitions. [2021-08-21 18:34:42,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:34:42,237 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:34:42,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:42,238 INFO L225 Difference]: With dead ends: 423 [2021-08-21 18:34:42,238 INFO L226 Difference]: Without dead ends: 418 [2021-08-21 18:34:42,238 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 898.4ms TimeCoverageRelationStatistics Valid=128, Invalid=472, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:34:42,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 418 states. [2021-08-21 18:34:42,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 418 to 292. [2021-08-21 18:34:42,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 292 states, 291 states have (on average 2.178694158075601) internal successors, (634), 291 states have internal predecessors, (634), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:42,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 292 states to 292 states and 634 transitions. [2021-08-21 18:34:42,244 INFO L78 Accepts]: Start accepts. Automaton has 292 states and 634 transitions. Word has length 26 [2021-08-21 18:34:42,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:42,244 INFO L470 AbstractCegarLoop]: Abstraction has 292 states and 634 transitions. [2021-08-21 18:34:42,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:42,244 INFO L276 IsEmpty]: Start isEmpty. Operand 292 states and 634 transitions. [2021-08-21 18:34:42,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:34:42,245 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:42,245 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:42,277 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 18:34:42,456 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:42,457 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:42,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:42,457 INFO L82 PathProgramCache]: Analyzing trace with hash 320089054, now seen corresponding path program 5 times [2021-08-21 18:34:42,457 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:42,457 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1331090676] [2021-08-21 18:34:42,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:42,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:42,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:42,916 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 18:34:42,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:42,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1331090676] [2021-08-21 18:34:42,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1331090676] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:42,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665641288] [2021-08-21 18:34:42,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:34:42,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:42,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:42,917 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 18:34:42,918 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 18:34:43,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:34:43,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:43,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:34:43,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:44,201 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:34:44,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-21 18:34:44,743 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 18:34:44,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [665641288] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:44,743 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:44,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 18:34:44,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1884096751] [2021-08-21 18:34:44,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:34:44,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:44,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:34:44,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:34:44,745 INFO L87 Difference]: Start difference. First operand 292 states and 634 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:45,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:45,724 INFO L93 Difference]: Finished difference Result 415 states and 845 transitions. [2021-08-21 18:34:45,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:34:45,724 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:34:45,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:45,726 INFO L225 Difference]: With dead ends: 415 [2021-08-21 18:34:45,726 INFO L226 Difference]: Without dead ends: 410 [2021-08-21 18:34:45,726 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1208.0ms TimeCoverageRelationStatistics Valid=154, Invalid=716, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:34:45,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 410 states. [2021-08-21 18:34:45,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 410 to 296. [2021-08-21 18:34:45,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 2.169491525423729) internal successors, (640), 295 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:45,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 640 transitions. [2021-08-21 18:34:45,731 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 640 transitions. Word has length 26 [2021-08-21 18:34:45,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:45,731 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 640 transitions. [2021-08-21 18:34:45,731 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:45,731 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 640 transitions. [2021-08-21 18:34:45,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:34:45,732 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:45,732 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:45,751 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 18:34:45,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-08-21 18:34:45,945 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:45,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:45,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1783447654, now seen corresponding path program 11 times [2021-08-21 18:34:45,945 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:45,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103262522] [2021-08-21 18:34:45,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:45,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:45,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:46,493 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:46,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:46,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103262522] [2021-08-21 18:34:46,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103262522] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:46,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524460429] [2021-08-21 18:34:46,494 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:34:46,494 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:46,494 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:46,494 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 18:34:46,495 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 18:34:46,976 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:34:46,976 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:46,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 18:34:46,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:47,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:34:47,861 INFO L354 Elim1Store]: treesize reduction 44, result has 13.7 percent of original size [2021-08-21 18:34:47,862 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 130 treesize of output 84 [2021-08-21 18:34:48,055 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:34:48,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524460429] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:48,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:48,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 18:34:48,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587532381] [2021-08-21 18:34:48,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:34:48,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:48,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:34:48,057 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:34:48,057 INFO L87 Difference]: Start difference. First operand 296 states and 640 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:49,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:49,849 INFO L93 Difference]: Finished difference Result 351 states and 718 transitions. [2021-08-21 18:34:49,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:34:49,849 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:34:49,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:49,850 INFO L225 Difference]: With dead ends: 351 [2021-08-21 18:34:49,850 INFO L226 Difference]: Without dead ends: 346 [2021-08-21 18:34:49,851 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 1938.7ms TimeCoverageRelationStatistics Valid=192, Invalid=998, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:34:49,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-08-21 18:34:49,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 304. [2021-08-21 18:34:49,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 304 states, 303 states have (on average 2.155115511551155) internal successors, (653), 303 states have internal predecessors, (653), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:49,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 304 states to 304 states and 653 transitions. [2021-08-21 18:34:49,856 INFO L78 Accepts]: Start accepts. Automaton has 304 states and 653 transitions. Word has length 26 [2021-08-21 18:34:49,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:49,856 INFO L470 AbstractCegarLoop]: Abstraction has 304 states and 653 transitions. [2021-08-21 18:34:49,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:49,856 INFO L276 IsEmpty]: Start isEmpty. Operand 304 states and 653 transitions. [2021-08-21 18:34:49,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:34:49,857 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:49,857 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:49,877 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-08-21 18:34:50,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:50,077 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:50,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:50,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1596416026, now seen corresponding path program 6 times [2021-08-21 18:34:50,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:50,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417018180] [2021-08-21 18:34:50,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:50,078 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:50,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:50,592 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 18:34:50,593 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:50,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417018180] [2021-08-21 18:34:50,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417018180] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:50,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574306011] [2021-08-21 18:34:50,593 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:34:50,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:50,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:50,594 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 18:34:50,594 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 18:34:51,167 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:34:51,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:34:51,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:34:51,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:51,849 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:34:51,854 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:34:51,854 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-21 18:34:52,648 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 18:34:52,648 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574306011] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:52,648 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:52,648 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 18:34:52,648 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366361753] [2021-08-21 18:34:52,649 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:34:52,649 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:52,649 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:34:52,649 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:34:52,649 INFO L87 Difference]: Start difference. First operand 304 states and 653 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:55,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:55,047 INFO L93 Difference]: Finished difference Result 508 states and 997 transitions. [2021-08-21 18:34:55,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:34:55,048 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:34:55,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:55,049 INFO L225 Difference]: With dead ends: 508 [2021-08-21 18:34:55,049 INFO L226 Difference]: Without dead ends: 503 [2021-08-21 18:34:55,050 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 410 ImplicationChecksByTransitivity, 2251.6ms TimeCoverageRelationStatistics Valid=235, Invalid=1325, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:34:55,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-08-21 18:34:55,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 310. [2021-08-21 18:34:55,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 310 states, 309 states have (on average 2.168284789644013) internal successors, (670), 309 states have internal predecessors, (670), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:55,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 310 states to 310 states and 670 transitions. [2021-08-21 18:34:55,055 INFO L78 Accepts]: Start accepts. Automaton has 310 states and 670 transitions. Word has length 26 [2021-08-21 18:34:55,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:55,055 INFO L470 AbstractCegarLoop]: Abstraction has 310 states and 670 transitions. [2021-08-21 18:34:55,056 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:55,056 INFO L276 IsEmpty]: Start isEmpty. Operand 310 states and 670 transitions. [2021-08-21 18:34:55,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:34:55,056 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:55,056 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:55,075 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 18:34:55,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:55,272 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:55,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:55,272 INFO L82 PathProgramCache]: Analyzing trace with hash -729726950, now seen corresponding path program 7 times [2021-08-21 18:34:55,272 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:55,272 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340129817] [2021-08-21 18:34:55,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:55,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:55,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:55,696 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 18:34:55,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:55,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340129817] [2021-08-21 18:34:55,697 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340129817] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:55,697 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218975749] [2021-08-21 18:34:55,697 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:34:55,697 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:55,697 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:55,697 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 18:34:55,701 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 18:34:56,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:56,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 18:34:56,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:34:57,303 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:34:57,303 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-21 18:34:57,693 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 18:34:57,693 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218975749] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:57,693 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:34:57,693 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:34:57,694 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849930876] [2021-08-21 18:34:57,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:34:57,694 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:34:57,694 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:34:57,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:34:57,694 INFO L87 Difference]: Start difference. First operand 310 states and 670 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:58,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:34:58,824 INFO L93 Difference]: Finished difference Result 484 states and 972 transitions. [2021-08-21 18:34:58,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:34:58,825 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:34:58,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:34:58,826 INFO L225 Difference]: With dead ends: 484 [2021-08-21 18:34:58,826 INFO L226 Difference]: Without dead ends: 479 [2021-08-21 18:34:58,826 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1297.2ms TimeCoverageRelationStatistics Valid=202, Invalid=790, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:34:58,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 479 states. [2021-08-21 18:34:58,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 479 to 314. [2021-08-21 18:34:58,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.1725239616613417) internal successors, (680), 313 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:58,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 680 transitions. [2021-08-21 18:34:58,833 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 680 transitions. Word has length 26 [2021-08-21 18:34:58,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:34:58,833 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 680 transitions. [2021-08-21 18:34:58,833 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:34:58,833 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 680 transitions. [2021-08-21 18:34:58,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:34:58,833 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:34:58,833 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:34:58,853 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 18:34:59,044 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:59,045 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:34:59,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:34:59,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1992855578, now seen corresponding path program 8 times [2021-08-21 18:34:59,045 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:34:59,045 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437283967] [2021-08-21 18:34:59,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:34:59,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:34:59,053 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:34:59,479 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 18:34:59,480 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:34:59,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437283967] [2021-08-21 18:34:59,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1437283967] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:34:59,480 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398480060] [2021-08-21 18:34:59,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:34:59,480 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:34:59,480 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:34:59,481 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 18:34:59,483 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 18:35:00,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:35:00,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:00,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:35:00,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:00,922 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:35:00,923 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:35:00,923 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 18:35:00,932 INFO L354 Elim1Store]: treesize reduction 11, result has 47.6 percent of original size [2021-08-21 18:35:00,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 156 treesize of output 110 [2021-08-21 18:35:02,076 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 18:35:02,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398480060] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:02,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:02,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:35:02,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1542657241] [2021-08-21 18:35:02,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:35:02,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:02,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:35:02,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:35:02,077 INFO L87 Difference]: Start difference. First operand 314 states and 680 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:03,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:03,966 INFO L93 Difference]: Finished difference Result 534 states and 1070 transitions. [2021-08-21 18:35:03,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:35:03,967 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:03,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:03,968 INFO L225 Difference]: With dead ends: 534 [2021-08-21 18:35:03,968 INFO L226 Difference]: Without dead ends: 529 [2021-08-21 18:35:03,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 369 ImplicationChecksByTransitivity, 1939.8ms TimeCoverageRelationStatistics Valid=280, Invalid=1052, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:35:03,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-08-21 18:35:03,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 315. [2021-08-21 18:35:03,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 315 states, 314 states have (on average 2.1687898089171975) internal successors, (681), 314 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:03,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 315 states to 315 states and 681 transitions. [2021-08-21 18:35:03,974 INFO L78 Accepts]: Start accepts. Automaton has 315 states and 681 transitions. Word has length 26 [2021-08-21 18:35:03,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:03,974 INFO L470 AbstractCegarLoop]: Abstraction has 315 states and 681 transitions. [2021-08-21 18:35:03,974 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:03,974 INFO L276 IsEmpty]: Start isEmpty. Operand 315 states and 681 transitions. [2021-08-21 18:35:03,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:03,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:03,975 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:04,000 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 18:35:04,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:04,194 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:04,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:04,194 INFO L82 PathProgramCache]: Analyzing trace with hash -121398562, now seen corresponding path program 9 times [2021-08-21 18:35:04,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:04,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847075144] [2021-08-21 18:35:04,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:04,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:04,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:04,612 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 18:35:04,612 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:04,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847075144] [2021-08-21 18:35:04,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847075144] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:04,612 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127150486] [2021-08-21 18:35:04,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:35:04,612 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:04,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:04,613 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 18:35:04,613 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 18:35:05,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:35:05,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:05,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 18:35:05,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:06,210 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 18:35:06,211 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-21 18:35:07,358 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 18:35:07,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127150486] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:07,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:07,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:35:07,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888456307] [2021-08-21 18:35:07,359 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:35:07,359 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:07,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:35:07,359 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:35:07,360 INFO L87 Difference]: Start difference. First operand 315 states and 681 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:08,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:08,913 INFO L93 Difference]: Finished difference Result 496 states and 996 transitions. [2021-08-21 18:35:08,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:35:08,913 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:08,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:08,915 INFO L225 Difference]: With dead ends: 496 [2021-08-21 18:35:08,915 INFO L226 Difference]: Without dead ends: 491 [2021-08-21 18:35:08,915 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 1587.9ms TimeCoverageRelationStatistics Valid=282, Invalid=1050, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:35:08,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 491 states. [2021-08-21 18:35:08,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 491 to 316. [2021-08-21 18:35:08,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 316 states, 315 states have (on average 2.165079365079365) internal successors, (682), 315 states have internal predecessors, (682), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:08,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 316 states to 316 states and 682 transitions. [2021-08-21 18:35:08,921 INFO L78 Accepts]: Start accepts. Automaton has 316 states and 682 transitions. Word has length 26 [2021-08-21 18:35:08,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:08,921 INFO L470 AbstractCegarLoop]: Abstraction has 316 states and 682 transitions. [2021-08-21 18:35:08,921 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:08,921 INFO L276 IsEmpty]: Start isEmpty. Operand 316 states and 682 transitions. [2021-08-21 18:35:08,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:08,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:08,922 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:08,943 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:09,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-08-21 18:35:09,137 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:09,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:09,137 INFO L82 PathProgramCache]: Analyzing trace with hash -1016721510, now seen corresponding path program 12 times [2021-08-21 18:35:09,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:09,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180782333] [2021-08-21 18:35:09,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:09,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:09,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:09,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:09,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:09,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180782333] [2021-08-21 18:35:09,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180782333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:09,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671725811] [2021-08-21 18:35:09,769 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:35:09,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:09,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:09,770 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 18:35:09,772 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 18:35:10,771 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:35:10,771 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:10,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 18:35:10,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:11,702 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 18:35:11,702 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 118 treesize of output 102 [2021-08-21 18:35:12,676 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:12,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1671725811] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:12,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:12,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2021-08-21 18:35:12,677 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530206996] [2021-08-21 18:35:12,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:35:12,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:12,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:35:12,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=359, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:35:12,677 INFO L87 Difference]: Start difference. First operand 316 states and 682 transitions. Second operand has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:15,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:15,572 INFO L93 Difference]: Finished difference Result 412 states and 822 transitions. [2021-08-21 18:35:15,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:35:15,572 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:15,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:15,574 INFO L225 Difference]: With dead ends: 412 [2021-08-21 18:35:15,574 INFO L226 Difference]: Without dead ends: 407 [2021-08-21 18:35:15,574 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 2953.5ms TimeCoverageRelationStatistics Valid=330, Invalid=1832, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:35:15,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 407 states. [2021-08-21 18:35:15,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 407 to 314. [2021-08-21 18:35:15,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 314 states, 313 states have (on average 2.159744408945687) internal successors, (676), 313 states have internal predecessors, (676), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:15,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 314 states to 314 states and 676 transitions. [2021-08-21 18:35:15,579 INFO L78 Accepts]: Start accepts. Automaton has 314 states and 676 transitions. Word has length 26 [2021-08-21 18:35:15,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:15,579 INFO L470 AbstractCegarLoop]: Abstraction has 314 states and 676 transitions. [2021-08-21 18:35:15,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.4285714285714284) internal successors, (51), 21 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:15,579 INFO L276 IsEmpty]: Start isEmpty. Operand 314 states and 676 transitions. [2021-08-21 18:35:15,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:15,580 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:15,580 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:15,603 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 18:35:15,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 18:35:15,797 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:15,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:15,797 INFO L82 PathProgramCache]: Analyzing trace with hash 1705861018, now seen corresponding path program 13 times [2021-08-21 18:35:15,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:15,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [406860843] [2021-08-21 18:35:15,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:15,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:16,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:16,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:16,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [406860843] [2021-08-21 18:35:16,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [406860843] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:16,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261236903] [2021-08-21 18:35:16,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:35:16,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:16,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:16,396 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 18:35:16,397 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 18:35:17,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:17,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:35:17,478 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:18,067 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 18:35:18,068 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 100 [2021-08-21 18:35:19,440 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:19,440 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261236903] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:19,440 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:19,440 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-08-21 18:35:19,440 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103923413] [2021-08-21 18:35:19,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:35:19,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:19,441 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:35:19,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:35:19,441 INFO L87 Difference]: Start difference. First operand 314 states and 676 transitions. Second operand has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 18:35:24,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:24,188 INFO L93 Difference]: Finished difference Result 715 states and 1410 transitions. [2021-08-21 18:35:24,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 18:35:24,189 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:24,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:24,191 INFO L225 Difference]: With dead ends: 715 [2021-08-21 18:35:24,191 INFO L226 Difference]: Without dead ends: 695 [2021-08-21 18:35:24,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1194 ImplicationChecksByTransitivity, 4659.0ms TimeCoverageRelationStatistics Valid=782, Invalid=3124, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 18:35:24,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-08-21 18:35:24,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 325. [2021-08-21 18:35:24,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 325 states, 324 states have (on average 2.175925925925926) internal successors, (705), 324 states have internal predecessors, (705), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:24,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 325 states to 325 states and 705 transitions. [2021-08-21 18:35:24,198 INFO L78 Accepts]: Start accepts. Automaton has 325 states and 705 transitions. Word has length 26 [2021-08-21 18:35:24,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:24,198 INFO L470 AbstractCegarLoop]: Abstraction has 325 states and 705 transitions. [2021-08-21 18:35:24,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.263157894736842) internal successors, (43), 18 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 18:35:24,198 INFO L276 IsEmpty]: Start isEmpty. Operand 325 states and 705 transitions. [2021-08-21 18:35:24,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:24,199 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:24,199 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:24,265 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:24,399 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:24,399 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:24,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:24,400 INFO L82 PathProgramCache]: Analyzing trace with hash -983480102, now seen corresponding path program 10 times [2021-08-21 18:35:24,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:24,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2031536211] [2021-08-21 18:35:24,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:24,400 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:24,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:24,841 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 18:35:24,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:24,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2031536211] [2021-08-21 18:35:24,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2031536211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:24,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756054931] [2021-08-21 18:35:24,842 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:35:24,842 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:24,842 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:24,843 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 18:35:24,843 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 18:35:25,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:35:25,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:25,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:35:25,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:26,863 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:35:26,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-21 18:35:27,249 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 18:35:27,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1756054931] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:27,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:27,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:35:27,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835576104] [2021-08-21 18:35:27,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:35:27,250 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:27,250 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:35:27,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:35:27,251 INFO L87 Difference]: Start difference. First operand 325 states and 705 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:27,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:27,897 INFO L93 Difference]: Finished difference Result 458 states and 949 transitions. [2021-08-21 18:35:27,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:35:27,901 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:27,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:27,903 INFO L225 Difference]: With dead ends: 458 [2021-08-21 18:35:27,903 INFO L226 Difference]: Without dead ends: 453 [2021-08-21 18:35:27,903 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 799.9ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:35:27,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-08-21 18:35:27,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 333. [2021-08-21 18:35:27,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 2.1716867469879517) internal successors, (721), 332 states have internal predecessors, (721), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:27,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 721 transitions. [2021-08-21 18:35:27,909 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 721 transitions. Word has length 26 [2021-08-21 18:35:27,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:27,909 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 721 transitions. [2021-08-21 18:35:27,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:27,909 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 721 transitions. [2021-08-21 18:35:27,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:27,910 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:27,910 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:27,929 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:28,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:28,123 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:28,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:28,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1739102426, now seen corresponding path program 11 times [2021-08-21 18:35:28,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:28,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666836009] [2021-08-21 18:35:28,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:28,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:28,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:28,504 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 18:35:28,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:28,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666836009] [2021-08-21 18:35:28,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666836009] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:28,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1517177636] [2021-08-21 18:35:28,504 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:35:28,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:28,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:28,505 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 18:35:28,506 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 18:35:29,753 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:35:29,753 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:29,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:35:29,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:30,388 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 18:35:30,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 84 [2021-08-21 18:35:31,474 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 18:35:31,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1517177636] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:31,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:31,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 18:35:31,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860946836] [2021-08-21 18:35:31,475 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:35:31,475 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:31,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:35:31,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:35:31,475 INFO L87 Difference]: Start difference. First operand 333 states and 721 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:33,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:33,345 INFO L93 Difference]: Finished difference Result 530 states and 1080 transitions. [2021-08-21 18:35:33,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:35:33,346 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:33,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:33,347 INFO L225 Difference]: With dead ends: 530 [2021-08-21 18:35:33,347 INFO L226 Difference]: Without dead ends: 525 [2021-08-21 18:35:33,348 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 1897.0ms TimeCoverageRelationStatistics Valid=253, Invalid=1153, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:35:33,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 525 states. [2021-08-21 18:35:33,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 525 to 335. [2021-08-21 18:35:33,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 2.1736526946107784) internal successors, (726), 334 states have internal predecessors, (726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:33,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 726 transitions. [2021-08-21 18:35:33,353 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 726 transitions. Word has length 26 [2021-08-21 18:35:33,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:33,353 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 726 transitions. [2021-08-21 18:35:33,353 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:33,353 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 726 transitions. [2021-08-21 18:35:33,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:33,354 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:33,354 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:33,374 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:33,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-08-21 18:35:33,557 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:33,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:33,557 INFO L82 PathProgramCache]: Analyzing trace with hash -2052596322, now seen corresponding path program 12 times [2021-08-21 18:35:33,557 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:33,557 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [765726573] [2021-08-21 18:35:33,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:33,557 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:33,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:33,891 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 18:35:33,891 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:33,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [765726573] [2021-08-21 18:35:33,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [765726573] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:33,891 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980135877] [2021-08-21 18:35:33,891 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:35:33,892 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:33,892 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:33,892 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 18:35:33,893 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 18:35:35,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:35:35,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:35,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:35:35,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:35,810 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 18:35:35,810 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 77 [2021-08-21 18:35:36,856 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 18:35:36,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980135877] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:36,856 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:36,857 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:35:36,857 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926248670] [2021-08-21 18:35:36,857 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:35:36,857 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:36,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:35:36,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=241, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:35:36,857 INFO L87 Difference]: Start difference. First operand 335 states and 726 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:37,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:37,627 INFO L93 Difference]: Finished difference Result 469 states and 977 transitions. [2021-08-21 18:35:37,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:35:37,628 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:37,628 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:37,629 INFO L225 Difference]: With dead ends: 469 [2021-08-21 18:35:37,629 INFO L226 Difference]: Without dead ends: 464 [2021-08-21 18:35:37,629 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 835.4ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:35:37,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-08-21 18:35:37,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 338. [2021-08-21 18:35:37,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 338 states, 337 states have (on average 2.1839762611275964) internal successors, (736), 337 states have internal predecessors, (736), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:37,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 338 states to 338 states and 736 transitions. [2021-08-21 18:35:37,634 INFO L78 Accepts]: Start accepts. Automaton has 338 states and 736 transitions. Word has length 26 [2021-08-21 18:35:37,634 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:37,635 INFO L470 AbstractCegarLoop]: Abstraction has 338 states and 736 transitions. [2021-08-21 18:35:37,635 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:37,635 INFO L276 IsEmpty]: Start isEmpty. Operand 338 states and 736 transitions. [2021-08-21 18:35:37,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:37,635 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:37,635 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:37,672 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:37,848 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 18:35:37,849 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:37,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:37,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1125002074, now seen corresponding path program 13 times [2021-08-21 18:35:37,849 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:37,849 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632097933] [2021-08-21 18:35:37,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:37,849 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:37,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:38,232 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 18:35:38,232 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:38,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632097933] [2021-08-21 18:35:38,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632097933] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:38,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107867203] [2021-08-21 18:35:38,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:35:38,232 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:38,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:38,233 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 18:35:38,233 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 18:35:39,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:39,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:35:39,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:40,209 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:35:40,210 INFO L173 IndexEqualityManager]: detected equality via solver [2021-08-21 18:35:40,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:35:40,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 91 treesize of output 69 [2021-08-21 18:35:41,341 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 18:35:41,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107867203] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:41,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:41,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 18:35:41,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497033360] [2021-08-21 18:35:41,342 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:35:41,342 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:41,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:35:41,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:35:41,342 INFO L87 Difference]: Start difference. First operand 338 states and 736 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:42,595 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:42,596 INFO L93 Difference]: Finished difference Result 498 states and 1027 transitions. [2021-08-21 18:35:42,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:35:42,597 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:42,597 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:42,598 INFO L225 Difference]: With dead ends: 498 [2021-08-21 18:35:42,598 INFO L226 Difference]: Without dead ends: 488 [2021-08-21 18:35:42,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 1328.1ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:35:42,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 488 states. [2021-08-21 18:35:42,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 488 to 347. [2021-08-21 18:35:42,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 2.1965317919075145) internal successors, (760), 346 states have internal predecessors, (760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:42,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 760 transitions. [2021-08-21 18:35:42,604 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 760 transitions. Word has length 26 [2021-08-21 18:35:42,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:42,604 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 760 transitions. [2021-08-21 18:35:42,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:42,604 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 760 transitions. [2021-08-21 18:35:42,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:42,605 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:42,605 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:42,625 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-08-21 18:35:42,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 18:35:42,817 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:42,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:42,817 INFO L82 PathProgramCache]: Analyzing trace with hash 1758141146, now seen corresponding path program 14 times [2021-08-21 18:35:42,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:42,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691566697] [2021-08-21 18:35:42,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:42,817 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:42,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:43,318 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 18:35:43,318 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:43,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691566697] [2021-08-21 18:35:43,318 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691566697] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:43,318 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910240659] [2021-08-21 18:35:43,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:35:43,318 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:43,318 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:43,320 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 18:35:43,321 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 18:35:44,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:35:44,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:44,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:35:44,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:45,804 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:35:45,805 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 94 [2021-08-21 18:35:47,883 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 18:35:47,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910240659] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:47,884 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:47,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 18:35:47,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960655444] [2021-08-21 18:35:47,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:35:47,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:47,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:35:47,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=313, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:35:47,885 INFO L87 Difference]: Start difference. First operand 347 states and 760 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:50,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:50,719 INFO L93 Difference]: Finished difference Result 555 states and 1122 transitions. [2021-08-21 18:35:50,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:35:50,719 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:50,719 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:50,721 INFO L225 Difference]: With dead ends: 555 [2021-08-21 18:35:50,721 INFO L226 Difference]: Without dead ends: 545 [2021-08-21 18:35:50,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 2951.4ms TimeCoverageRelationStatistics Valid=242, Invalid=1240, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:35:50,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-08-21 18:35:50,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 354. [2021-08-21 18:35:50,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.218130311614731) internal successors, (783), 353 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:50,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 783 transitions. [2021-08-21 18:35:50,727 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 783 transitions. Word has length 26 [2021-08-21 18:35:50,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:50,727 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 783 transitions. [2021-08-21 18:35:50,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:50,727 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 783 transitions. [2021-08-21 18:35:50,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:50,728 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:50,728 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:50,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-08-21 18:35:50,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:50,944 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:50,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:50,944 INFO L82 PathProgramCache]: Analyzing trace with hash -429256102, now seen corresponding path program 14 times [2021-08-21 18:35:50,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:50,945 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812285796] [2021-08-21 18:35:50,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:50,945 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:50,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:51,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:51,526 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:51,526 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812285796] [2021-08-21 18:35:51,527 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812285796] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:51,527 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681401848] [2021-08-21 18:35:51,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:35:51,527 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:51,527 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:51,534 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 18:35:51,535 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 18:35:53,253 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:35:53,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:53,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:35:53,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:54,117 INFO L354 Elim1Store]: treesize reduction 40, result has 14.9 percent of original size [2021-08-21 18:35:54,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 82 [2021-08-21 18:35:54,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:54,287 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681401848] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:54,287 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:35:54,287 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 9] total 18 [2021-08-21 18:35:54,287 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995597313] [2021-08-21 18:35:54,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:35:54,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:35:54,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:35:54,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:35:54,288 INFO L87 Difference]: Start difference. First operand 354 states and 783 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 18:35:56,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:35:56,297 INFO L93 Difference]: Finished difference Result 411 states and 861 transitions. [2021-08-21 18:35:56,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:35:56,298 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:35:56,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:35:56,299 INFO L225 Difference]: With dead ends: 411 [2021-08-21 18:35:56,299 INFO L226 Difference]: Without dead ends: 406 [2021-08-21 18:35:56,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 2079.2ms TimeCoverageRelationStatistics Valid=350, Invalid=1720, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:35:56,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 406 states. [2021-08-21 18:35:56,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 406 to 354. [2021-08-21 18:35:56,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 354 states, 353 states have (on average 2.218130311614731) internal successors, (783), 353 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:35:56,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 354 states to 354 states and 783 transitions. [2021-08-21 18:35:56,311 INFO L78 Accepts]: Start accepts. Automaton has 354 states and 783 transitions. Word has length 26 [2021-08-21 18:35:56,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:35:56,311 INFO L470 AbstractCegarLoop]: Abstraction has 354 states and 783 transitions. [2021-08-21 18:35:56,311 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 18 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 18:35:56,311 INFO L276 IsEmpty]: Start isEmpty. Operand 354 states and 783 transitions. [2021-08-21 18:35:56,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:35:56,312 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:35:56,312 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:35:56,338 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-08-21 18:35:56,536 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:56,537 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:35:56,537 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:35:56,537 INFO L82 PathProgramCache]: Analyzing trace with hash -1920751014, now seen corresponding path program 15 times [2021-08-21 18:35:56,537 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:35:56,537 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45278311] [2021-08-21 18:35:56,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:35:56,537 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:35:56,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:35:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:35:57,017 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:35:57,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45278311] [2021-08-21 18:35:57,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45278311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:35:57,017 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [42607504] [2021-08-21 18:35:57,017 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:35:57,017 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:35:57,017 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:35:57,018 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 18:35:57,019 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 18:35:58,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:35:58,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:35:58,827 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 18:35:58,828 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:35:59,510 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:35:59,536 INFO L354 Elim1Store]: treesize reduction 22, result has 56.9 percent of original size [2021-08-21 18:35:59,537 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 130 treesize of output 106 [2021-08-21 18:36:00,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:00,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [42607504] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:00,713 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:00,714 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 11] total 22 [2021-08-21 18:36:00,714 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656498726] [2021-08-21 18:36:00,714 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:36:00,714 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:00,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:36:00,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=389, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:36:00,714 INFO L87 Difference]: Start difference. First operand 354 states and 783 transitions. Second operand has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 18:36:02,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:02,451 INFO L93 Difference]: Finished difference Result 549 states and 1124 transitions. [2021-08-21 18:36:02,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:36:02,451 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:36:02,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:02,453 INFO L225 Difference]: With dead ends: 549 [2021-08-21 18:36:02,453 INFO L226 Difference]: Without dead ends: 539 [2021-08-21 18:36:02,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1764.1ms TimeCoverageRelationStatistics Valid=404, Invalid=2248, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 18:36:02,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 539 states. [2021-08-21 18:36:02,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 539 to 369. [2021-08-21 18:36:02,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 369 states, 368 states have (on average 2.220108695652174) internal successors, (817), 368 states have internal predecessors, (817), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:02,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 369 states to 369 states and 817 transitions. [2021-08-21 18:36:02,459 INFO L78 Accepts]: Start accepts. Automaton has 369 states and 817 transitions. Word has length 26 [2021-08-21 18:36:02,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:02,459 INFO L470 AbstractCegarLoop]: Abstraction has 369 states and 817 transitions. [2021-08-21 18:36:02,459 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.3181818181818183) internal successors, (51), 22 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 18:36:02,459 INFO L276 IsEmpty]: Start isEmpty. Operand 369 states and 817 transitions. [2021-08-21 18:36:02,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:36:02,460 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:02,460 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:36:02,488 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 18:36:02,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:02,673 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:02,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:02,673 INFO L82 PathProgramCache]: Analyzing trace with hash -2001640870, now seen corresponding path program 16 times [2021-08-21 18:36:02,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:02,673 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288377886] [2021-08-21 18:36:02,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:02,673 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:02,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:03,155 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:03,155 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:03,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288377886] [2021-08-21 18:36:03,155 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288377886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:03,155 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2050656534] [2021-08-21 18:36:03,155 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:36:03,155 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:03,155 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:03,156 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 18:36:03,157 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 18:36:05,039 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:36:05,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:05,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:36:05,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:05,584 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:36:05,607 INFO L354 Elim1Store]: treesize reduction 16, result has 64.4 percent of original size [2021-08-21 18:36:05,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 129 treesize of output 111 [2021-08-21 18:36:06,883 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:06,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2050656534] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:06,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:06,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 18 [2021-08-21 18:36:06,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280323558] [2021-08-21 18:36:06,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:36:06,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:06,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:36:06,884 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:36:06,884 INFO L87 Difference]: Start difference. First operand 369 states and 817 transitions. Second operand has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 18:36:09,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:09,745 INFO L93 Difference]: Finished difference Result 742 states and 1527 transitions. [2021-08-21 18:36:09,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 18:36:09,745 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 26 [2021-08-21 18:36:09,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:09,747 INFO L225 Difference]: With dead ends: 742 [2021-08-21 18:36:09,747 INFO L226 Difference]: Without dead ends: 726 [2021-08-21 18:36:09,748 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 693 ImplicationChecksByTransitivity, 2802.2ms TimeCoverageRelationStatistics Valid=527, Invalid=2023, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:36:09,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 726 states. [2021-08-21 18:36:09,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 726 to 414. [2021-08-21 18:36:09,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.2445520581113803) internal successors, (927), 413 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:09,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 927 transitions. [2021-08-21 18:36:09,755 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 927 transitions. Word has length 26 [2021-08-21 18:36:09,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:09,755 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 927 transitions. [2021-08-21 18:36:09,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.3157894736842106) internal successors, (44), 18 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 18:36:09,755 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 927 transitions. [2021-08-21 18:36:09,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:36:09,756 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:09,756 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:36:09,779 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-08-21 18:36:09,977 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-08-21 18:36:09,977 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:09,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:09,977 INFO L82 PathProgramCache]: Analyzing trace with hash 836353438, now seen corresponding path program 15 times [2021-08-21 18:36:09,978 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:09,978 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476744278] [2021-08-21 18:36:09,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:09,978 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:09,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:10,360 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 18:36:10,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:10,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476744278] [2021-08-21 18:36:10,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1476744278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:10,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483769875] [2021-08-21 18:36:10,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:36:10,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:10,361 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:10,361 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 18:36:10,362 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 18:36:12,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:36:12,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:12,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:36:12,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:12,896 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:36:12,897 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 95 treesize of output 87 [2021-08-21 18:36:14,971 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 18:36:14,971 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483769875] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:14,971 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:14,971 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12] total 19 [2021-08-21 18:36:14,971 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1107539057] [2021-08-21 18:36:14,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:36:14,972 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:14,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:36:14,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:36:14,972 INFO L87 Difference]: Start difference. First operand 414 states and 927 transitions. Second operand has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:17,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:17,049 INFO L93 Difference]: Finished difference Result 633 states and 1309 transitions. [2021-08-21 18:36:17,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:36:17,050 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:36:17,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:17,051 INFO L225 Difference]: With dead ends: 633 [2021-08-21 18:36:17,052 INFO L226 Difference]: Without dead ends: 623 [2021-08-21 18:36:17,052 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 17 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 2053.7ms TimeCoverageRelationStatistics Valid=252, Invalid=1308, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:36:17,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-08-21 18:36:17,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 414. [2021-08-21 18:36:17,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 2.2445520581113803) internal successors, (927), 413 states have internal predecessors, (927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:17,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 927 transitions. [2021-08-21 18:36:17,058 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 927 transitions. Word has length 26 [2021-08-21 18:36:17,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:17,058 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 927 transitions. [2021-08-21 18:36:17,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.526315789473684) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:17,058 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 927 transitions. [2021-08-21 18:36:17,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:36:17,059 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:17,059 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:36:17,082 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-08-21 18:36:17,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:17,280 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:17,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:17,281 INFO L82 PathProgramCache]: Analyzing trace with hash 1935474206, now seen corresponding path program 17 times [2021-08-21 18:36:17,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:17,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313006540] [2021-08-21 18:36:17,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:17,281 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:17,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:17,673 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:17,673 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:17,673 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313006540] [2021-08-21 18:36:17,673 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313006540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:17,674 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170056547] [2021-08-21 18:36:17,674 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:36:17,674 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:17,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:17,674 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 18:36:17,675 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 18:36:19,718 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:36:19,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:19,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:36:19,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:20,276 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:36:20,300 INFO L354 Elim1Store]: treesize reduction 20, result has 60.8 percent of original size [2021-08-21 18:36:20,301 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 126 treesize of output 106 [2021-08-21 18:36:21,077 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:36:21,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170056547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:21,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:21,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 19 [2021-08-21 18:36:21,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254634481] [2021-08-21 18:36:21,077 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:36:21,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:21,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:36:21,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:36:21,078 INFO L87 Difference]: Start difference. First operand 414 states and 927 transitions. Second operand has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:23,978 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:23,978 INFO L93 Difference]: Finished difference Result 585 states and 1272 transitions. [2021-08-21 18:36:23,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:36:23,978 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:36:23,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:23,980 INFO L225 Difference]: With dead ends: 585 [2021-08-21 18:36:23,980 INFO L226 Difference]: Without dead ends: 575 [2021-08-21 18:36:23,981 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 804 ImplicationChecksByTransitivity, 2803.7ms TimeCoverageRelationStatistics Valid=538, Invalid=2324, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 18:36:23,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 575 states. [2021-08-21 18:36:23,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 575 to 440. [2021-08-21 18:36:23,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 440 states, 439 states have (on average 2.2391799544419135) internal successors, (983), 439 states have internal predecessors, (983), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:23,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 440 states to 440 states and 983 transitions. [2021-08-21 18:36:23,986 INFO L78 Accepts]: Start accepts. Automaton has 440 states and 983 transitions. Word has length 26 [2021-08-21 18:36:23,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:23,987 INFO L470 AbstractCegarLoop]: Abstraction has 440 states and 983 transitions. [2021-08-21 18:36:23,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.4) internal successors, (48), 19 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:23,987 INFO L276 IsEmpty]: Start isEmpty. Operand 440 states and 983 transitions. [2021-08-21 18:36:23,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:36:23,987 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:23,987 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:36:24,013 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-08-21 18:36:24,204 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:24,205 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:24,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:24,205 INFO L82 PathProgramCache]: Analyzing trace with hash 1975466006, now seen corresponding path program 16 times [2021-08-21 18:36:24,205 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:24,205 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819415262] [2021-08-21 18:36:24,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:24,205 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:24,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:24,649 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 18:36:24,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:24,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819415262] [2021-08-21 18:36:24,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819415262] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:24,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653635721] [2021-08-21 18:36:24,650 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:36:24,650 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:24,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:24,651 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 18:36:24,652 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 18:36:26,780 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:36:26,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:26,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 18:36:26,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:27,403 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 18:36:27,404 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-21 18:36:28,348 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 18:36:28,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653635721] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:28,348 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:28,348 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:36:28,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360408952] [2021-08-21 18:36:28,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:36:28,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:28,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:36:28,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:36:28,349 INFO L87 Difference]: Start difference. First operand 440 states and 983 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:30,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:30,223 INFO L93 Difference]: Finished difference Result 705 states and 1472 transitions. [2021-08-21 18:36:30,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:36:30,223 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:36:30,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:30,225 INFO L225 Difference]: With dead ends: 705 [2021-08-21 18:36:30,225 INFO L226 Difference]: Without dead ends: 700 [2021-08-21 18:36:30,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1895.2ms TimeCoverageRelationStatistics Valid=304, Invalid=1102, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:36:30,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 700 states. [2021-08-21 18:36:30,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 700 to 439. [2021-08-21 18:36:30,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 2.2351598173515983) internal successors, (979), 438 states have internal predecessors, (979), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:30,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 979 transitions. [2021-08-21 18:36:30,232 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 979 transitions. Word has length 26 [2021-08-21 18:36:30,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:30,232 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 979 transitions. [2021-08-21 18:36:30,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:30,233 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 979 transitions. [2021-08-21 18:36:30,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:36:30,233 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:30,233 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:36:30,256 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2021-08-21 18:36:30,434 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-08-21 18:36:30,434 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:30,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:30,434 INFO L82 PathProgramCache]: Analyzing trace with hash 291662298, now seen corresponding path program 17 times [2021-08-21 18:36:30,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:30,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964410547] [2021-08-21 18:36:30,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:30,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:30,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:30,784 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 18:36:30,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:30,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964410547] [2021-08-21 18:36:30,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964410547] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:30,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [351259325] [2021-08-21 18:36:30,784 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:36:30,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:30,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:30,785 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 18:36:30,785 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 18:36:33,035 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:36:33,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:33,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:36:33,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:33,880 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:36:33,880 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-21 18:36:34,264 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 18:36:34,265 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [351259325] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:34,265 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:34,265 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-08-21 18:36:34,265 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786876761] [2021-08-21 18:36:34,265 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:36:34,265 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:34,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:36:34,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:36:34,266 INFO L87 Difference]: Start difference. First operand 439 states and 979 transitions. Second operand has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:34,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:34,983 INFO L93 Difference]: Finished difference Result 620 states and 1319 transitions. [2021-08-21 18:36:34,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:36:34,984 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:36:34,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:34,985 INFO L225 Difference]: With dead ends: 620 [2021-08-21 18:36:34,986 INFO L226 Difference]: Without dead ends: 615 [2021-08-21 18:36:34,986 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 859.6ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:36:34,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-08-21 18:36:34,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 453. [2021-08-21 18:36:34,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 2.243362831858407) internal successors, (1014), 452 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:34,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1014 transitions. [2021-08-21 18:36:34,992 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1014 transitions. Word has length 26 [2021-08-21 18:36:34,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:34,992 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 1014 transitions. [2021-08-21 18:36:34,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.5) internal successors, (50), 20 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1014 transitions. [2021-08-21 18:36:34,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:36:34,993 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:34,993 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:36:35,015 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-08-21 18:36:35,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 18:36:35,196 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:35,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:35,196 INFO L82 PathProgramCache]: Analyzing trace with hash -1280722470, now seen corresponding path program 18 times [2021-08-21 18:36:35,196 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:35,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887389831] [2021-08-21 18:36:35,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:35,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:35,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:35,505 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 18:36:35,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:35,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887389831] [2021-08-21 18:36:35,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1887389831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:35,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643798673] [2021-08-21 18:36:35,505 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:36:35,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:35,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:35,506 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 18:36:35,507 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 18:36:37,858 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:36:37,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:37,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:36:37,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:38,431 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:36:38,436 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:36:38,436 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 104 treesize of output 78 [2021-08-21 18:36:39,402 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 18:36:39,402 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643798673] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:39,402 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:39,402 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 18:36:39,402 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937037742] [2021-08-21 18:36:39,402 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:36:39,402 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:39,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:36:39,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:36:39,403 INFO L87 Difference]: Start difference. First operand 453 states and 1014 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:40,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:40,615 INFO L93 Difference]: Finished difference Result 710 states and 1489 transitions. [2021-08-21 18:36:40,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:36:40,615 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:36:40,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:40,617 INFO L225 Difference]: With dead ends: 710 [2021-08-21 18:36:40,617 INFO L226 Difference]: Without dead ends: 705 [2021-08-21 18:36:40,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 1248.3ms TimeCoverageRelationStatistics Valid=222, Invalid=834, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:36:40,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 705 states. [2021-08-21 18:36:40,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 705 to 453. [2021-08-21 18:36:40,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 2.243362831858407) internal successors, (1014), 452 states have internal predecessors, (1014), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:40,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 1014 transitions. [2021-08-21 18:36:40,624 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 1014 transitions. Word has length 26 [2021-08-21 18:36:40,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:40,624 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 1014 transitions. [2021-08-21 18:36:40,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:40,625 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 1014 transitions. [2021-08-21 18:36:40,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:36:40,625 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:40,625 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:36:40,648 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 18:36:40,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 18:36:40,837 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:40,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:40,837 INFO L82 PathProgramCache]: Analyzing trace with hash -1454412646, now seen corresponding path program 19 times [2021-08-21 18:36:40,837 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:40,837 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1886705114] [2021-08-21 18:36:40,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:40,837 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:40,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:41,094 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 18:36:41,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:41,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1886705114] [2021-08-21 18:36:41,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1886705114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:41,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262575649] [2021-08-21 18:36:41,095 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:36:41,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:41,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:41,095 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 18:36:41,111 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 18:36:43,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:43,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 18:36:43,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:44,053 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 18:36:44,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 94 treesize of output 78 [2021-08-21 18:36:45,010 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 18:36:45,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [262575649] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:45,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:45,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 18:36:45,011 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37097658] [2021-08-21 18:36:45,011 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:36:45,011 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:45,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:36:45,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:36:45,012 INFO L87 Difference]: Start difference. First operand 453 states and 1014 transitions. Second operand has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:45,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:45,537 INFO L93 Difference]: Finished difference Result 624 states and 1336 transitions. [2021-08-21 18:36:45,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:36:45,538 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:36:45,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:45,539 INFO L225 Difference]: With dead ends: 624 [2021-08-21 18:36:45,540 INFO L226 Difference]: Without dead ends: 619 [2021-08-21 18:36:45,540 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 4 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 631.8ms TimeCoverageRelationStatistics Valid=149, Invalid=451, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:36:45,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-08-21 18:36:45,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 455. [2021-08-21 18:36:45,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 455 states, 454 states have (on average 2.2422907488986783) internal successors, (1018), 454 states have internal predecessors, (1018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:45,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 455 states to 455 states and 1018 transitions. [2021-08-21 18:36:45,546 INFO L78 Accepts]: Start accepts. Automaton has 455 states and 1018 transitions. Word has length 26 [2021-08-21 18:36:45,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:45,546 INFO L470 AbstractCegarLoop]: Abstraction has 455 states and 1018 transitions. [2021-08-21 18:36:45,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.9375) internal successors, (47), 16 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:45,546 INFO L276 IsEmpty]: Start isEmpty. Operand 455 states and 1018 transitions. [2021-08-21 18:36:45,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:36:45,547 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:45,547 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:36:45,571 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 18:36:45,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 18:36:45,757 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:45,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:45,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2046217062, now seen corresponding path program 20 times [2021-08-21 18:36:45,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:45,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840396270] [2021-08-21 18:36:45,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:45,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:45,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:46,069 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 18:36:46,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:46,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840396270] [2021-08-21 18:36:46,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840396270] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:46,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [840841293] [2021-08-21 18:36:46,069 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:36:46,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:46,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:46,071 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 18:36:46,071 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 18:36:48,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:36:48,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:48,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:36:48,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:49,107 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:36:49,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:36:49,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 69 [2021-08-21 18:36:50,106 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 18:36:50,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [840841293] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:50,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:50,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 18:36:50,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358211069] [2021-08-21 18:36:50,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:36:50,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:50,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:36:50,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:36:50,107 INFO L87 Difference]: Start difference. First operand 455 states and 1018 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:50,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:50,835 INFO L93 Difference]: Finished difference Result 620 states and 1328 transitions. [2021-08-21 18:36:50,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:36:50,835 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:36:50,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:50,837 INFO L225 Difference]: With dead ends: 620 [2021-08-21 18:36:50,837 INFO L226 Difference]: Without dead ends: 615 [2021-08-21 18:36:50,838 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 846.6ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:36:50,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-08-21 18:36:50,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 459. [2021-08-21 18:36:50,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 459 states, 458 states have (on average 2.2401746724890828) internal successors, (1026), 458 states have internal predecessors, (1026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:50,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 459 states to 459 states and 1026 transitions. [2021-08-21 18:36:50,844 INFO L78 Accepts]: Start accepts. Automaton has 459 states and 1026 transitions. Word has length 26 [2021-08-21 18:36:50,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:50,844 INFO L470 AbstractCegarLoop]: Abstraction has 459 states and 1026 transitions. [2021-08-21 18:36:50,844 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:50,844 INFO L276 IsEmpty]: Start isEmpty. Operand 459 states and 1026 transitions. [2021-08-21 18:36:50,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:36:50,845 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:50,845 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:36:50,870 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-08-21 18:36:51,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 18:36:51,062 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:51,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:51,062 INFO L82 PathProgramCache]: Analyzing trace with hash -2095905962, now seen corresponding path program 21 times [2021-08-21 18:36:51,062 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:51,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766226037] [2021-08-21 18:36:51,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:51,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:51,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:51,459 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 18:36:51,459 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:51,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766226037] [2021-08-21 18:36:51,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766226037] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:51,459 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901561842] [2021-08-21 18:36:51,459 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:36:51,459 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:51,459 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:51,460 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 18:36:51,461 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 18:36:54,086 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:36:54,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:54,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:36:54,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:36:54,644 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 18:36:54,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 77 [2021-08-21 18:36:55,702 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 18:36:55,703 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [901561842] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:55,703 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:36:55,703 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 18:36:55,703 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449044974] [2021-08-21 18:36:55,703 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:36:55,703 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:36:55,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:36:55,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:36:55,704 INFO L87 Difference]: Start difference. First operand 459 states and 1026 transitions. Second operand has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:56,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:36:56,210 INFO L93 Difference]: Finished difference Result 617 states and 1328 transitions. [2021-08-21 18:36:56,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:36:56,211 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:36:56,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:36:56,213 INFO L225 Difference]: With dead ends: 617 [2021-08-21 18:36:56,213 INFO L226 Difference]: Without dead ends: 612 [2021-08-21 18:36:56,213 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 656.5ms TimeCoverageRelationStatistics Valid=152, Invalid=550, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:36:56,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-08-21 18:36:56,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 463. [2021-08-21 18:36:56,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 463 states, 462 states have (on average 2.2337662337662336) internal successors, (1032), 462 states have internal predecessors, (1032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:56,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 463 states to 463 states and 1032 transitions. [2021-08-21 18:36:56,219 INFO L78 Accepts]: Start accepts. Automaton has 463 states and 1032 transitions. Word has length 26 [2021-08-21 18:36:56,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:36:56,219 INFO L470 AbstractCegarLoop]: Abstraction has 463 states and 1032 transitions. [2021-08-21 18:36:56,219 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.5789473684210527) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:36:56,219 INFO L276 IsEmpty]: Start isEmpty. Operand 463 states and 1032 transitions. [2021-08-21 18:36:56,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:36:56,220 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:36:56,220 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:36:56,244 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 18:36:56,430 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-08-21 18:36:56,431 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:36:56,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:36:56,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1598426410, now seen corresponding path program 22 times [2021-08-21 18:36:56,431 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:36:56,431 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292917129] [2021-08-21 18:36:56,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:36:56,431 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:36:56,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:36:57,022 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 18:36:57,022 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:36:57,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292917129] [2021-08-21 18:36:57,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292917129] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:36:57,022 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752611104] [2021-08-21 18:36:57,022 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:36:57,022 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:36:57,022 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:36:57,023 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 18:36:57,024 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 18:36:59,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:36:59,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:36:59,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:36:59,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:00,500 INFO L354 Elim1Store]: treesize reduction 14, result has 17.6 percent of original size [2021-08-21 18:37:00,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 110 treesize of output 79 [2021-08-21 18:37:00,934 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:00,935 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752611104] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:00,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:00,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:37:00,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1063954529] [2021-08-21 18:37:00,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:37:00,935 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:00,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:37:00,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:37:00,935 INFO L87 Difference]: Start difference. First operand 463 states and 1032 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:01,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:01,499 INFO L93 Difference]: Finished difference Result 617 states and 1316 transitions. [2021-08-21 18:37:01,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:37:01,500 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:37:01,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:01,502 INFO L225 Difference]: With dead ends: 617 [2021-08-21 18:37:01,502 INFO L226 Difference]: Without dead ends: 612 [2021-08-21 18:37:01,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 794.9ms TimeCoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:37:01,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 612 states. [2021-08-21 18:37:01,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 612 to 465. [2021-08-21 18:37:01,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 465 states, 464 states have (on average 2.2370689655172415) internal successors, (1038), 464 states have internal predecessors, (1038), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:01,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 465 states to 465 states and 1038 transitions. [2021-08-21 18:37:01,508 INFO L78 Accepts]: Start accepts. Automaton has 465 states and 1038 transitions. Word has length 26 [2021-08-21 18:37:01,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:01,508 INFO L470 AbstractCegarLoop]: Abstraction has 465 states and 1038 transitions. [2021-08-21 18:37:01,508 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:01,508 INFO L276 IsEmpty]: Start isEmpty. Operand 465 states and 1038 transitions. [2021-08-21 18:37:01,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:37:01,509 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:01,509 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:37:01,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-08-21 18:37:01,709 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 18:37:01,709 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:01,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:01,710 INFO L82 PathProgramCache]: Analyzing trace with hash 509143638, now seen corresponding path program 18 times [2021-08-21 18:37:01,710 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:01,710 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868439995] [2021-08-21 18:37:01,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:01,710 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:01,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:02,029 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:02,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868439995] [2021-08-21 18:37:02,029 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868439995] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:02,029 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [561042457] [2021-08-21 18:37:02,029 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:37:02,029 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:02,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:02,033 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 18:37:02,034 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 18:37:04,837 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:37:04,837 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:04,837 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:37:04,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:05,664 INFO L354 Elim1Store]: treesize reduction 46, result has 13.2 percent of original size [2021-08-21 18:37:05,665 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 122 treesize of output 82 [2021-08-21 18:37:05,849 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:05,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [561042457] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:05,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:05,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 18:37:05,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209197910] [2021-08-21 18:37:05,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:37:05,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:05,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:37:05,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:37:05,850 INFO L87 Difference]: Start difference. First operand 465 states and 1038 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:06,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:06,690 INFO L93 Difference]: Finished difference Result 617 states and 1282 transitions. [2021-08-21 18:37:06,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:37:06,691 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:37:06,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:06,693 INFO L225 Difference]: With dead ends: 617 [2021-08-21 18:37:06,693 INFO L226 Difference]: Without dead ends: 607 [2021-08-21 18:37:06,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 914.3ms TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:37:06,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 607 states. [2021-08-21 18:37:06,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 607 to 484. [2021-08-21 18:37:06,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 484 states, 483 states have (on average 2.2318840579710146) internal successors, (1078), 483 states have internal predecessors, (1078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:06,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 484 states to 484 states and 1078 transitions. [2021-08-21 18:37:06,699 INFO L78 Accepts]: Start accepts. Automaton has 484 states and 1078 transitions. Word has length 26 [2021-08-21 18:37:06,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:06,699 INFO L470 AbstractCegarLoop]: Abstraction has 484 states and 1078 transitions. [2021-08-21 18:37:06,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:06,700 INFO L276 IsEmpty]: Start isEmpty. Operand 484 states and 1078 transitions. [2021-08-21 18:37:06,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:37:06,700 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:06,700 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:37:06,725 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 18:37:06,901 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-21 18:37:06,901 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:06,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:06,902 INFO L82 PathProgramCache]: Analyzing trace with hash -405959978, now seen corresponding path program 23 times [2021-08-21 18:37:06,902 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:06,902 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293500310] [2021-08-21 18:37:06,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:06,902 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:06,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:07,350 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 18:37:07,350 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:07,350 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293500310] [2021-08-21 18:37:07,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293500310] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:07,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142950193] [2021-08-21 18:37:07,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:37:07,351 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:07,351 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:07,352 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 18:37:07,353 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 18:37:10,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:37:10,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:10,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:37:10,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:10,860 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 18:37:10,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 112 treesize of output 86 [2021-08-21 18:37:11,842 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 18:37:11,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1142950193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:11,843 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:11,843 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 19 [2021-08-21 18:37:11,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031119907] [2021-08-21 18:37:11,843 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:37:11,843 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:11,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:37:11,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:37:11,843 INFO L87 Difference]: Start difference. First operand 484 states and 1078 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:13,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:13,665 INFO L93 Difference]: Finished difference Result 789 states and 1627 transitions. [2021-08-21 18:37:13,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:37:13,665 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:37:13,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:13,667 INFO L225 Difference]: With dead ends: 789 [2021-08-21 18:37:13,667 INFO L226 Difference]: Without dead ends: 779 [2021-08-21 18:37:13,668 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 1714.4ms TimeCoverageRelationStatistics Valid=294, Invalid=1038, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:37:13,668 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 779 states. [2021-08-21 18:37:13,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 779 to 485. [2021-08-21 18:37:13,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 2.231404958677686) internal successors, (1080), 484 states have internal predecessors, (1080), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:13,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 1080 transitions. [2021-08-21 18:37:13,674 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 1080 transitions. Word has length 26 [2021-08-21 18:37:13,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:13,674 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 1080 transitions. [2021-08-21 18:37:13,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:13,675 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 1080 transitions. [2021-08-21 18:37:13,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:37:13,675 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:13,675 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:37:13,700 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 18:37:13,876 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:13,876 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:13,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:13,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1063241130, now seen corresponding path program 19 times [2021-08-21 18:37:13,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:13,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020596280] [2021-08-21 18:37:13,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:13,876 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:13,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:14,143 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:14,143 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:14,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020596280] [2021-08-21 18:37:14,143 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020596280] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:14,143 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215840561] [2021-08-21 18:37:14,143 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:37:14,143 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:14,144 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:14,144 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 18:37:14,145 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 18:37:17,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:17,146 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:37:17,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:17,647 INFO L354 Elim1Store]: treesize reduction 22, result has 53.2 percent of original size [2021-08-21 18:37:17,648 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 116 treesize of output 100 [2021-08-21 18:37:18,879 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:18,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215840561] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:18,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:18,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 18:37:18,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491992557] [2021-08-21 18:37:18,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:37:18,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:18,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:37:18,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:37:18,880 INFO L87 Difference]: Start difference. First operand 485 states and 1080 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:20,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:20,531 INFO L93 Difference]: Finished difference Result 926 states and 1883 transitions. [2021-08-21 18:37:20,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:37:20,532 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:37:20,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:20,534 INFO L225 Difference]: With dead ends: 926 [2021-08-21 18:37:20,534 INFO L226 Difference]: Without dead ends: 912 [2021-08-21 18:37:20,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 1567.2ms TimeCoverageRelationStatistics Valid=361, Invalid=1445, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:37:20,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 912 states. [2021-08-21 18:37:20,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 912 to 490. [2021-08-21 18:37:20,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 490 states, 489 states have (on average 2.233128834355828) internal successors, (1092), 489 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:20,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 490 states to 490 states and 1092 transitions. [2021-08-21 18:37:20,542 INFO L78 Accepts]: Start accepts. Automaton has 490 states and 1092 transitions. Word has length 26 [2021-08-21 18:37:20,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:20,542 INFO L470 AbstractCegarLoop]: Abstraction has 490 states and 1092 transitions. [2021-08-21 18:37:20,542 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 17 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:20,542 INFO L276 IsEmpty]: Start isEmpty. Operand 490 states and 1092 transitions. [2021-08-21 18:37:20,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:37:20,543 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:20,543 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:37:20,569 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-08-21 18:37:20,743 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:20,743 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:20,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:20,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1774753178, now seen corresponding path program 24 times [2021-08-21 18:37:20,744 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:20,744 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873940065] [2021-08-21 18:37:20,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:20,744 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:20,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:21,174 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 18:37:21,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:21,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873940065] [2021-08-21 18:37:21,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873940065] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:21,175 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548681214] [2021-08-21 18:37:21,175 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:37:21,175 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:21,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:21,176 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 18:37:21,176 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 18:37:24,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:37:24,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:24,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:37:24,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:24,736 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:37:24,741 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:37:24,741 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 85 treesize of output 69 [2021-08-21 18:37:25,695 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 18:37:25,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [548681214] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:25,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:25,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10] total 19 [2021-08-21 18:37:25,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347519231] [2021-08-21 18:37:25,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:37:25,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:25,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:37:25,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:37:25,696 INFO L87 Difference]: Start difference. First operand 490 states and 1092 transitions. Second operand has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:27,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:27,227 INFO L93 Difference]: Finished difference Result 687 states and 1456 transitions. [2021-08-21 18:37:27,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:37:27,228 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:37:27,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:27,236 INFO L225 Difference]: With dead ends: 687 [2021-08-21 18:37:27,236 INFO L226 Difference]: Without dead ends: 682 [2021-08-21 18:37:27,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 366 ImplicationChecksByTransitivity, 1603.9ms TimeCoverageRelationStatistics Valid=256, Invalid=1150, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:37:27,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 682 states. [2021-08-21 18:37:27,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 682 to 487. [2021-08-21 18:37:27,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 487 states, 486 states have (on average 2.2263374485596708) internal successors, (1082), 486 states have internal predecessors, (1082), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:27,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 487 states to 487 states and 1082 transitions. [2021-08-21 18:37:27,243 INFO L78 Accepts]: Start accepts. Automaton has 487 states and 1082 transitions. Word has length 26 [2021-08-21 18:37:27,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:27,243 INFO L470 AbstractCegarLoop]: Abstraction has 487 states and 1082 transitions. [2021-08-21 18:37:27,243 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.6315789473684212) internal successors, (50), 19 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:27,243 INFO L276 IsEmpty]: Start isEmpty. Operand 487 states and 1082 transitions. [2021-08-21 18:37:27,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:37:27,244 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:27,244 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:37:27,272 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 18:37:27,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-08-21 18:37:27,454 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:27,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:27,454 INFO L82 PathProgramCache]: Analyzing trace with hash -1421093350, now seen corresponding path program 20 times [2021-08-21 18:37:27,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:27,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156694202] [2021-08-21 18:37:27,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:27,454 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:27,822 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:27,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:27,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156694202] [2021-08-21 18:37:27,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156694202] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:27,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437724597] [2021-08-21 18:37:27,822 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:37:27,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:27,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:27,823 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 18:37:27,824 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 18:37:30,984 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:37:30,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:30,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:37:30,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:31,495 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:37:31,497 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:37:31,498 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:37:31,509 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:37:31,510 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 122 treesize of output 100 [2021-08-21 18:37:32,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:32,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437724597] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:32,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:32,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 17 [2021-08-21 18:37:32,260 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417829390] [2021-08-21 18:37:32,260 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:37:32,260 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:32,260 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:37:32,260 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=237, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:37:32,261 INFO L87 Difference]: Start difference. First operand 487 states and 1082 transitions. Second operand has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:34,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:34,629 INFO L93 Difference]: Finished difference Result 733 states and 1545 transitions. [2021-08-21 18:37:34,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:37:34,630 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:37:34,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:34,631 INFO L225 Difference]: With dead ends: 733 [2021-08-21 18:37:34,631 INFO L226 Difference]: Without dead ends: 723 [2021-08-21 18:37:34,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 453 ImplicationChecksByTransitivity, 2316.7ms TimeCoverageRelationStatistics Valid=400, Invalid=1492, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:37:34,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 723 states. [2021-08-21 18:37:34,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 723 to 497. [2021-08-21 18:37:34,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.221774193548387) internal successors, (1102), 496 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:34,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1102 transitions. [2021-08-21 18:37:34,638 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1102 transitions. Word has length 26 [2021-08-21 18:37:34,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:34,638 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1102 transitions. [2021-08-21 18:37:34,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.7222222222222223) internal successors, (49), 17 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:34,638 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1102 transitions. [2021-08-21 18:37:34,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:37:34,639 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:34,639 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:37:34,664 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-08-21 18:37:34,839 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 18:37:34,839 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:34,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:34,840 INFO L82 PathProgramCache]: Analyzing trace with hash -314370918, now seen corresponding path program 25 times [2021-08-21 18:37:34,840 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:34,840 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1842485049] [2021-08-21 18:37:34,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:34,840 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:34,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:35,309 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 18:37:35,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:35,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1842485049] [2021-08-21 18:37:35,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1842485049] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:35,311 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701755079] [2021-08-21 18:37:35,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:37:35,311 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:35,311 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:35,312 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 18:37:35,312 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 18:37:38,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:38,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 29 conjunts are in the unsatisfiable core [2021-08-21 18:37:38,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:39,045 INFO L354 Elim1Store]: treesize reduction 9, result has 47.1 percent of original size [2021-08-21 18:37:39,046 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 93 treesize of output 77 [2021-08-21 18:37:40,204 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 18:37:40,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701755079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:40,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:40,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 18 [2021-08-21 18:37:40,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937327432] [2021-08-21 18:37:40,204 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:37:40,204 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:40,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:37:40,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=239, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:37:40,205 INFO L87 Difference]: Start difference. First operand 497 states and 1102 transitions. Second operand has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:40,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:40,965 INFO L93 Difference]: Finished difference Result 684 states and 1457 transitions. [2021-08-21 18:37:40,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:37:40,967 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:37:40,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:40,968 INFO L225 Difference]: With dead ends: 684 [2021-08-21 18:37:40,968 INFO L226 Difference]: Without dead ends: 679 [2021-08-21 18:37:40,969 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 836.9ms TimeCoverageRelationStatistics Valid=157, Invalid=599, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:37:40,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 679 states. [2021-08-21 18:37:40,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 679 to 497. [2021-08-21 18:37:40,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 2.221774193548387) internal successors, (1102), 496 states have internal predecessors, (1102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:40,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 1102 transitions. [2021-08-21 18:37:40,975 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 1102 transitions. Word has length 26 [2021-08-21 18:37:40,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:40,975 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 1102 transitions. [2021-08-21 18:37:40,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.6666666666666665) internal successors, (48), 18 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:40,975 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 1102 transitions. [2021-08-21 18:37:40,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-08-21 18:37:40,975 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:40,976 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:37:41,001 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-08-21 18:37:41,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-21 18:37:41,176 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:41,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:41,176 INFO L82 PathProgramCache]: Analyzing trace with hash -621267686, now seen corresponding path program 21 times [2021-08-21 18:37:41,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:41,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420231004] [2021-08-21 18:37:41,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:41,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:41,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:41,570 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:41,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420231004] [2021-08-21 18:37:41,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420231004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:41,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1216635098] [2021-08-21 18:37:41,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:37:41,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:41,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:41,571 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 18:37:41,573 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 18:37:44,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:37:44,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:44,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 27 conjunts are in the unsatisfiable core [2021-08-21 18:37:44,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:45,700 INFO L354 Elim1Store]: treesize reduction 16, result has 67.3 percent of original size [2021-08-21 18:37:45,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 120 treesize of output 118 [2021-08-21 18:37:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:47,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1216635098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:47,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:47,345 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11] total 19 [2021-08-21 18:37:47,345 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300928179] [2021-08-21 18:37:47,345 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:37:47,345 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:47,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:37:47,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=296, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:37:47,346 INFO L87 Difference]: Start difference. First operand 497 states and 1102 transitions. Second operand has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:48,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:48,389 INFO L93 Difference]: Finished difference Result 701 states and 1482 transitions. [2021-08-21 18:37:48,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:37:48,389 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-08-21 18:37:48,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:48,390 INFO L225 Difference]: With dead ends: 701 [2021-08-21 18:37:48,390 INFO L226 Difference]: Without dead ends: 691 [2021-08-21 18:37:48,391 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 1212.4ms TimeCoverageRelationStatistics Valid=197, Invalid=673, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:37:48,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 691 states. [2021-08-21 18:37:48,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 691 to 494. [2021-08-21 18:37:48,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 2.2150101419878294) internal successors, (1092), 493 states have internal predecessors, (1092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:48,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 1092 transitions. [2021-08-21 18:37:48,397 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 1092 transitions. Word has length 26 [2021-08-21 18:37:48,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:48,397 INFO L470 AbstractCegarLoop]: Abstraction has 494 states and 1092 transitions. [2021-08-21 18:37:48,397 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.45) internal successors, (49), 19 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:48,397 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 1092 transitions. [2021-08-21 18:37:48,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:37:48,398 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:48,398 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:37:48,424 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 18:37:48,598 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:48,599 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:48,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:48,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1136752764, now seen corresponding path program 26 times [2021-08-21 18:37:48,599 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:48,599 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464988163] [2021-08-21 18:37:48,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:48,599 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:48,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:48,662 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:48,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:48,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464988163] [2021-08-21 18:37:48,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464988163] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:48,663 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [122254735] [2021-08-21 18:37:48,663 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:37:48,663 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:48,663 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:48,664 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 18:37:48,664 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 18:37:52,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:37:52,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:52,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:37:52,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:52,247 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [122254735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:52,247 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:52,247 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-08-21 18:37:52,247 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772888415] [2021-08-21 18:37:52,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:37:52,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:52,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:37:52,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:37:52,247 INFO L87 Difference]: Start difference. First operand 494 states and 1092 transitions. Second operand has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:52,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:52,793 INFO L93 Difference]: Finished difference Result 1026 states and 2062 transitions. [2021-08-21 18:37:52,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 18:37:52,793 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:37:52,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:52,795 INFO L225 Difference]: With dead ends: 1026 [2021-08-21 18:37:52,795 INFO L226 Difference]: Without dead ends: 1026 [2021-08-21 18:37:52,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 398.9ms TimeCoverageRelationStatistics Valid=582, Invalid=1968, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:37:52,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1026 states. [2021-08-21 18:37:52,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1026 to 554. [2021-08-21 18:37:52,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 2.2495479204339963) internal successors, (1244), 553 states have internal predecessors, (1244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:52,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1244 transitions. [2021-08-21 18:37:52,803 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1244 transitions. Word has length 28 [2021-08-21 18:37:52,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:52,803 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1244 transitions. [2021-08-21 18:37:52,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.75) internal successors, (44), 16 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:52,803 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1244 transitions. [2021-08-21 18:37:52,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:37:52,804 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:52,804 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:37:52,830 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-08-21 18:37:53,016 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-08-21 18:37:53,017 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:53,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:53,017 INFO L82 PathProgramCache]: Analyzing trace with hash -354742148, now seen corresponding path program 27 times [2021-08-21 18:37:53,017 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:53,017 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123005114] [2021-08-21 18:37:53,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:53,017 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:53,031 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:53,085 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:53,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:53,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123005114] [2021-08-21 18:37:53,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123005114] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:53,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149580754] [2021-08-21 18:37:53,086 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:37:53,086 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:53,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:53,087 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 18:37:53,088 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 18:37:56,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:37:56,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:37:56,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:37:56,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:37:56,710 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:56,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149580754] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:56,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:37:56,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-08-21 18:37:56,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56591288] [2021-08-21 18:37:56,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:37:56,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:37:56,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:37:56,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:37:56,712 INFO L87 Difference]: Start difference. First operand 554 states and 1244 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:57,489 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:37:57,489 INFO L93 Difference]: Finished difference Result 1174 states and 2299 transitions. [2021-08-21 18:37:57,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 18:37:57,489 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:37:57,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:37:57,491 INFO L225 Difference]: With dead ends: 1174 [2021-08-21 18:37:57,491 INFO L226 Difference]: Without dead ends: 1174 [2021-08-21 18:37:57,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1358 ImplicationChecksByTransitivity, 567.6ms TimeCoverageRelationStatistics Valid=826, Invalid=3206, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 18:37:57,492 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1174 states. [2021-08-21 18:37:57,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1174 to 556. [2021-08-21 18:37:57,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 556 states, 555 states have (on average 2.2378378378378376) internal successors, (1242), 555 states have internal predecessors, (1242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:57,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 556 states to 556 states and 1242 transitions. [2021-08-21 18:37:57,500 INFO L78 Accepts]: Start accepts. Automaton has 556 states and 1242 transitions. Word has length 28 [2021-08-21 18:37:57,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:37:57,500 INFO L470 AbstractCegarLoop]: Abstraction has 556 states and 1242 transitions. [2021-08-21 18:37:57,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 17 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:37:57,500 INFO L276 IsEmpty]: Start isEmpty. Operand 556 states and 1242 transitions. [2021-08-21 18:37:57,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:37:57,501 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:37:57,501 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:37:57,527 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-08-21 18:37:57,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:57,701 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:37:57,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:37:57,702 INFO L82 PathProgramCache]: Analyzing trace with hash -712994820, now seen corresponding path program 22 times [2021-08-21 18:37:57,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:37:57,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739434590] [2021-08-21 18:37:57,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:37:57,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:37:57,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:37:57,770 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:37:57,770 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:37:57,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739434590] [2021-08-21 18:37:57,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739434590] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:37:57,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311777892] [2021-08-21 18:37:57,770 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:37:57,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:37:57,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:37:57,771 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 18:37:57,812 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 18:38:01,228 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:38:01,228 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:01,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:38:01,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:01,379 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 4 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:01,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311777892] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:01,380 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:01,380 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 15 [2021-08-21 18:38:01,380 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639706240] [2021-08-21 18:38:01,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:38:01,380 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:01,380 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:38:01,380 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=165, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:38:01,381 INFO L87 Difference]: Start difference. First operand 556 states and 1242 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:01,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:01,733 INFO L93 Difference]: Finished difference Result 907 states and 1847 transitions. [2021-08-21 18:38:01,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:38:01,733 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:38:01,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:01,735 INFO L225 Difference]: With dead ends: 907 [2021-08-21 18:38:01,735 INFO L226 Difference]: Without dead ends: 907 [2021-08-21 18:38:01,735 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 251.9ms TimeCoverageRelationStatistics Valid=310, Invalid=1096, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:38:01,736 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 907 states. [2021-08-21 18:38:01,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 907 to 554. [2021-08-21 18:38:01,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 554 states, 553 states have (on average 2.2350813743218807) internal successors, (1236), 553 states have internal predecessors, (1236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:01,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 554 states to 554 states and 1236 transitions. [2021-08-21 18:38:01,742 INFO L78 Accepts]: Start accepts. Automaton has 554 states and 1236 transitions. Word has length 28 [2021-08-21 18:38:01,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:01,742 INFO L470 AbstractCegarLoop]: Abstraction has 554 states and 1236 transitions. [2021-08-21 18:38:01,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:01,743 INFO L276 IsEmpty]: Start isEmpty. Operand 554 states and 1236 transitions. [2021-08-21 18:38:01,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:01,743 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:01,743 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:01,769 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 18:38:01,944 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-08-21 18:38:01,944 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:01,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:01,944 INFO L82 PathProgramCache]: Analyzing trace with hash 1576605688, now seen corresponding path program 28 times [2021-08-21 18:38:01,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:01,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494255153] [2021-08-21 18:38:01,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:01,944 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:01,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:02,004 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:38:02,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:02,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494255153] [2021-08-21 18:38:02,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494255153] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:02,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199102918] [2021-08-21 18:38:02,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:38:02,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:02,005 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:02,005 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 18:38:02,006 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 18:38:05,446 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:38:05,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:05,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:38:05,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:05,554 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:38:05,555 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199102918] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:05,555 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:05,555 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 18:38:05,555 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991651685] [2021-08-21 18:38:05,555 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:38:05,555 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:05,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:38:05,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:38:05,556 INFO L87 Difference]: Start difference. First operand 554 states and 1236 transitions. Second operand has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:05,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:05,648 INFO L93 Difference]: Finished difference Result 870 states and 1844 transitions. [2021-08-21 18:38:05,648 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:38:05,648 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:38:05,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:05,650 INFO L225 Difference]: With dead ends: 870 [2021-08-21 18:38:05,650 INFO L226 Difference]: Without dead ends: 870 [2021-08-21 18:38:05,650 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 74.5ms TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:38:05,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 870 states. [2021-08-21 18:38:05,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 870 to 747. [2021-08-21 18:38:05,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 747 states, 746 states have (on average 2.239946380697051) internal successors, (1671), 746 states have internal predecessors, (1671), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:05,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 747 states to 747 states and 1671 transitions. [2021-08-21 18:38:05,658 INFO L78 Accepts]: Start accepts. Automaton has 747 states and 1671 transitions. Word has length 28 [2021-08-21 18:38:05,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:05,658 INFO L470 AbstractCegarLoop]: Abstraction has 747 states and 1671 transitions. [2021-08-21 18:38:05,658 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.4545454545454546) internal successors, (38), 11 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:05,659 INFO L276 IsEmpty]: Start isEmpty. Operand 747 states and 1671 transitions. [2021-08-21 18:38:05,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:05,659 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:05,659 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:05,686 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 18:38:05,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-21 18:38:05,866 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:05,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:05,867 INFO L82 PathProgramCache]: Analyzing trace with hash -273141896, now seen corresponding path program 29 times [2021-08-21 18:38:05,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:05,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659261444] [2021-08-21 18:38:05,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:05,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:05,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:05,932 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:05,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659261444] [2021-08-21 18:38:05,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659261444] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:05,932 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683177369] [2021-08-21 18:38:05,932 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:38:05,932 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:05,932 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:05,933 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 18:38:05,935 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 18:38:09,378 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:38:09,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:09,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:38:09,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:09,520 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:09,520 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683177369] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:09,520 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:09,520 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 18:38:09,520 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608663382] [2021-08-21 18:38:09,520 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:38:09,520 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:09,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:38:09,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:38:09,521 INFO L87 Difference]: Start difference. First operand 747 states and 1671 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:09,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:09,835 INFO L93 Difference]: Finished difference Result 1059 states and 2159 transitions. [2021-08-21 18:38:09,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:38:09,835 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:38:09,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:09,837 INFO L225 Difference]: With dead ends: 1059 [2021-08-21 18:38:09,837 INFO L226 Difference]: Without dead ends: 1041 [2021-08-21 18:38:09,837 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 217.0ms TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:38:09,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1041 states. [2021-08-21 18:38:09,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1041 to 816. [2021-08-21 18:38:09,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 816 states, 815 states have (on average 2.2429447852760735) internal successors, (1828), 815 states have internal predecessors, (1828), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:09,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 816 states to 816 states and 1828 transitions. [2021-08-21 18:38:09,847 INFO L78 Accepts]: Start accepts. Automaton has 816 states and 1828 transitions. Word has length 28 [2021-08-21 18:38:09,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:09,848 INFO L470 AbstractCegarLoop]: Abstraction has 816 states and 1828 transitions. [2021-08-21 18:38:09,848 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:09,848 INFO L276 IsEmpty]: Start isEmpty. Operand 816 states and 1828 transitions. [2021-08-21 18:38:09,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:09,849 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:09,849 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:09,876 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 18:38:10,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:10,059 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:10,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:10,059 INFO L82 PathProgramCache]: Analyzing trace with hash 235890424, now seen corresponding path program 23 times [2021-08-21 18:38:10,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:10,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170324783] [2021-08-21 18:38:10,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:10,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:10,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:10,117 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:10,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:10,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170324783] [2021-08-21 18:38:10,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170324783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:10,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1648536920] [2021-08-21 18:38:10,118 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:38:10,118 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:10,119 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:10,119 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 18:38:10,144 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 18:38:13,637 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:38:13,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:13,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:38:13,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:13,796 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 9 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:13,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1648536920] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:13,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:13,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-08-21 18:38:13,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518302437] [2021-08-21 18:38:13,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:38:13,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:13,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:38:13,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:38:13,797 INFO L87 Difference]: Start difference. First operand 816 states and 1828 transitions. Second operand has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:14,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:14,082 INFO L93 Difference]: Finished difference Result 1551 states and 3128 transitions. [2021-08-21 18:38:14,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:38:14,082 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:38:14,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:14,084 INFO L225 Difference]: With dead ends: 1551 [2021-08-21 18:38:14,084 INFO L226 Difference]: Without dead ends: 1535 [2021-08-21 18:38:14,085 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 252.5ms TimeCoverageRelationStatistics Valid=291, Invalid=899, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:38:14,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1535 states. [2021-08-21 18:38:14,095 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1535 to 1044. [2021-08-21 18:38:14,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 2.2655800575263663) internal successors, (2363), 1043 states have internal predecessors, (2363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:14,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 2363 transitions. [2021-08-21 18:38:14,097 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 2363 transitions. Word has length 28 [2021-08-21 18:38:14,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:14,097 INFO L470 AbstractCegarLoop]: Abstraction has 1044 states and 2363 transitions. [2021-08-21 18:38:14,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.7058823529411766) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:14,097 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 2363 transitions. [2021-08-21 18:38:14,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:14,099 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:14,099 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:14,126 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-08-21 18:38:14,299 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-08-21 18:38:14,299 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:14,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:14,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1289611128, now seen corresponding path program 30 times [2021-08-21 18:38:14,300 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:14,300 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365897847] [2021-08-21 18:38:14,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:14,300 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:14,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:14,354 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 18:38:14,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:14,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365897847] [2021-08-21 18:38:14,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365897847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:14,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068209244] [2021-08-21 18:38:14,354 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:38:14,354 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:14,354 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:14,355 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 18:38:14,355 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 18:38:17,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:38:17,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:17,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:38:17,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:17,989 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 18:38:17,989 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068209244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:17,989 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:17,989 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 18:38:17,989 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416328623] [2021-08-21 18:38:17,989 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:38:17,990 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:17,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:38:17,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:38:17,990 INFO L87 Difference]: Start difference. First operand 1044 states and 2363 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:18,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:18,357 INFO L93 Difference]: Finished difference Result 1457 states and 2934 transitions. [2021-08-21 18:38:18,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:38:18,357 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:38:18,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:18,359 INFO L225 Difference]: With dead ends: 1457 [2021-08-21 18:38:18,359 INFO L226 Difference]: Without dead ends: 1445 [2021-08-21 18:38:18,359 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 271.1ms TimeCoverageRelationStatistics Valid=334, Invalid=788, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:38:18,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1445 states. [2021-08-21 18:38:18,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1445 to 1056. [2021-08-21 18:38:18,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1056 states, 1055 states have (on average 2.272037914691943) internal successors, (2397), 1055 states have internal predecessors, (2397), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:18,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1056 states to 1056 states and 2397 transitions. [2021-08-21 18:38:18,374 INFO L78 Accepts]: Start accepts. Automaton has 1056 states and 2397 transitions. Word has length 28 [2021-08-21 18:38:18,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:18,374 INFO L470 AbstractCegarLoop]: Abstraction has 1056 states and 2397 transitions. [2021-08-21 18:38:18,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:18,374 INFO L276 IsEmpty]: Start isEmpty. Operand 1056 states and 2397 transitions. [2021-08-21 18:38:18,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:18,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:18,375 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:18,408 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-08-21 18:38:18,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 18:38:18,601 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:18,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:18,601 INFO L82 PathProgramCache]: Analyzing trace with hash -1475240072, now seen corresponding path program 31 times [2021-08-21 18:38:18,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:18,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28413376] [2021-08-21 18:38:18,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:18,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:18,616 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:18,654 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:18,654 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:18,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28413376] [2021-08-21 18:38:18,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28413376] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:18,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1103789665] [2021-08-21 18:38:18,655 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:38:18,655 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:18,655 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:18,656 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 18:38:18,657 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 18:38:22,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:22,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:38:22,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:22,366 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:22,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1103789665] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:22,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:22,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 18:38:22,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56387578] [2021-08-21 18:38:22,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:38:22,367 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:22,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:38:22,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:38:22,367 INFO L87 Difference]: Start difference. First operand 1056 states and 2397 transitions. Second operand has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:22,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:22,760 INFO L93 Difference]: Finished difference Result 1421 states and 2894 transitions. [2021-08-21 18:38:22,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:38:22,760 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:38:22,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:22,762 INFO L225 Difference]: With dead ends: 1421 [2021-08-21 18:38:22,762 INFO L226 Difference]: Without dead ends: 1407 [2021-08-21 18:38:22,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 288.4ms TimeCoverageRelationStatistics Valid=360, Invalid=900, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:38:22,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1407 states. [2021-08-21 18:38:22,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1407 to 1044. [2021-08-21 18:38:22,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1044 states, 1043 states have (on average 2.2828379674017256) internal successors, (2381), 1043 states have internal predecessors, (2381), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:22,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1044 states to 1044 states and 2381 transitions. [2021-08-21 18:38:22,777 INFO L78 Accepts]: Start accepts. Automaton has 1044 states and 2381 transitions. Word has length 28 [2021-08-21 18:38:22,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:22,777 INFO L470 AbstractCegarLoop]: Abstraction has 1044 states and 2381 transitions. [2021-08-21 18:38:22,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8) internal successors, (42), 15 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:22,777 INFO L276 IsEmpty]: Start isEmpty. Operand 1044 states and 2381 transitions. [2021-08-21 18:38:22,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:22,779 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:22,779 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:22,805 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-08-21 18:38:22,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:22,989 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:22,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:22,989 INFO L82 PathProgramCache]: Analyzing trace with hash -750794888, now seen corresponding path program 32 times [2021-08-21 18:38:22,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:22,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1156795112] [2021-08-21 18:38:22,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:22,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:23,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:23,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:23,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1156795112] [2021-08-21 18:38:23,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1156795112] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:23,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1813325726] [2021-08-21 18:38:23,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:38:23,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:23,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:23,045 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 18:38:23,046 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 18:38:26,572 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:38:26,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:26,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:38:26,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:26,687 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:26,687 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1813325726] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:26,687 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:26,687 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:38:26,687 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525733950] [2021-08-21 18:38:26,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:38:26,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:26,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:38:26,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:38:26,688 INFO L87 Difference]: Start difference. First operand 1044 states and 2381 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:26,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:26,967 INFO L93 Difference]: Finished difference Result 1522 states and 3089 transitions. [2021-08-21 18:38:26,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:38:26,967 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:38:26,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:26,970 INFO L225 Difference]: With dead ends: 1522 [2021-08-21 18:38:26,970 INFO L226 Difference]: Without dead ends: 1510 [2021-08-21 18:38:26,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 203.5ms TimeCoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:38:26,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1510 states. [2021-08-21 18:38:26,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1510 to 1052. [2021-08-21 18:38:26,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1052 states, 1051 states have (on average 2.291151284490961) internal successors, (2408), 1051 states have internal predecessors, (2408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:26,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1052 states to 1052 states and 2408 transitions. [2021-08-21 18:38:26,985 INFO L78 Accepts]: Start accepts. Automaton has 1052 states and 2408 transitions. Word has length 28 [2021-08-21 18:38:26,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:26,985 INFO L470 AbstractCegarLoop]: Abstraction has 1052 states and 2408 transitions. [2021-08-21 18:38:26,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:26,986 INFO L276 IsEmpty]: Start isEmpty. Operand 1052 states and 2408 transitions. [2021-08-21 18:38:26,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:26,987 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:26,987 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:27,017 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 18:38:27,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:27,193 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:27,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:27,193 INFO L82 PathProgramCache]: Analyzing trace with hash 302925816, now seen corresponding path program 33 times [2021-08-21 18:38:27,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:27,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872277311] [2021-08-21 18:38:27,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:27,194 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:27,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:27,259 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:38:27,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:27,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872277311] [2021-08-21 18:38:27,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872277311] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:27,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174868683] [2021-08-21 18:38:27,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:38:27,259 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:27,259 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:27,261 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 18:38:27,284 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 18:38:30,794 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:38:30,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:30,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:38:30,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:30,907 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:38:30,907 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174868683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:30,907 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:30,907 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 10 [2021-08-21 18:38:30,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66319524] [2021-08-21 18:38:30,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:38:30,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:30,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:38:30,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:38:30,908 INFO L87 Difference]: Start difference. First operand 1052 states and 2408 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:30,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:30,992 INFO L93 Difference]: Finished difference Result 1191 states and 2593 transitions. [2021-08-21 18:38:30,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:38:30,993 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:38:30,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:30,994 INFO L225 Difference]: With dead ends: 1191 [2021-08-21 18:38:30,995 INFO L226 Difference]: Without dead ends: 1191 [2021-08-21 18:38:30,995 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 67.9ms TimeCoverageRelationStatistics Valid=82, Invalid=128, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:38:30,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1191 states. [2021-08-21 18:38:31,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1191 to 977. [2021-08-21 18:38:31,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 977 states, 976 states have (on average 2.2879098360655736) internal successors, (2233), 976 states have internal predecessors, (2233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:31,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 977 states to 977 states and 2233 transitions. [2021-08-21 18:38:31,007 INFO L78 Accepts]: Start accepts. Automaton has 977 states and 2233 transitions. Word has length 28 [2021-08-21 18:38:31,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:31,007 INFO L470 AbstractCegarLoop]: Abstraction has 977 states and 2233 transitions. [2021-08-21 18:38:31,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:31,007 INFO L276 IsEmpty]: Start isEmpty. Operand 977 states and 2233 transitions. [2021-08-21 18:38:31,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:31,008 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:31,008 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:31,036 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-08-21 18:38:31,224 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:31,225 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:31,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:31,225 INFO L82 PathProgramCache]: Analyzing trace with hash -241891208, now seen corresponding path program 34 times [2021-08-21 18:38:31,225 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:31,225 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344065470] [2021-08-21 18:38:31,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:31,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:31,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:31,281 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:31,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:31,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344065470] [2021-08-21 18:38:31,281 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344065470] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:31,281 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [795631767] [2021-08-21 18:38:31,281 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:38:31,281 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:31,282 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:31,282 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 18:38:31,283 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 18:38:34,892 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:38:34,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:34,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:38:34,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:35,055 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:35,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [795631767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:35,055 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:35,055 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-08-21 18:38:35,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837875668] [2021-08-21 18:38:35,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:38:35,056 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:35,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:38:35,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:38:35,056 INFO L87 Difference]: Start difference. First operand 977 states and 2233 transitions. Second operand has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:35,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:35,755 INFO L93 Difference]: Finished difference Result 2931 states and 5906 transitions. [2021-08-21 18:38:35,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 18:38:35,755 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:38:35,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:35,760 INFO L225 Difference]: With dead ends: 2931 [2021-08-21 18:38:35,760 INFO L226 Difference]: Without dead ends: 2931 [2021-08-21 18:38:35,761 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1406 ImplicationChecksByTransitivity, 490.5ms TimeCoverageRelationStatistics Valid=827, Invalid=2955, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:38:35,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2931 states. [2021-08-21 18:38:35,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2931 to 918. [2021-08-21 18:38:35,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 918 states, 917 states have (on average 2.261723009814613) internal successors, (2074), 917 states have internal predecessors, (2074), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:35,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 918 states to 918 states and 2074 transitions. [2021-08-21 18:38:35,780 INFO L78 Accepts]: Start accepts. Automaton has 918 states and 2074 transitions. Word has length 28 [2021-08-21 18:38:35,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:35,780 INFO L470 AbstractCegarLoop]: Abstraction has 918 states and 2074 transitions. [2021-08-21 18:38:35,780 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.066666666666667) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:35,780 INFO L276 IsEmpty]: Start isEmpty. Operand 918 states and 2074 transitions. [2021-08-21 18:38:35,781 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:35,781 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:35,781 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:35,809 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-08-21 18:38:35,996 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 18:38:35,997 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:35,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:35,997 INFO L82 PathProgramCache]: Analyzing trace with hash 15931256, now seen corresponding path program 35 times [2021-08-21 18:38:35,997 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:35,997 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020415443] [2021-08-21 18:38:35,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:35,997 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:36,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:36,069 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 18:38:36,069 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:36,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020415443] [2021-08-21 18:38:36,069 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020415443] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:36,069 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748201800] [2021-08-21 18:38:36,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:38:36,069 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:36,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:36,073 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 18:38:36,101 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 18:38:39,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:38:39,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:39,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:38:39,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:39,771 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 18:38:39,771 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748201800] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:39,771 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:39,771 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:38:39,772 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470031794] [2021-08-21 18:38:39,772 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:38:39,772 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:39,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:38:39,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:38:39,772 INFO L87 Difference]: Start difference. First operand 918 states and 2074 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:40,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:40,095 INFO L93 Difference]: Finished difference Result 1445 states and 2936 transitions. [2021-08-21 18:38:40,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:38:40,095 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:38:40,095 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:40,110 INFO L225 Difference]: With dead ends: 1445 [2021-08-21 18:38:40,110 INFO L226 Difference]: Without dead ends: 1441 [2021-08-21 18:38:40,110 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 284 ImplicationChecksByTransitivity, 226.8ms TimeCoverageRelationStatistics Valid=301, Invalid=821, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:38:40,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1441 states. [2021-08-21 18:38:40,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1441 to 986. [2021-08-21 18:38:40,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 986 states, 985 states have (on average 2.2923857868020305) internal successors, (2258), 985 states have internal predecessors, (2258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:40,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 986 states to 986 states and 2258 transitions. [2021-08-21 18:38:40,125 INFO L78 Accepts]: Start accepts. Automaton has 986 states and 2258 transitions. Word has length 28 [2021-08-21 18:38:40,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:40,125 INFO L470 AbstractCegarLoop]: Abstraction has 986 states and 2258 transitions. [2021-08-21 18:38:40,125 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:40,125 INFO L276 IsEmpty]: Start isEmpty. Operand 986 states and 2258 transitions. [2021-08-21 18:38:40,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:40,126 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:40,126 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:40,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-08-21 18:38:40,341 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2021-08-21 18:38:40,341 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:40,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:40,341 INFO L82 PathProgramCache]: Analyzing trace with hash -1556453512, now seen corresponding path program 36 times [2021-08-21 18:38:40,341 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:40,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107599345] [2021-08-21 18:38:40,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:40,342 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:40,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:40,395 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:40,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:40,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107599345] [2021-08-21 18:38:40,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107599345] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:40,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502858459] [2021-08-21 18:38:40,395 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:38:40,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:40,395 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:40,396 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 18:38:40,397 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 18:38:43,958 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:38:43,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:43,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:38:43,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:44,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502858459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:44,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:44,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:38:44,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [837261362] [2021-08-21 18:38:44,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:38:44,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:44,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:38:44,078 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:38:44,078 INFO L87 Difference]: Start difference. First operand 986 states and 2258 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:44,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:44,482 INFO L93 Difference]: Finished difference Result 1475 states and 3006 transitions. [2021-08-21 18:38:44,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:38:44,482 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:38:44,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:44,484 INFO L225 Difference]: With dead ends: 1475 [2021-08-21 18:38:44,484 INFO L226 Difference]: Without dead ends: 1475 [2021-08-21 18:38:44,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 266.1ms TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:38:44,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-08-21 18:38:44,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 921. [2021-08-21 18:38:44,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 921 states, 920 states have (on average 2.273913043478261) internal successors, (2092), 920 states have internal predecessors, (2092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:44,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 921 states to 921 states and 2092 transitions. [2021-08-21 18:38:44,497 INFO L78 Accepts]: Start accepts. Automaton has 921 states and 2092 transitions. Word has length 28 [2021-08-21 18:38:44,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:44,497 INFO L470 AbstractCegarLoop]: Abstraction has 921 states and 2092 transitions. [2021-08-21 18:38:44,497 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:44,498 INFO L276 IsEmpty]: Start isEmpty. Operand 921 states and 2092 transitions. [2021-08-21 18:38:44,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:44,499 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:44,499 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:44,527 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-08-21 18:38:44,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-21 18:38:44,699 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:44,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:44,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1279463288, now seen corresponding path program 37 times [2021-08-21 18:38:44,700 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:44,700 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578116621] [2021-08-21 18:38:44,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:44,700 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:44,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:44,750 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:44,750 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:44,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578116621] [2021-08-21 18:38:44,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578116621] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:44,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487064115] [2021-08-21 18:38:44,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:38:44,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:44,750 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:44,751 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 18:38:44,751 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-08-21 18:38:48,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:48,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:38:48,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:48,483 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:48,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487064115] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:48,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:48,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-21 18:38:48,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1047462421] [2021-08-21 18:38:48,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:38:48,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:48,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:38:48,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:38:48,484 INFO L87 Difference]: Start difference. First operand 921 states and 2092 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:48,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:48,941 INFO L93 Difference]: Finished difference Result 1477 states and 3065 transitions. [2021-08-21 18:38:48,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:38:48,941 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:38:48,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:48,943 INFO L225 Difference]: With dead ends: 1477 [2021-08-21 18:38:48,943 INFO L226 Difference]: Without dead ends: 1475 [2021-08-21 18:38:48,943 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 285.2ms TimeCoverageRelationStatistics Valid=354, Invalid=1052, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:38:48,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-08-21 18:38:48,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 1057. [2021-08-21 18:38:48,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1056 states have (on average 2.28125) internal successors, (2409), 1056 states have internal predecessors, (2409), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:48,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 2409 transitions. [2021-08-21 18:38:48,957 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 2409 transitions. Word has length 28 [2021-08-21 18:38:48,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:48,957 INFO L470 AbstractCegarLoop]: Abstraction has 1057 states and 2409 transitions. [2021-08-21 18:38:48,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:48,957 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 2409 transitions. [2021-08-21 18:38:48,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:48,958 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:48,958 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:48,985 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 18:38:49,184 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:49,185 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:49,185 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:49,185 INFO L82 PathProgramCache]: Analyzing trace with hash -907933960, now seen corresponding path program 24 times [2021-08-21 18:38:49,185 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:49,185 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97710015] [2021-08-21 18:38:49,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:49,185 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:49,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:49,243 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 8 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:49,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:49,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97710015] [2021-08-21 18:38:49,243 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [97710015] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:49,243 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127433953] [2021-08-21 18:38:49,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:38:49,243 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:49,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:49,244 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 18:38:49,272 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 18:38:52,846 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:38:52,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:52,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:38:52,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:53,001 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:53,001 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127433953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:53,001 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:53,001 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-21 18:38:53,001 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532921804] [2021-08-21 18:38:53,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:38:53,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:53,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:38:53,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:38:53,002 INFO L87 Difference]: Start difference. First operand 1057 states and 2409 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:53,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:53,299 INFO L93 Difference]: Finished difference Result 1982 states and 4203 transitions. [2021-08-21 18:38:53,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:38:53,299 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:38:53,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:53,302 INFO L225 Difference]: With dead ends: 1982 [2021-08-21 18:38:53,302 INFO L226 Difference]: Without dead ends: 1970 [2021-08-21 18:38:53,302 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 233.1ms TimeCoverageRelationStatistics Valid=306, Invalid=884, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:38:53,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1970 states. [2021-08-21 18:38:53,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1970 to 1476. [2021-08-21 18:38:53,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1476 states, 1475 states have (on average 2.328813559322034) internal successors, (3435), 1475 states have internal predecessors, (3435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:53,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1476 states to 1476 states and 3435 transitions. [2021-08-21 18:38:53,321 INFO L78 Accepts]: Start accepts. Automaton has 1476 states and 3435 transitions. Word has length 28 [2021-08-21 18:38:53,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:53,321 INFO L470 AbstractCegarLoop]: Abstraction has 1476 states and 3435 transitions. [2021-08-21 18:38:53,321 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:53,321 INFO L276 IsEmpty]: Start isEmpty. Operand 1476 states and 3435 transitions. [2021-08-21 18:38:53,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:53,334 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:53,334 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:53,363 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 18:38:53,548 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:53,549 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:53,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:53,549 INFO L82 PathProgramCache]: Analyzing trace with hash -1823037576, now seen corresponding path program 38 times [2021-08-21 18:38:53,549 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:53,549 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637519524] [2021-08-21 18:38:53,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:53,549 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:53,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:53,599 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:53,599 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:53,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637519524] [2021-08-21 18:38:53,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637519524] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:53,599 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451953841] [2021-08-21 18:38:53,599 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:38:53,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:53,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:53,601 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 18:38:53,602 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 18:38:57,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:38:57,293 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:57,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:38:57,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:57,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451953841] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:57,437 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:57,437 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-21 18:38:57,437 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006861356] [2021-08-21 18:38:57,437 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:38:57,437 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:57,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:38:57,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:38:57,437 INFO L87 Difference]: Start difference. First operand 1476 states and 3435 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:58,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:58,051 INFO L93 Difference]: Finished difference Result 2068 states and 4415 transitions. [2021-08-21 18:38:58,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 18:38:58,052 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:38:58,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:58,054 INFO L225 Difference]: With dead ends: 2068 [2021-08-21 18:38:58,054 INFO L226 Difference]: Without dead ends: 2068 [2021-08-21 18:38:58,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 656 ImplicationChecksByTransitivity, 401.4ms TimeCoverageRelationStatistics Valid=597, Invalid=1565, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:38:58,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2068 states. [2021-08-21 18:38:58,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2068 to 1484. [2021-08-21 18:38:58,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1484 states, 1483 states have (on average 2.322993931220499) internal successors, (3445), 1483 states have internal predecessors, (3445), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:58,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1484 states to 1484 states and 3445 transitions. [2021-08-21 18:38:58,073 INFO L78 Accepts]: Start accepts. Automaton has 1484 states and 3445 transitions. Word has length 28 [2021-08-21 18:38:58,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:58,073 INFO L470 AbstractCegarLoop]: Abstraction has 1484 states and 3445 transitions. [2021-08-21 18:38:58,073 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:58,073 INFO L276 IsEmpty]: Start isEmpty. Operand 1484 states and 3445 transitions. [2021-08-21 18:38:58,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:58,075 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:58,075 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:58,102 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 18:38:58,275 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-08-21 18:38:58,276 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:58,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:58,276 INFO L82 PathProgramCache]: Analyzing trace with hash 205561912, now seen corresponding path program 39 times [2021-08-21 18:38:58,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:58,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91689053] [2021-08-21 18:38:58,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:58,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:58,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:58,330 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:58,331 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:58,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91689053] [2021-08-21 18:38:58,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91689053] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:58,331 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852082119] [2021-08-21 18:38:58,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:38:58,331 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:58,331 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:58,332 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 18:38:58,332 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 18:39:01,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:39:01,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:01,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:39:01,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:02,096 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:02,096 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852082119] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:02,096 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:02,096 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 18:39:02,096 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006573607] [2021-08-21 18:39:02,097 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:39:02,097 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:02,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:39:02,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:39:02,097 INFO L87 Difference]: Start difference. First operand 1484 states and 3445 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:02,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:02,275 INFO L93 Difference]: Finished difference Result 2313 states and 5129 transitions. [2021-08-21 18:39:02,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:39:02,276 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:39:02,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:02,278 INFO L225 Difference]: With dead ends: 2313 [2021-08-21 18:39:02,278 INFO L226 Difference]: Without dead ends: 2301 [2021-08-21 18:39:02,278 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 128.7ms TimeCoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:39:02,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2301 states. [2021-08-21 18:39:02,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2301 to 1863. [2021-08-21 18:39:02,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1863 states, 1862 states have (on average 2.3340494092373794) internal successors, (4346), 1862 states have internal predecessors, (4346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:02,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1863 states to 1863 states and 4346 transitions. [2021-08-21 18:39:02,299 INFO L78 Accepts]: Start accepts. Automaton has 1863 states and 4346 transitions. Word has length 28 [2021-08-21 18:39:02,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:02,299 INFO L470 AbstractCegarLoop]: Abstraction has 1863 states and 4346 transitions. [2021-08-21 18:39:02,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:02,300 INFO L276 IsEmpty]: Start isEmpty. Operand 1863 states and 4346 transitions. [2021-08-21 18:39:02,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:02,302 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:02,302 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:39:02,328 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 18:39:02,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-21 18:39:02,512 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:02,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:02,512 INFO L82 PathProgramCache]: Analyzing trace with hash 1005529464, now seen corresponding path program 40 times [2021-08-21 18:39:02,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:02,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123385821] [2021-08-21 18:39:02,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:02,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:02,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:02,569 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:39:02,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:02,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123385821] [2021-08-21 18:39:02,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [123385821] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:02,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143489849] [2021-08-21 18:39:02,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:39:02,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:02,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:02,570 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 18:39:02,571 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 18:39:06,201 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:39:06,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:06,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:39:06,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:06,305 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:39:06,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143489849] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:06,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:06,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-21 18:39:06,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120107554] [2021-08-21 18:39:06,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:39:06,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:06,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:39:06,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:39:06,306 INFO L87 Difference]: Start difference. First operand 1863 states and 4346 transitions. Second operand has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:06,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:06,392 INFO L93 Difference]: Finished difference Result 2001 states and 4607 transitions. [2021-08-21 18:39:06,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:39:06,392 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:39:06,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:06,394 INFO L225 Difference]: With dead ends: 2001 [2021-08-21 18:39:06,394 INFO L226 Difference]: Without dead ends: 2001 [2021-08-21 18:39:06,395 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=90, Invalid=150, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:39:06,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2001 states. [2021-08-21 18:39:06,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2001 to 1957. [2021-08-21 18:39:06,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1957 states, 1956 states have (on average 2.317484662576687) internal successors, (4533), 1956 states have internal predecessors, (4533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:06,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1957 states to 1957 states and 4533 transitions. [2021-08-21 18:39:06,414 INFO L78 Accepts]: Start accepts. Automaton has 1957 states and 4533 transitions. Word has length 28 [2021-08-21 18:39:06,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:06,414 INFO L470 AbstractCegarLoop]: Abstraction has 1957 states and 4533 transitions. [2021-08-21 18:39:06,414 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.8) internal successors, (38), 10 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:06,414 INFO L276 IsEmpty]: Start isEmpty. Operand 1957 states and 4533 transitions. [2021-08-21 18:39:06,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:06,417 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:06,417 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:39:06,443 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 18:39:06,617 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:06,617 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:06,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:06,617 INFO L82 PathProgramCache]: Analyzing trace with hash -717941764, now seen corresponding path program 41 times [2021-08-21 18:39:06,618 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:06,618 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853763826] [2021-08-21 18:39:06,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:06,618 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:06,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:06,689 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 18:39:06,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:06,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853763826] [2021-08-21 18:39:06,690 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1853763826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:06,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497139438] [2021-08-21 18:39:06,690 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:39:06,690 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:06,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:06,691 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 18:39:06,691 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 18:39:10,404 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:39:10,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:10,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:39:10,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:10,517 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 18:39:10,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497139438] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:10,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:10,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 18:39:10,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136560637] [2021-08-21 18:39:10,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:39:10,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:10,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:39:10,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:39:10,519 INFO L87 Difference]: Start difference. First operand 1957 states and 4533 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:10,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:10,715 INFO L93 Difference]: Finished difference Result 2405 states and 5405 transitions. [2021-08-21 18:39:10,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:39:10,716 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:39:10,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:10,718 INFO L225 Difference]: With dead ends: 2405 [2021-08-21 18:39:10,718 INFO L226 Difference]: Without dead ends: 2399 [2021-08-21 18:39:10,719 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 121.2ms TimeCoverageRelationStatistics Valid=130, Invalid=376, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:39:10,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2399 states. [2021-08-21 18:39:10,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2399 to 2249. [2021-08-21 18:39:10,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2249 states, 2248 states have (on average 2.328291814946619) internal successors, (5234), 2248 states have internal predecessors, (5234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:10,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2249 states to 2249 states and 5234 transitions. [2021-08-21 18:39:10,742 INFO L78 Accepts]: Start accepts. Automaton has 2249 states and 5234 transitions. Word has length 28 [2021-08-21 18:39:10,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:10,742 INFO L470 AbstractCegarLoop]: Abstraction has 2249 states and 5234 transitions. [2021-08-21 18:39:10,742 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:10,742 INFO L276 IsEmpty]: Start isEmpty. Operand 2249 states and 5234 transitions. [2021-08-21 18:39:10,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:10,745 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:10,745 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:39:10,773 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 18:39:10,960 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-08-21 18:39:10,960 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:10,960 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:10,961 INFO L82 PathProgramCache]: Analyzing trace with hash 2004640764, now seen corresponding path program 42 times [2021-08-21 18:39:10,961 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:10,961 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466620619] [2021-08-21 18:39:10,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:10,961 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:10,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:11,010 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:39:11,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:11,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466620619] [2021-08-21 18:39:11,010 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466620619] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:11,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251800397] [2021-08-21 18:39:11,010 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:39:11,010 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:11,010 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:11,011 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 18:39:11,012 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 18:39:14,678 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:39:14,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:14,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:39:14,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:14,788 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:39:14,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251800397] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:14,788 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:14,788 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 11 [2021-08-21 18:39:14,789 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758072148] [2021-08-21 18:39:14,789 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:39:14,789 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:14,789 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:39:14,789 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:39:14,789 INFO L87 Difference]: Start difference. First operand 2249 states and 5234 transitions. Second operand has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:14,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:14,992 INFO L93 Difference]: Finished difference Result 2380 states and 5392 transitions. [2021-08-21 18:39:14,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:39:14,993 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:39:14,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:14,995 INFO L225 Difference]: With dead ends: 2380 [2021-08-21 18:39:14,995 INFO L226 Difference]: Without dead ends: 2380 [2021-08-21 18:39:14,995 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 140.8ms TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:39:14,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2380 states. [2021-08-21 18:39:15,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2380 to 2189. [2021-08-21 18:39:15,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2189 states, 2188 states have (on average 2.330895795246801) internal successors, (5100), 2188 states have internal predecessors, (5100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:15,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2189 states to 2189 states and 5100 transitions. [2021-08-21 18:39:15,019 INFO L78 Accepts]: Start accepts. Automaton has 2189 states and 5100 transitions. Word has length 28 [2021-08-21 18:39:15,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:15,019 INFO L470 AbstractCegarLoop]: Abstraction has 2189 states and 5100 transitions. [2021-08-21 18:39:15,019 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.3636363636363638) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:15,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2189 states and 5100 transitions. [2021-08-21 18:39:15,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:15,022 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:15,022 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:39:15,048 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 18:39:15,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 18:39:15,222 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:15,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:15,222 INFO L82 PathProgramCache]: Analyzing trace with hash 1646788544, now seen corresponding path program 43 times [2021-08-21 18:39:15,222 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:15,222 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475872602] [2021-08-21 18:39:15,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:15,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:15,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:15,284 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:15,284 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:15,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475872602] [2021-08-21 18:39:15,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475872602] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:15,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39051122] [2021-08-21 18:39:15,284 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:39:15,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:15,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:15,285 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 18:39:15,286 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 18:39:19,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:19,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:39:19,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:19,115 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:19,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [39051122] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:19,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:19,116 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 18:39:19,116 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894113792] [2021-08-21 18:39:19,116 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:39:19,116 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:19,116 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:39:19,116 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:39:19,116 INFO L87 Difference]: Start difference. First operand 2189 states and 5100 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:19,395 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:19,395 INFO L93 Difference]: Finished difference Result 2463 states and 5649 transitions. [2021-08-21 18:39:19,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:39:19,395 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:39:19,395 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:19,398 INFO L225 Difference]: With dead ends: 2463 [2021-08-21 18:39:19,398 INFO L226 Difference]: Without dead ends: 2463 [2021-08-21 18:39:19,398 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 178.7ms TimeCoverageRelationStatistics Valid=258, Invalid=612, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:39:19,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2463 states. [2021-08-21 18:39:19,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2463 to 2256. [2021-08-21 18:39:19,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2256 states, 2255 states have (on average 2.3197339246119735) internal successors, (5231), 2255 states have internal predecessors, (5231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:19,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2256 states to 2256 states and 5231 transitions. [2021-08-21 18:39:19,433 INFO L78 Accepts]: Start accepts. Automaton has 2256 states and 5231 transitions. Word has length 28 [2021-08-21 18:39:19,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:19,433 INFO L470 AbstractCegarLoop]: Abstraction has 2256 states and 5231 transitions. [2021-08-21 18:39:19,433 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 12 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:19,433 INFO L276 IsEmpty]: Start isEmpty. Operand 2256 states and 5231 transitions. [2021-08-21 18:39:19,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:19,436 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:19,436 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:39:19,463 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-08-21 18:39:19,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-21 18:39:19,637 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:19,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:19,637 INFO L82 PathProgramCache]: Analyzing trace with hash -527973576, now seen corresponding path program 44 times [2021-08-21 18:39:19,637 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:19,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1929999723] [2021-08-21 18:39:19,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:19,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:19,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:19,704 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:39:19,704 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:19,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1929999723] [2021-08-21 18:39:19,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1929999723] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:19,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255530888] [2021-08-21 18:39:19,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:39:19,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:19,704 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:19,705 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 18:39:19,732 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 18:39:23,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:39:23,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:23,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:39:23,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:23,547 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:23,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255530888] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:23,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:23,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-21 18:39:23,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847094172] [2021-08-21 18:39:23,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:39:23,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:23,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:39:23,548 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:39:23,548 INFO L87 Difference]: Start difference. First operand 2256 states and 5231 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:24,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:24,190 INFO L93 Difference]: Finished difference Result 4611 states and 9758 transitions. [2021-08-21 18:39:24,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 18:39:24,190 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:39:24,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:24,196 INFO L225 Difference]: With dead ends: 4611 [2021-08-21 18:39:24,196 INFO L226 Difference]: Without dead ends: 4611 [2021-08-21 18:39:24,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1087 ImplicationChecksByTransitivity, 459.1ms TimeCoverageRelationStatistics Valid=723, Invalid=2357, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:39:24,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4611 states. [2021-08-21 18:39:24,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4611 to 2330. [2021-08-21 18:39:24,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2330 states, 2329 states have (on average 2.3220266208673253) internal successors, (5408), 2329 states have internal predecessors, (5408), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:24,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2330 states to 2330 states and 5408 transitions. [2021-08-21 18:39:24,231 INFO L78 Accepts]: Start accepts. Automaton has 2330 states and 5408 transitions. Word has length 28 [2021-08-21 18:39:24,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:24,232 INFO L470 AbstractCegarLoop]: Abstraction has 2330 states and 5408 transitions. [2021-08-21 18:39:24,232 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:24,232 INFO L276 IsEmpty]: Start isEmpty. Operand 2330 states and 5408 transitions. [2021-08-21 18:39:24,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:24,234 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:24,234 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:39:24,262 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 18:39:24,435 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2021-08-21 18:39:24,435 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:24,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:24,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1579596472, now seen corresponding path program 25 times [2021-08-21 18:39:24,435 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:24,435 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488973100] [2021-08-21 18:39:24,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:24,435 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:24,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:39:24,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:24,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488973100] [2021-08-21 18:39:24,496 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488973100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:24,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102540479] [2021-08-21 18:39:24,496 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:39:24,496 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:24,496 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:24,497 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 18:39:24,498 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 18:39:28,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:28,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:39:28,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:28,340 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:28,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [102540479] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:28,341 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:28,341 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 15 [2021-08-21 18:39:28,341 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1948519835] [2021-08-21 18:39:28,341 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:39:28,341 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:28,341 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:39:28,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:39:28,341 INFO L87 Difference]: Start difference. First operand 2330 states and 5408 transitions. Second operand has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:28,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:28,860 INFO L93 Difference]: Finished difference Result 4333 states and 9167 transitions. [2021-08-21 18:39:28,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 18:39:28,860 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:39:28,860 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:28,865 INFO L225 Difference]: With dead ends: 4333 [2021-08-21 18:39:28,865 INFO L226 Difference]: Without dead ends: 4333 [2021-08-21 18:39:28,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 645 ImplicationChecksByTransitivity, 359.8ms TimeCoverageRelationStatistics Valid=547, Invalid=1523, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:39:28,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-08-21 18:39:28,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 2328. [2021-08-21 18:39:28,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2328 states, 2327 states have (on average 2.3214439192092824) internal successors, (5402), 2327 states have internal predecessors, (5402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:28,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2328 states to 2328 states and 5402 transitions. [2021-08-21 18:39:28,897 INFO L78 Accepts]: Start accepts. Automaton has 2328 states and 5402 transitions. Word has length 28 [2021-08-21 18:39:28,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:28,897 INFO L470 AbstractCegarLoop]: Abstraction has 2328 states and 5402 transitions. [2021-08-21 18:39:28,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.933333333333333) internal successors, (44), 15 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:28,897 INFO L276 IsEmpty]: Start isEmpty. Operand 2328 states and 5402 transitions. [2021-08-21 18:39:28,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:28,900 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:28,900 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:39:28,927 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 18:39:29,100 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:29,101 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:29,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:29,101 INFO L82 PathProgramCache]: Analyzing trace with hash 2088628792, now seen corresponding path program 45 times [2021-08-21 18:39:29,101 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:29,101 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974980098] [2021-08-21 18:39:29,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:29,101 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:29,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:29,149 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:39:29,149 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:29,149 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974980098] [2021-08-21 18:39:29,149 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974980098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:29,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079519997] [2021-08-21 18:39:29,150 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:39:29,150 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:29,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:29,150 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 18:39:29,151 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 18:39:32,870 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:39:32,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:32,871 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:39:32,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:33,018 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 18:39:33,018 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079519997] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:33,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:33,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-21 18:39:33,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [228785458] [2021-08-21 18:39:33,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:39:33,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:33,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:39:33,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:39:33,019 INFO L87 Difference]: Start difference. First operand 2328 states and 5402 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:33,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:33,330 INFO L93 Difference]: Finished difference Result 3043 states and 6711 transitions. [2021-08-21 18:39:33,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:39:33,330 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:39:33,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:33,333 INFO L225 Difference]: With dead ends: 3043 [2021-08-21 18:39:33,333 INFO L226 Difference]: Without dead ends: 3037 [2021-08-21 18:39:33,334 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 201.8ms TimeCoverageRelationStatistics Valid=215, Invalid=655, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:39:33,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3037 states. [2021-08-21 18:39:33,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3037 to 2649. [2021-08-21 18:39:33,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2649 states, 2648 states have (on average 2.328549848942598) internal successors, (6166), 2648 states have internal predecessors, (6166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:33,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2649 states to 2649 states and 6166 transitions. [2021-08-21 18:39:33,362 INFO L78 Accepts]: Start accepts. Automaton has 2649 states and 6166 transitions. Word has length 28 [2021-08-21 18:39:33,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:33,362 INFO L470 AbstractCegarLoop]: Abstraction has 2649 states and 6166 transitions. [2021-08-21 18:39:33,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:33,362 INFO L276 IsEmpty]: Start isEmpty. Operand 2649 states and 6166 transitions. [2021-08-21 18:39:33,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:33,365 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:33,365 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:39:33,393 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 18:39:33,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:33,566 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:33,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:33,566 INFO L82 PathProgramCache]: Analyzing trace with hash 238881208, now seen corresponding path program 26 times [2021-08-21 18:39:33,566 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:33,566 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926068492] [2021-08-21 18:39:33,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:33,566 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:33,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:33,621 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:39:33,622 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:33,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926068492] [2021-08-21 18:39:33,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1926068492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:33,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927917277] [2021-08-21 18:39:33,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:39:33,622 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:33,622 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:33,623 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 18:39:33,623 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 18:39:37,343 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:39:37,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:37,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:39:37,344 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:37,498 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 6 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:37,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [927917277] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:37,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:37,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 15 [2021-08-21 18:39:37,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445094340] [2021-08-21 18:39:37,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:39:37,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:37,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:39:37,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=189, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:39:37,499 INFO L87 Difference]: Start difference. First operand 2649 states and 6166 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:37,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:37,765 INFO L93 Difference]: Finished difference Result 3147 states and 7039 transitions. [2021-08-21 18:39:37,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:39:37,765 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:39:37,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:37,769 INFO L225 Difference]: With dead ends: 3147 [2021-08-21 18:39:37,769 INFO L226 Difference]: Without dead ends: 3141 [2021-08-21 18:39:37,769 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 209.3ms TimeCoverageRelationStatistics Valid=223, Invalid=769, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:39:37,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3141 states. [2021-08-21 18:39:37,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3141 to 2584. [2021-08-21 18:39:37,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2584 states, 2583 states have (on average 2.326751838946961) internal successors, (6010), 2583 states have internal predecessors, (6010), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:37,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2584 states to 2584 states and 6010 transitions. [2021-08-21 18:39:37,796 INFO L78 Accepts]: Start accepts. Automaton has 2584 states and 6010 transitions. Word has length 28 [2021-08-21 18:39:37,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:37,796 INFO L470 AbstractCegarLoop]: Abstraction has 2584 states and 6010 transitions. [2021-08-21 18:39:37,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 15 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:37,796 INFO L276 IsEmpty]: Start isEmpty. Operand 2584 states and 6010 transitions. [2021-08-21 18:39:37,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:37,799 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:37,799 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:39:37,827 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 18:39:38,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:38,000 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:38,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:38,000 INFO L82 PathProgramCache]: Analyzing trace with hash -676222408, now seen corresponding path program 46 times [2021-08-21 18:39:38,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:38,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202097283] [2021-08-21 18:39:38,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:38,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:38,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:39:38,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:38,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202097283] [2021-08-21 18:39:38,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1202097283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:38,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426668393] [2021-08-21 18:39:38,049 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:39:38,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:38,049 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:38,050 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 18:39:38,050 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 18:39:41,788 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:39:41,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:41,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:39:41,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:41,928 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 18:39:41,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426668393] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:41,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:41,928 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 14 [2021-08-21 18:39:41,928 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475776892] [2021-08-21 18:39:41,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:39:41,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:41,929 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:39:41,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:39:41,929 INFO L87 Difference]: Start difference. First operand 2584 states and 6010 transitions. Second operand has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:42,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:42,225 INFO L93 Difference]: Finished difference Result 2909 states and 6454 transitions. [2021-08-21 18:39:42,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:39:42,225 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:39:42,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:42,228 INFO L225 Difference]: With dead ends: 2909 [2021-08-21 18:39:42,228 INFO L226 Difference]: Without dead ends: 2903 [2021-08-21 18:39:42,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 200.2ms TimeCoverageRelationStatistics Valid=222, Invalid=708, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:39:42,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2903 states. [2021-08-21 18:39:42,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2903 to 2560. [2021-08-21 18:39:42,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2560 states, 2559 states have (on average 2.3255177803829623) internal successors, (5951), 2559 states have internal predecessors, (5951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:42,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 5951 transitions. [2021-08-21 18:39:42,256 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 5951 transitions. Word has length 28 [2021-08-21 18:39:42,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:42,256 INFO L470 AbstractCegarLoop]: Abstraction has 2560 states and 5951 transitions. [2021-08-21 18:39:42,256 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:42,256 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 5951 transitions. [2021-08-21 18:39:42,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:42,259 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:42,259 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:39:42,286 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 18:39:42,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-08-21 18:39:42,460 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:42,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:42,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1292601912, now seen corresponding path program 47 times [2021-08-21 18:39:42,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:42,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227949829] [2021-08-21 18:39:42,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:42,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:42,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:42,541 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 18:39:42,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:42,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227949829] [2021-08-21 18:39:42,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227949829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:42,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511312783] [2021-08-21 18:39:42,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:39:42,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:42,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:42,542 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 18:39:42,543 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 18:39:46,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:39:46,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:46,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:39:46,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:46,390 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 18:39:46,390 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511312783] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:46,390 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:46,390 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-21 18:39:46,390 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92418658] [2021-08-21 18:39:46,390 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:39:46,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:46,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:39:46,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:39:46,391 INFO L87 Difference]: Start difference. First operand 2560 states and 5951 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:46,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:46,694 INFO L93 Difference]: Finished difference Result 3007 states and 6677 transitions. [2021-08-21 18:39:46,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:39:46,695 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:39:46,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:46,698 INFO L225 Difference]: With dead ends: 3007 [2021-08-21 18:39:46,698 INFO L226 Difference]: Without dead ends: 3003 [2021-08-21 18:39:46,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 233.9ms TimeCoverageRelationStatistics Valid=242, Invalid=750, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:39:46,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3003 states. [2021-08-21 18:39:46,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3003 to 2560. [2021-08-21 18:39:46,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2560 states, 2559 states have (on average 2.324736225087925) internal successors, (5949), 2559 states have internal predecessors, (5949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:46,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2560 states to 2560 states and 5949 transitions. [2021-08-21 18:39:46,736 INFO L78 Accepts]: Start accepts. Automaton has 2560 states and 5949 transitions. Word has length 28 [2021-08-21 18:39:46,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:46,736 INFO L470 AbstractCegarLoop]: Abstraction has 2560 states and 5949 transitions. [2021-08-21 18:39:46,736 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:46,736 INFO L276 IsEmpty]: Start isEmpty. Operand 2560 states and 5949 transitions. [2021-08-21 18:39:46,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:46,739 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:46,739 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:39:46,766 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 18:39:46,939 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:46,939 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:46,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:46,939 INFO L82 PathProgramCache]: Analyzing trace with hash -279782856, now seen corresponding path program 48 times [2021-08-21 18:39:46,940 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:46,940 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603138123] [2021-08-21 18:39:46,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:46,940 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:46,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:46,991 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 18:39:46,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:46,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603138123] [2021-08-21 18:39:46,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603138123] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:46,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948677370] [2021-08-21 18:39:46,992 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:39:46,992 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:46,992 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:46,992 INFO L229 MonitoredProcess]: Starting monitored process 75 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:46,993 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-08-21 18:39:50,757 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:39:50,757 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:50,757 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:39:50,758 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:50,890 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 18:39:50,891 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948677370] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:50,891 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:50,891 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 13 [2021-08-21 18:39:50,891 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238749614] [2021-08-21 18:39:50,891 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:39:50,891 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:50,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:39:50,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:39:50,892 INFO L87 Difference]: Start difference. First operand 2560 states and 5949 transitions. Second operand has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:51,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:51,354 INFO L93 Difference]: Finished difference Result 3106 states and 6937 transitions. [2021-08-21 18:39:51,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 18:39:51,354 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:39:51,354 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:51,358 INFO L225 Difference]: With dead ends: 3106 [2021-08-21 18:39:51,358 INFO L226 Difference]: Without dead ends: 3106 [2021-08-21 18:39:51,358 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 333.3ms TimeCoverageRelationStatistics Valid=455, Invalid=1351, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:39:51,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3106 states. [2021-08-21 18:39:51,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3106 to 2532. [2021-08-21 18:39:51,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2532 states, 2531 states have (on average 2.3303042275780324) internal successors, (5898), 2531 states have internal predecessors, (5898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:51,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2532 states to 2532 states and 5898 transitions. [2021-08-21 18:39:51,387 INFO L78 Accepts]: Start accepts. Automaton has 2532 states and 5898 transitions. Word has length 28 [2021-08-21 18:39:51,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:51,387 INFO L470 AbstractCegarLoop]: Abstraction has 2532 states and 5898 transitions. [2021-08-21 18:39:51,387 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.076923076923077) internal successors, (40), 13 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:51,387 INFO L276 IsEmpty]: Start isEmpty. Operand 2532 states and 5898 transitions. [2021-08-21 18:39:51,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:51,390 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:51,390 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:39:51,420 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:51,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:51,597 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:51,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:51,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1013904380, now seen corresponding path program 49 times [2021-08-21 18:39:51,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:51,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041496533] [2021-08-21 18:39:51,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:51,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:51,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:51,650 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 18:39:51,651 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:51,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041496533] [2021-08-21 18:39:51,651 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041496533] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:51,651 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529214916] [2021-08-21 18:39:51,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:39:51,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:51,651 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:51,653 INFO L229 MonitoredProcess]: Starting monitored process 76 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:51,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-08-21 18:39:55,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:55,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:39:55,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:55,585 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 18:39:55,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529214916] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:55,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:55,586 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:39:55,586 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164606863] [2021-08-21 18:39:55,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:39:55,586 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:55,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:39:55,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:39:55,586 INFO L87 Difference]: Start difference. First operand 2532 states and 5898 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:55,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:55,915 INFO L93 Difference]: Finished difference Result 3238 states and 7203 transitions. [2021-08-21 18:39:55,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:39:55,916 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:39:55,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:55,919 INFO L225 Difference]: With dead ends: 3238 [2021-08-21 18:39:55,920 INFO L226 Difference]: Without dead ends: 3234 [2021-08-21 18:39:55,920 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 207.5ms TimeCoverageRelationStatistics Valid=270, Invalid=786, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:39:55,922 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3234 states. [2021-08-21 18:39:55,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3234 to 2685. [2021-08-21 18:39:55,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2685 states, 2684 states have (on average 2.3412816691505216) internal successors, (6284), 2684 states have internal predecessors, (6284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:55,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2685 states to 2685 states and 6284 transitions. [2021-08-21 18:39:55,950 INFO L78 Accepts]: Start accepts. Automaton has 2685 states and 6284 transitions. Word has length 28 [2021-08-21 18:39:55,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:55,950 INFO L470 AbstractCegarLoop]: Abstraction has 2685 states and 6284 transitions. [2021-08-21 18:39:55,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:55,950 INFO L276 IsEmpty]: Start isEmpty. Operand 2685 states and 6284 transitions. [2021-08-21 18:39:55,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:39:55,953 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:55,953 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:39:55,980 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:56,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-08-21 18:39:56,153 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:56,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:56,154 INFO L82 PathProgramCache]: Analyzing trace with hash -558480388, now seen corresponding path program 50 times [2021-08-21 18:39:56,154 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:56,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641841236] [2021-08-21 18:39:56,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:56,154 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:56,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:56,234 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 18:39:56,235 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:56,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641841236] [2021-08-21 18:39:56,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641841236] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:56,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412513531] [2021-08-21 18:39:56,235 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:39:56,235 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:56,235 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:56,236 INFO L229 MonitoredProcess]: Starting monitored process 77 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:39:56,241 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-08-21 18:40:00,036 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:40:00,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:00,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:40:00,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:00,160 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 18:40:00,160 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412513531] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:00,160 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:00,160 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:40:00,160 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [860337155] [2021-08-21 18:40:00,160 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:40:00,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:00,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:40:00,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:40:00,165 INFO L87 Difference]: Start difference. First operand 2685 states and 6284 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:00,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:00,634 INFO L93 Difference]: Finished difference Result 2981 states and 6708 transitions. [2021-08-21 18:40:00,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:40:00,634 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:40:00,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:00,637 INFO L225 Difference]: With dead ends: 2981 [2021-08-21 18:40:00,637 INFO L226 Difference]: Without dead ends: 2981 [2021-08-21 18:40:00,638 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 516 ImplicationChecksByTransitivity, 329.7ms TimeCoverageRelationStatistics Valid=467, Invalid=1255, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:40:00,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2981 states. [2021-08-21 18:40:00,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2981 to 2668. [2021-08-21 18:40:00,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2668 states, 2667 states have (on average 2.341207349081365) internal successors, (6244), 2667 states have internal predecessors, (6244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:00,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2668 states to 2668 states and 6244 transitions. [2021-08-21 18:40:00,665 INFO L78 Accepts]: Start accepts. Automaton has 2668 states and 6244 transitions. Word has length 28 [2021-08-21 18:40:00,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:00,665 INFO L470 AbstractCegarLoop]: Abstraction has 2668 states and 6244 transitions. [2021-08-21 18:40:00,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:00,665 INFO L276 IsEmpty]: Start isEmpty. Operand 2668 states and 6244 transitions. [2021-08-21 18:40:00,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:00,668 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:00,668 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:00,696 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-08-21 18:40:00,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-21 18:40:00,870 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:00,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:00,870 INFO L82 PathProgramCache]: Analyzing trace with hash -916332608, now seen corresponding path program 51 times [2021-08-21 18:40:00,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:00,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606287269] [2021-08-21 18:40:00,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:00,870 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:00,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:00,937 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 18:40:00,938 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:00,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606287269] [2021-08-21 18:40:00,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1606287269] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:00,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [531914502] [2021-08-21 18:40:00,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:40:00,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:00,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:00,939 INFO L229 MonitoredProcess]: Starting monitored process 78 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:00,939 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-08-21 18:40:04,782 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:40:04,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:04,783 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:40:04,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:04,905 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 18:40:04,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [531914502] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:04,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:04,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 13 [2021-08-21 18:40:04,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659037572] [2021-08-21 18:40:04,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:40:04,905 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:04,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:40:04,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:40:04,906 INFO L87 Difference]: Start difference. First operand 2668 states and 6244 transitions. Second operand has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:05,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:05,428 INFO L93 Difference]: Finished difference Result 3527 states and 7947 transitions. [2021-08-21 18:40:05,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:40:05,429 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:40:05,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:05,433 INFO L225 Difference]: With dead ends: 3527 [2021-08-21 18:40:05,433 INFO L226 Difference]: Without dead ends: 3527 [2021-08-21 18:40:05,434 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 23 SyntacticMatches, 2 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 361.3ms TimeCoverageRelationStatistics Valid=470, Invalid=1170, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:40:05,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3527 states. [2021-08-21 18:40:05,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3527 to 2786. [2021-08-21 18:40:05,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2786 states, 2785 states have (on average 2.3368043087971273) internal successors, (6508), 2785 states have internal predecessors, (6508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:05,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2786 states to 2786 states and 6508 transitions. [2021-08-21 18:40:05,471 INFO L78 Accepts]: Start accepts. Automaton has 2786 states and 6508 transitions. Word has length 28 [2021-08-21 18:40:05,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:05,471 INFO L470 AbstractCegarLoop]: Abstraction has 2786 states and 6508 transitions. [2021-08-21 18:40:05,471 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.0) internal successors, (39), 13 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:05,471 INFO L276 IsEmpty]: Start isEmpty. Operand 2786 states and 6508 transitions. [2021-08-21 18:40:05,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:05,475 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:05,475 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:05,503 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-08-21 18:40:05,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:05,697 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:05,697 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:05,697 INFO L82 PathProgramCache]: Analyzing trace with hash 449185148, now seen corresponding path program 27 times [2021-08-21 18:40:05,697 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:05,697 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146631744] [2021-08-21 18:40:05,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:05,697 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:05,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:05,760 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:05,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:05,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146631744] [2021-08-21 18:40:05,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146631744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:05,761 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [623588731] [2021-08-21 18:40:05,761 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:40:05,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:05,761 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:05,761 INFO L229 MonitoredProcess]: Starting monitored process 79 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:05,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-08-21 18:40:09,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-08-21 18:40:09,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:09,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:40:09,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:09,910 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 1 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:09,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [623588731] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:09,910 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:09,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-21 18:40:09,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213754188] [2021-08-21 18:40:09,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:40:09,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:09,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:40:09,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=181, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:40:09,911 INFO L87 Difference]: Start difference. First operand 2786 states and 6508 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:10,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:10,830 INFO L93 Difference]: Finished difference Result 9641 states and 19955 transitions. [2021-08-21 18:40:10,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-08-21 18:40:10,831 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:40:10,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:10,843 INFO L225 Difference]: With dead ends: 9641 [2021-08-21 18:40:10,843 INFO L226 Difference]: Without dead ends: 9641 [2021-08-21 18:40:10,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1984 ImplicationChecksByTransitivity, 696.6ms TimeCoverageRelationStatistics Valid=1259, Invalid=4291, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 18:40:10,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9641 states. [2021-08-21 18:40:10,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9641 to 3891. [2021-08-21 18:40:10,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3891 states, 3890 states have (on average 2.3768637532133674) internal successors, (9246), 3890 states have internal predecessors, (9246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:10,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3891 states to 3891 states and 9246 transitions. [2021-08-21 18:40:10,948 INFO L78 Accepts]: Start accepts. Automaton has 3891 states and 9246 transitions. Word has length 28 [2021-08-21 18:40:10,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:10,948 INFO L470 AbstractCegarLoop]: Abstraction has 3891 states and 9246 transitions. [2021-08-21 18:40:10,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:10,949 INFO L276 IsEmpty]: Start isEmpty. Operand 3891 states and 9246 transitions. [2021-08-21 18:40:10,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:10,953 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:10,953 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:10,983 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-08-21 18:40:11,164 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:11,164 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:11,165 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:11,165 INFO L82 PathProgramCache]: Analyzing trace with hash 1972617152, now seen corresponding path program 52 times [2021-08-21 18:40:11,165 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:11,165 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [506930116] [2021-08-21 18:40:11,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:11,165 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:11,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:11,218 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:11,218 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:11,218 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [506930116] [2021-08-21 18:40:11,218 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [506930116] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:11,219 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894105478] [2021-08-21 18:40:11,219 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:40:11,219 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:11,219 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:11,219 INFO L229 MonitoredProcess]: Starting monitored process 80 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:11,220 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-08-21 18:40:15,050 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:40:15,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:15,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:40:15,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:15,185 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:15,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894105478] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:15,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:15,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 14 [2021-08-21 18:40:15,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566891980] [2021-08-21 18:40:15,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:40:15,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:15,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:40:15,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:40:15,186 INFO L87 Difference]: Start difference. First operand 3891 states and 9246 transitions. Second operand has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:15,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:15,782 INFO L93 Difference]: Finished difference Result 4845 states and 11159 transitions. [2021-08-21 18:40:15,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 18:40:15,783 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:40:15,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:15,788 INFO L225 Difference]: With dead ends: 4845 [2021-08-21 18:40:15,788 INFO L226 Difference]: Without dead ends: 4845 [2021-08-21 18:40:15,789 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 540 ImplicationChecksByTransitivity, 384.2ms TimeCoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:40:15,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4845 states. [2021-08-21 18:40:15,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4845 to 4042. [2021-08-21 18:40:15,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4042 states, 4041 states have (on average 2.3585746102449887) internal successors, (9531), 4041 states have internal predecessors, (9531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:15,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4042 states to 4042 states and 9531 transitions. [2021-08-21 18:40:15,835 INFO L78 Accepts]: Start accepts. Automaton has 4042 states and 9531 transitions. Word has length 28 [2021-08-21 18:40:15,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:15,835 INFO L470 AbstractCegarLoop]: Abstraction has 4042 states and 9531 transitions. [2021-08-21 18:40:15,835 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.9285714285714284) internal successors, (41), 14 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:15,835 INFO L276 IsEmpty]: Start isEmpty. Operand 4042 states and 9531 transitions. [2021-08-21 18:40:15,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:15,839 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:15,839 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:15,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Ended with exit code 0 [2021-08-21 18:40:16,054 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable81 [2021-08-21 18:40:16,054 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:16,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:16,054 INFO L82 PathProgramCache]: Analyzing trace with hash -1586685124, now seen corresponding path program 53 times [2021-08-21 18:40:16,054 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:16,054 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342818493] [2021-08-21 18:40:16,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:16,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:16,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:16,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:16,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342818493] [2021-08-21 18:40:16,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342818493] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:16,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634687694] [2021-08-21 18:40:16,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:40:16,115 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:16,115 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:16,115 INFO L229 MonitoredProcess]: Starting monitored process 81 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:16,117 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-08-21 18:40:19,973 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:40:19,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:19,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:40:19,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:20,120 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:40:20,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [634687694] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:20,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:20,120 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 15 [2021-08-21 18:40:20,120 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [149651849] [2021-08-21 18:40:20,120 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:40:20,120 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:20,120 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:40:20,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:40:20,121 INFO L87 Difference]: Start difference. First operand 4042 states and 9531 transitions. Second operand has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:20,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:20,507 INFO L93 Difference]: Finished difference Result 7202 states and 15425 transitions. [2021-08-21 18:40:20,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:40:20,508 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:40:20,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:20,516 INFO L225 Difference]: With dead ends: 7202 [2021-08-21 18:40:20,516 INFO L226 Difference]: Without dead ends: 7202 [2021-08-21 18:40:20,517 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 476 ImplicationChecksByTransitivity, 271.2ms TimeCoverageRelationStatistics Valid=390, Invalid=1250, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:40:20,522 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7202 states. [2021-08-21 18:40:20,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7202 to 4321. [2021-08-21 18:40:20,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4321 states, 4320 states have (on average 2.36875) internal successors, (10233), 4320 states have internal predecessors, (10233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:20,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4321 states to 4321 states and 10233 transitions. [2021-08-21 18:40:20,586 INFO L78 Accepts]: Start accepts. Automaton has 4321 states and 10233 transitions. Word has length 28 [2021-08-21 18:40:20,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:20,586 INFO L470 AbstractCegarLoop]: Abstraction has 4321 states and 10233 transitions. [2021-08-21 18:40:20,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.8666666666666667) internal successors, (43), 15 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:20,586 INFO L276 IsEmpty]: Start isEmpty. Operand 4321 states and 10233 transitions. [2021-08-21 18:40:20,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:20,591 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:20,591 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:20,621 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-08-21 18:40:20,804 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:20,805 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:20,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:20,805 INFO L82 PathProgramCache]: Analyzing trace with hash 1216787260, now seen corresponding path program 54 times [2021-08-21 18:40:20,805 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:20,805 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293307078] [2021-08-21 18:40:20,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:20,805 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:20,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:20,866 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:20,866 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:20,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293307078] [2021-08-21 18:40:20,866 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293307078] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:20,866 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332283574] [2021-08-21 18:40:20,866 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:40:20,866 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:20,866 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:20,867 INFO L229 MonitoredProcess]: Starting monitored process 82 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:20,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-08-21 18:40:24,751 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:40:24,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:24,752 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:40:24,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:24,916 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:40:24,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332283574] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:24,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:24,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 16 [2021-08-21 18:40:24,916 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [47058980] [2021-08-21 18:40:24,916 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:40:24,916 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:24,916 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:40:24,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=185, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:40:24,917 INFO L87 Difference]: Start difference. First operand 4321 states and 10233 transitions. Second operand has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:25,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:25,552 INFO L93 Difference]: Finished difference Result 7612 states and 16168 transitions. [2021-08-21 18:40:25,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 18:40:25,552 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:40:25,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:25,561 INFO L225 Difference]: With dead ends: 7612 [2021-08-21 18:40:25,561 INFO L226 Difference]: Without dead ends: 7612 [2021-08-21 18:40:25,562 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1188 ImplicationChecksByTransitivity, 462.1ms TimeCoverageRelationStatistics Valid=750, Invalid=2672, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:40:25,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7612 states. [2021-08-21 18:40:25,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7612 to 4218. [2021-08-21 18:40:25,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4218 states, 4217 states have (on average 2.351908940004743) internal successors, (9918), 4217 states have internal predecessors, (9918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:25,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4218 states to 4218 states and 9918 transitions. [2021-08-21 18:40:25,627 INFO L78 Accepts]: Start accepts. Automaton has 4218 states and 9918 transitions. Word has length 28 [2021-08-21 18:40:25,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:25,627 INFO L470 AbstractCegarLoop]: Abstraction has 4218 states and 9918 transitions. [2021-08-21 18:40:25,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.8125) internal successors, (45), 16 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:25,627 INFO L276 IsEmpty]: Start isEmpty. Operand 4218 states and 9918 transitions. [2021-08-21 18:40:25,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:25,631 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:25,631 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:25,659 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-08-21 18:40:25,831 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:25,831 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:25,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:25,832 INFO L82 PathProgramCache]: Analyzing trace with hash -893490760, now seen corresponding path program 55 times [2021-08-21 18:40:25,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:25,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43182720] [2021-08-21 18:40:25,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:25,832 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:25,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:25,881 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:40:25,881 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:25,881 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43182720] [2021-08-21 18:40:25,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43182720] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:25,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176868492] [2021-08-21 18:40:25,882 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:40:25,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:25,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:25,882 INFO L229 MonitoredProcess]: Starting monitored process 83 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:25,883 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-08-21 18:40:29,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:29,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:40:29,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:29,839 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:40:29,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176868492] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:29,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:29,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-21 18:40:29,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489962722] [2021-08-21 18:40:29,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:40:29,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:29,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:40:29,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:40:29,840 INFO L87 Difference]: Start difference. First operand 4218 states and 9918 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:29,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:29,926 INFO L93 Difference]: Finished difference Result 5498 states and 12592 transitions. [2021-08-21 18:40:29,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:40:29,926 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:40:29,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:29,932 INFO L225 Difference]: With dead ends: 5498 [2021-08-21 18:40:29,932 INFO L226 Difference]: Without dead ends: 5496 [2021-08-21 18:40:29,932 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 58.8ms TimeCoverageRelationStatistics Valid=60, Invalid=122, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:40:29,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5496 states. [2021-08-21 18:40:29,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5496 to 4320. [2021-08-21 18:40:29,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4320 states, 4319 states have (on average 2.3544802037508683) internal successors, (10169), 4319 states have internal predecessors, (10169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:29,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4320 states to 4320 states and 10169 transitions. [2021-08-21 18:40:29,985 INFO L78 Accepts]: Start accepts. Automaton has 4320 states and 10169 transitions. Word has length 28 [2021-08-21 18:40:29,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:29,985 INFO L470 AbstractCegarLoop]: Abstraction has 4320 states and 10169 transitions. [2021-08-21 18:40:29,985 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:29,985 INFO L276 IsEmpty]: Start isEmpty. Operand 4320 states and 10169 transitions. [2021-08-21 18:40:29,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:29,989 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:29,989 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:30,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-08-21 18:40:30,189 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-08-21 18:40:30,190 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:30,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:30,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1551728952, now seen corresponding path program 56 times [2021-08-21 18:40:30,190 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:30,190 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438682087] [2021-08-21 18:40:30,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:30,190 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:30,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:30,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:30,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438682087] [2021-08-21 18:40:30,279 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [438682087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:30,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158174580] [2021-08-21 18:40:30,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:40:30,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:30,279 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:30,280 INFO L229 MonitoredProcess]: Starting monitored process 84 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:30,280 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-08-21 18:40:34,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:40:34,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:34,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:40:34,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:34,220 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:34,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158174580] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:34,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:34,220 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-08-21 18:40:34,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581524860] [2021-08-21 18:40:34,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:40:34,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:34,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:40:34,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=97, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:40:34,221 INFO L87 Difference]: Start difference. First operand 4320 states and 10169 transitions. Second operand has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:34,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:34,371 INFO L93 Difference]: Finished difference Result 6117 states and 13967 transitions. [2021-08-21 18:40:34,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:40:34,371 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:40:34,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:34,378 INFO L225 Difference]: With dead ends: 6117 [2021-08-21 18:40:34,378 INFO L226 Difference]: Without dead ends: 6105 [2021-08-21 18:40:34,379 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 76.8ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:40:34,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6105 states. [2021-08-21 18:40:34,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6105 to 5661. [2021-08-21 18:40:34,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5661 states, 5660 states have (on average 2.3358657243816254) internal successors, (13221), 5660 states have internal predecessors, (13221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:34,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5661 states to 5661 states and 13221 transitions. [2021-08-21 18:40:34,448 INFO L78 Accepts]: Start accepts. Automaton has 5661 states and 13221 transitions. Word has length 28 [2021-08-21 18:40:34,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:34,449 INFO L470 AbstractCegarLoop]: Abstraction has 5661 states and 13221 transitions. [2021-08-21 18:40:34,449 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.9166666666666665) internal successors, (35), 12 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:34,449 INFO L276 IsEmpty]: Start isEmpty. Operand 5661 states and 13221 transitions. [2021-08-21 18:40:34,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:34,455 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:34,455 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:34,482 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-08-21 18:40:34,656 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:34,657 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:34,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:34,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1689517640, now seen corresponding path program 57 times [2021-08-21 18:40:34,657 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:34,657 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854169971] [2021-08-21 18:40:34,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:34,657 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:34,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:34,707 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:40:34,707 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:34,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854169971] [2021-08-21 18:40:34,708 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854169971] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:34,708 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912568767] [2021-08-21 18:40:34,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:40:34,708 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:34,708 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:34,709 INFO L229 MonitoredProcess]: Starting monitored process 85 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:34,709 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-08-21 18:40:38,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:40:38,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:38,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:40:38,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:38,733 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-08-21 18:40:38,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912568767] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:38,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:38,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 11 [2021-08-21 18:40:38,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447821778] [2021-08-21 18:40:38,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:40:38,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:38,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:40:38,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=71, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:40:38,734 INFO L87 Difference]: Start difference. First operand 5661 states and 13221 transitions. Second operand has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:38,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:38,835 INFO L93 Difference]: Finished difference Result 6729 states and 15370 transitions. [2021-08-21 18:40:38,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:40:38,836 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:40:38,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:38,843 INFO L225 Difference]: With dead ends: 6729 [2021-08-21 18:40:38,844 INFO L226 Difference]: Without dead ends: 6729 [2021-08-21 18:40:38,844 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 75.1ms TimeCoverageRelationStatistics Valid=85, Invalid=155, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:40:38,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6729 states. [2021-08-21 18:40:38,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6729 to 5469. [2021-08-21 18:40:38,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5469 states, 5468 states have (on average 2.3222384784198975) internal successors, (12698), 5468 states have internal predecessors, (12698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:38,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5469 states to 5469 states and 12698 transitions. [2021-08-21 18:40:38,915 INFO L78 Accepts]: Start accepts. Automaton has 5469 states and 12698 transitions. Word has length 28 [2021-08-21 18:40:38,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:38,915 INFO L470 AbstractCegarLoop]: Abstraction has 5469 states and 12698 transitions. [2021-08-21 18:40:38,915 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.5454545454545454) internal successors, (39), 11 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:38,915 INFO L276 IsEmpty]: Start isEmpty. Operand 5469 states and 12698 transitions. [2021-08-21 18:40:38,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:38,921 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:38,921 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:38,949 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-08-21 18:40:39,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:39,137 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:39,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:39,137 INFO L82 PathProgramCache]: Analyzing trace with hash 746070328, now seen corresponding path program 58 times [2021-08-21 18:40:39,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:39,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611776826] [2021-08-21 18:40:39,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:39,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:39,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:39,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:39,195 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:39,195 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611776826] [2021-08-21 18:40:39,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611776826] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:39,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329607103] [2021-08-21 18:40:39,196 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:40:39,196 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:39,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:39,197 INFO L229 MonitoredProcess]: Starting monitored process 86 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:39,200 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-08-21 18:40:43,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:40:43,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:43,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:40:43,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:43,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:43,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329607103] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:43,186 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:43,186 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-21 18:40:43,186 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1511491678] [2021-08-21 18:40:43,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:40:43,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:43,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:40:43,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:40:43,187 INFO L87 Difference]: Start difference. First operand 5469 states and 12698 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:43,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:43,330 INFO L93 Difference]: Finished difference Result 5656 states and 12895 transitions. [2021-08-21 18:40:43,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:40:43,331 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:40:43,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:43,337 INFO L225 Difference]: With dead ends: 5656 [2021-08-21 18:40:43,337 INFO L226 Difference]: Without dead ends: 5656 [2021-08-21 18:40:43,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=105, Invalid=237, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:40:43,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5656 states. [2021-08-21 18:40:43,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5656 to 5279. [2021-08-21 18:40:43,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5279 states, 5278 states have (on average 2.3137552103069345) internal successors, (12212), 5278 states have internal predecessors, (12212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:43,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5279 states to 5279 states and 12212 transitions. [2021-08-21 18:40:43,398 INFO L78 Accepts]: Start accepts. Automaton has 5279 states and 12212 transitions. Word has length 28 [2021-08-21 18:40:43,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:43,398 INFO L470 AbstractCegarLoop]: Abstraction has 5279 states and 12212 transitions. [2021-08-21 18:40:43,398 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:43,398 INFO L276 IsEmpty]: Start isEmpty. Operand 5279 states and 12212 transitions. [2021-08-21 18:40:43,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:43,403 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:43,403 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:43,430 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-08-21 18:40:43,605 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-08-21 18:40:43,605 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:43,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:43,605 INFO L82 PathProgramCache]: Analyzing trace with hash -1943270792, now seen corresponding path program 59 times [2021-08-21 18:40:43,605 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:43,605 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708870906] [2021-08-21 18:40:43,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:43,606 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:43,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:43,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:40:43,689 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:43,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708870906] [2021-08-21 18:40:43,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708870906] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:43,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [225122218] [2021-08-21 18:40:43,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:40:43,689 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:43,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:43,690 INFO L229 MonitoredProcess]: Starting monitored process 87 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:43,690 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-08-21 18:40:47,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:40:47,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:47,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:40:47,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:47,691 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-08-21 18:40:47,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [225122218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:47,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:47,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7] total 10 [2021-08-21 18:40:47,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251978773] [2021-08-21 18:40:47,692 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:40:47,692 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:47,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:40:47,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=62, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:40:47,692 INFO L87 Difference]: Start difference. First operand 5279 states and 12212 transitions. Second operand has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:47,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:47,787 INFO L93 Difference]: Finished difference Result 5487 states and 12643 transitions. [2021-08-21 18:40:47,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:40:47,787 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:40:47,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:47,793 INFO L225 Difference]: With dead ends: 5487 [2021-08-21 18:40:47,793 INFO L226 Difference]: Without dead ends: 5487 [2021-08-21 18:40:47,794 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 108.2ms TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:40:47,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5487 states. [2021-08-21 18:40:47,839 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5487 to 5252. [2021-08-21 18:40:47,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5252 states, 5251 states have (on average 2.312702342410969) internal successors, (12144), 5251 states have internal predecessors, (12144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:47,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5252 states to 5252 states and 12144 transitions. [2021-08-21 18:40:47,850 INFO L78 Accepts]: Start accepts. Automaton has 5252 states and 12144 transitions. Word has length 28 [2021-08-21 18:40:47,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:47,850 INFO L470 AbstractCegarLoop]: Abstraction has 5252 states and 12144 transitions. [2021-08-21 18:40:47,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.7) internal successors, (37), 10 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:47,851 INFO L276 IsEmpty]: Start isEmpty. Operand 5252 states and 12144 transitions. [2021-08-21 18:40:47,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:47,856 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:47,856 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:47,887 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-08-21 18:40:48,068 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:48,069 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:48,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:48,069 INFO L82 PathProgramCache]: Analyzing trace with hash -668128392, now seen corresponding path program 60 times [2021-08-21 18:40:48,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:48,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580674629] [2021-08-21 18:40:48,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:48,069 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:48,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:48,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:40:48,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:48,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580674629] [2021-08-21 18:40:48,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580674629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:48,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515236862] [2021-08-21 18:40:48,116 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:40:48,117 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:48,117 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:48,117 INFO L229 MonitoredProcess]: Starting monitored process 88 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:48,152 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-08-21 18:40:52,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:40:52,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:52,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 7 conjunts are in the unsatisfiable core [2021-08-21 18:40:52,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:52,173 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:40:52,173 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515236862] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:52,173 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:52,173 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2021-08-21 18:40:52,173 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018481075] [2021-08-21 18:40:52,173 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-08-21 18:40:52,173 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:52,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-08-21 18:40:52,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:40:52,174 INFO L87 Difference]: Start difference. First operand 5252 states and 12144 transitions. Second operand has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:52,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:52,292 INFO L93 Difference]: Finished difference Result 5791 states and 13270 transitions. [2021-08-21 18:40:52,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:40:52,293 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:40:52,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:52,299 INFO L225 Difference]: With dead ends: 5791 [2021-08-21 18:40:52,299 INFO L226 Difference]: Without dead ends: 5791 [2021-08-21 18:40:52,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 80.1ms TimeCoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:40:52,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5791 states. [2021-08-21 18:40:52,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5791 to 5478. [2021-08-21 18:40:52,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5478 states, 5477 states have (on average 2.3041811210516707) internal successors, (12620), 5477 states have internal predecessors, (12620), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:52,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5478 states to 5478 states and 12620 transitions. [2021-08-21 18:40:52,368 INFO L78 Accepts]: Start accepts. Automaton has 5478 states and 12620 transitions. Word has length 28 [2021-08-21 18:40:52,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:52,368 INFO L470 AbstractCegarLoop]: Abstraction has 5478 states and 12620 transitions. [2021-08-21 18:40:52,368 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 3.6) internal successors, (36), 10 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:52,369 INFO L276 IsEmpty]: Start isEmpty. Operand 5478 states and 12620 transitions. [2021-08-21 18:40:52,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:52,374 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:52,374 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:52,401 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-08-21 18:40:52,574 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:52,575 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:52,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:52,575 INFO L82 PathProgramCache]: Analyzing trace with hash 859737336, now seen corresponding path program 61 times [2021-08-21 18:40:52,575 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:52,575 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004763344] [2021-08-21 18:40:52,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:52,575 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:52,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:52,634 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:52,634 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:52,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004763344] [2021-08-21 18:40:52,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004763344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:52,634 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [423828885] [2021-08-21 18:40:52,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:40:52,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:52,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:52,637 INFO L229 MonitoredProcess]: Starting monitored process 89 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:52,653 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-08-21 18:40:56,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:56,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 9 conjunts are in the unsatisfiable core [2021-08-21 18:40:56,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:56,793 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:56,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [423828885] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:56,793 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:56,793 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-08-21 18:40:56,793 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240504302] [2021-08-21 18:40:56,793 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:40:56,793 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:56,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:40:56,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=176, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:40:56,794 INFO L87 Difference]: Start difference. First operand 5478 states and 12620 transitions. Second operand has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:57,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:57,333 INFO L93 Difference]: Finished difference Result 13396 states and 28206 transitions. [2021-08-21 18:40:57,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 18:40:57,333 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:40:57,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:57,352 INFO L225 Difference]: With dead ends: 13396 [2021-08-21 18:40:57,352 INFO L226 Difference]: Without dead ends: 13396 [2021-08-21 18:40:57,352 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 379.2ms TimeCoverageRelationStatistics Valid=638, Invalid=1912, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:40:57,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13396 states. [2021-08-21 18:40:57,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13396 to 7542. [2021-08-21 18:40:57,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7542 states, 7541 states have (on average 2.3259514653229014) internal successors, (17540), 7541 states have internal predecessors, (17540), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:57,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7542 states to 7542 states and 17540 transitions. [2021-08-21 18:40:57,483 INFO L78 Accepts]: Start accepts. Automaton has 7542 states and 17540 transitions. Word has length 28 [2021-08-21 18:40:57,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:57,483 INFO L470 AbstractCegarLoop]: Abstraction has 7542 states and 17540 transitions. [2021-08-21 18:40:57,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.875) internal successors, (46), 16 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:57,483 INFO L276 IsEmpty]: Start isEmpty. Operand 7542 states and 17540 transitions. [2021-08-21 18:40:57,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:40:57,491 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:57,491 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:40:57,521 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-08-21 18:40:57,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:57,709 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:57,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:57,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1117559800, now seen corresponding path program 62 times [2021-08-21 18:40:57,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:57,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029048319] [2021-08-21 18:40:57,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:57,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:57,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:57,803 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 18:40:57,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:57,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029048319] [2021-08-21 18:40:57,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029048319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:57,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993181133] [2021-08-21 18:40:57,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:40:57,803 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:57,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:57,804 INFO L229 MonitoredProcess]: Starting monitored process 90 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:40:57,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-08-21 18:41:01,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:41:01,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:01,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:41:01,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:01,839 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 18:41:01,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993181133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:01,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:01,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-21 18:41:01,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613866967] [2021-08-21 18:41:01,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:41:01,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:01,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:41:01,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:41:01,840 INFO L87 Difference]: Start difference. First operand 7542 states and 17540 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:02,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:02,002 INFO L93 Difference]: Finished difference Result 9043 states and 20764 transitions. [2021-08-21 18:41:02,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:41:02,003 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:41:02,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:02,014 INFO L225 Difference]: With dead ends: 9043 [2021-08-21 18:41:02,014 INFO L226 Difference]: Without dead ends: 9039 [2021-08-21 18:41:02,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 72.6ms TimeCoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:41:02,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9039 states. [2021-08-21 18:41:02,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9039 to 8907. [2021-08-21 18:41:02,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8907 states, 8906 states have (on average 2.3155176285650123) internal successors, (20622), 8906 states have internal predecessors, (20622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:02,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8907 states to 8907 states and 20622 transitions. [2021-08-21 18:41:02,133 INFO L78 Accepts]: Start accepts. Automaton has 8907 states and 20622 transitions. Word has length 28 [2021-08-21 18:41:02,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:02,133 INFO L470 AbstractCegarLoop]: Abstraction has 8907 states and 20622 transitions. [2021-08-21 18:41:02,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:02,133 INFO L276 IsEmpty]: Start isEmpty. Operand 8907 states and 20622 transitions. [2021-08-21 18:41:02,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:41:02,142 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:02,142 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:41:02,169 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Ended with exit code 0 [2021-08-21 18:41:02,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2021-08-21 18:41:02,343 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:02,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:02,343 INFO L82 PathProgramCache]: Analyzing trace with hash -454824968, now seen corresponding path program 63 times [2021-08-21 18:41:02,343 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:02,343 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1150915762] [2021-08-21 18:41:02,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:02,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:02,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:02,409 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 18:41:02,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:02,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1150915762] [2021-08-21 18:41:02,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1150915762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:02,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007960121] [2021-08-21 18:41:02,409 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:41:02,409 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:02,409 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:02,410 INFO L229 MonitoredProcess]: Starting monitored process 91 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:02,413 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-08-21 18:41:06,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:41:06,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:06,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:41:06,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:06,504 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 18:41:06,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007960121] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:06,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:06,504 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-21 18:41:06,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528047099] [2021-08-21 18:41:06,505 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:41:06,505 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:06,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:41:06,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:41:06,505 INFO L87 Difference]: Start difference. First operand 8907 states and 20622 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:06,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:06,674 INFO L93 Difference]: Finished difference Result 9060 states and 20809 transitions. [2021-08-21 18:41:06,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:41:06,674 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:41:06,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:06,685 INFO L225 Difference]: With dead ends: 9060 [2021-08-21 18:41:06,685 INFO L226 Difference]: Without dead ends: 9060 [2021-08-21 18:41:06,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 107.7ms TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:41:06,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9060 states. [2021-08-21 18:41:06,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9060 to 8844. [2021-08-21 18:41:06,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8844 states, 8843 states have (on average 2.313694447585661) internal successors, (20460), 8843 states have internal predecessors, (20460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:06,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8844 states to 8844 states and 20460 transitions. [2021-08-21 18:41:06,802 INFO L78 Accepts]: Start accepts. Automaton has 8844 states and 20460 transitions. Word has length 28 [2021-08-21 18:41:06,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:06,802 INFO L470 AbstractCegarLoop]: Abstraction has 8844 states and 20460 transitions. [2021-08-21 18:41:06,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:06,802 INFO L276 IsEmpty]: Start isEmpty. Operand 8844 states and 20460 transitions. [2021-08-21 18:41:06,811 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:41:06,811 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:06,811 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:41:06,841 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-08-21 18:41:07,011 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:07,012 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:07,012 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:07,012 INFO L82 PathProgramCache]: Analyzing trace with hash -812677188, now seen corresponding path program 64 times [2021-08-21 18:41:07,012 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:07,012 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847972618] [2021-08-21 18:41:07,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:07,012 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:07,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:07,088 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:41:07,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:07,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847972618] [2021-08-21 18:41:07,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847972618] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:07,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623075167] [2021-08-21 18:41:07,089 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:41:07,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:07,089 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:07,089 INFO L229 MonitoredProcess]: Starting monitored process 92 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:07,090 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-08-21 18:41:11,103 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:41:11,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:11,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:41:11,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:11,195 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-08-21 18:41:11,195 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1623075167] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:11,196 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:11,196 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 8] total 11 [2021-08-21 18:41:11,196 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815154225] [2021-08-21 18:41:11,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:41:11,196 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:11,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:41:11,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:41:11,196 INFO L87 Difference]: Start difference. First operand 8844 states and 20460 transitions. Second operand has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:11,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:11,386 INFO L93 Difference]: Finished difference Result 9076 states and 20918 transitions. [2021-08-21 18:41:11,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:41:11,386 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:41:11,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:11,399 INFO L225 Difference]: With dead ends: 9076 [2021-08-21 18:41:11,399 INFO L226 Difference]: Without dead ends: 9076 [2021-08-21 18:41:11,399 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 126.9ms TimeCoverageRelationStatistics Valid=155, Invalid=351, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:41:11,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9076 states. [2021-08-21 18:41:11,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9076 to 8978. [2021-08-21 18:41:11,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8978 states, 8977 states have (on average 2.3116854182911886) internal successors, (20752), 8977 states have internal predecessors, (20752), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:11,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8978 states to 8978 states and 20752 transitions. [2021-08-21 18:41:11,512 INFO L78 Accepts]: Start accepts. Automaton has 8978 states and 20752 transitions. Word has length 28 [2021-08-21 18:41:11,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:11,512 INFO L470 AbstractCegarLoop]: Abstraction has 8978 states and 20752 transitions. [2021-08-21 18:41:11,512 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:11,512 INFO L276 IsEmpty]: Start isEmpty. Operand 8978 states and 20752 transitions. [2021-08-21 18:41:11,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:41:11,521 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:11,521 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:41:11,548 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-08-21 18:41:11,721 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:11,722 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:11,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:11,722 INFO L82 PathProgramCache]: Analyzing trace with hash -12851524, now seen corresponding path program 65 times [2021-08-21 18:41:11,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:11,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833331134] [2021-08-21 18:41:11,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:11,722 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:11,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:11,787 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:11,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:11,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833331134] [2021-08-21 18:41:11,787 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833331134] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:11,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958529297] [2021-08-21 18:41:11,787 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:41:11,787 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:11,787 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:11,788 INFO L229 MonitoredProcess]: Starting monitored process 93 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:11,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-08-21 18:41:15,820 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:41:15,820 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:15,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:41:15,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:15,912 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:15,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [958529297] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:15,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:15,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 12 [2021-08-21 18:41:15,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412554897] [2021-08-21 18:41:15,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:41:15,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:15,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:41:15,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:41:15,913 INFO L87 Difference]: Start difference. First operand 8978 states and 20752 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:16,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:16,162 INFO L93 Difference]: Finished difference Result 9348 states and 21536 transitions. [2021-08-21 18:41:16,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:41:16,162 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:41:16,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:16,175 INFO L225 Difference]: With dead ends: 9348 [2021-08-21 18:41:16,175 INFO L226 Difference]: Without dead ends: 9348 [2021-08-21 18:41:16,175 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 25 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 162.1ms TimeCoverageRelationStatistics Valid=212, Invalid=490, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:41:16,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9348 states. [2021-08-21 18:41:16,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9348 to 9051. [2021-08-21 18:41:16,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9051 states, 9050 states have (on average 2.3111602209944753) internal successors, (20916), 9050 states have internal predecessors, (20916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:16,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9051 states to 9051 states and 20916 transitions. [2021-08-21 18:41:16,290 INFO L78 Accepts]: Start accepts. Automaton has 9051 states and 20916 transitions. Word has length 28 [2021-08-21 18:41:16,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:16,291 INFO L470 AbstractCegarLoop]: Abstraction has 9051 states and 20916 transitions. [2021-08-21 18:41:16,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 12 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:16,291 INFO L276 IsEmpty]: Start isEmpty. Operand 9051 states and 20916 transitions. [2021-08-21 18:41:16,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:41:16,327 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:16,327 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:41:16,355 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Forceful destruction successful, exit code 0 [2021-08-21 18:41:16,527 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:16,528 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:16,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:16,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1025606664, now seen corresponding path program 66 times [2021-08-21 18:41:16,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:16,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301894357] [2021-08-21 18:41:16,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:16,528 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:16,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:16,598 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 18:41:16,598 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:16,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301894357] [2021-08-21 18:41:16,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301894357] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:16,598 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080444098] [2021-08-21 18:41:16,599 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:41:16,599 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:16,599 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:16,599 INFO L229 MonitoredProcess]: Starting monitored process 94 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:16,600 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-08-21 18:41:20,571 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:41:20,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:20,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:41:20,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:20,676 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 18:41:20,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2080444098] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:20,676 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:20,676 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-21 18:41:20,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682384486] [2021-08-21 18:41:20,677 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:41:20,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:20,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:41:20,677 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:41:20,677 INFO L87 Difference]: Start difference. First operand 9051 states and 20916 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:20,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:20,818 INFO L93 Difference]: Finished difference Result 10110 states and 22996 transitions. [2021-08-21 18:41:20,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:41:20,818 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:41:20,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:20,831 INFO L225 Difference]: With dead ends: 10110 [2021-08-21 18:41:20,831 INFO L226 Difference]: Without dead ends: 10106 [2021-08-21 18:41:20,831 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 87.5ms TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:41:20,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10106 states. [2021-08-21 18:41:20,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10106 to 9896. [2021-08-21 18:41:20,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9896 states, 9895 states have (on average 2.301566447700859) internal successors, (22774), 9895 states have internal predecessors, (22774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:20,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9896 states to 9896 states and 22774 transitions. [2021-08-21 18:41:20,958 INFO L78 Accepts]: Start accepts. Automaton has 9896 states and 22774 transitions. Word has length 28 [2021-08-21 18:41:20,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:20,958 INFO L470 AbstractCegarLoop]: Abstraction has 9896 states and 22774 transitions. [2021-08-21 18:41:20,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:20,958 INFO L276 IsEmpty]: Start isEmpty. Operand 9896 states and 22774 transitions. [2021-08-21 18:41:20,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:41:20,968 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:20,968 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:41:20,995 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-08-21 18:41:21,168 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:21,168 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:21,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:21,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1696975864, now seen corresponding path program 67 times [2021-08-21 18:41:21,169 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:21,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [47984813] [2021-08-21 18:41:21,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:21,169 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:21,236 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 18:41:21,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:21,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [47984813] [2021-08-21 18:41:21,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [47984813] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:21,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998149459] [2021-08-21 18:41:21,236 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:41:21,236 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:21,236 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:21,237 INFO L229 MonitoredProcess]: Starting monitored process 95 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:21,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-08-21 18:41:25,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:25,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:41:25,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:25,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1998149459] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:25,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:25,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-21 18:41:25,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256743492] [2021-08-21 18:41:25,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:41:25,389 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:25,389 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:41:25,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:41:25,389 INFO L87 Difference]: Start difference. First operand 9896 states and 22774 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:25,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:25,611 INFO L93 Difference]: Finished difference Result 10143 states and 23083 transitions. [2021-08-21 18:41:25,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:41:25,611 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:41:25,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:25,624 INFO L225 Difference]: With dead ends: 10143 [2021-08-21 18:41:25,624 INFO L226 Difference]: Without dead ends: 10143 [2021-08-21 18:41:25,624 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 142.0ms TimeCoverageRelationStatistics Valid=182, Invalid=468, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:41:25,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10143 states. [2021-08-21 18:41:25,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10143 to 8589. [2021-08-21 18:41:25,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8589 states, 8588 states have (on average 2.3102002794597114) internal successors, (19840), 8588 states have internal predecessors, (19840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:25,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8589 states to 8589 states and 19840 transitions. [2021-08-21 18:41:25,740 INFO L78 Accepts]: Start accepts. Automaton has 8589 states and 19840 transitions. Word has length 28 [2021-08-21 18:41:25,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:25,740 INFO L470 AbstractCegarLoop]: Abstraction has 8589 states and 19840 transitions. [2021-08-21 18:41:25,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:25,740 INFO L276 IsEmpty]: Start isEmpty. Operand 8589 states and 19840 transitions. [2021-08-21 18:41:25,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:41:25,750 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:25,750 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:41:25,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-08-21 18:41:25,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-08-21 18:41:25,950 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:25,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:25,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1339123644, now seen corresponding path program 68 times [2021-08-21 18:41:25,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:25,951 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554687055] [2021-08-21 18:41:25,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:25,951 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:26,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:26,081 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 18:41:26,081 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:26,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554687055] [2021-08-21 18:41:26,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554687055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:26,081 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26552160] [2021-08-21 18:41:26,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:41:26,081 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:26,081 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:26,082 INFO L229 MonitoredProcess]: Starting monitored process 96 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:26,083 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-08-21 18:41:30,125 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:41:30,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:30,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:41:30,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:30,232 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 18:41:30,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26552160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:30,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:30,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-21 18:41:30,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294978685] [2021-08-21 18:41:30,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:41:30,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:30,233 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:41:30,233 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:41:30,233 INFO L87 Difference]: Start difference. First operand 8589 states and 19840 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:30,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:30,479 INFO L93 Difference]: Finished difference Result 8825 states and 20304 transitions. [2021-08-21 18:41:30,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:41:30,479 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:41:30,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:30,490 INFO L225 Difference]: With dead ends: 8825 [2021-08-21 18:41:30,490 INFO L226 Difference]: Without dead ends: 8825 [2021-08-21 18:41:30,491 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 189.9ms TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:41:30,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8825 states. [2021-08-21 18:41:30,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8825 to 8723. [2021-08-21 18:41:30,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8723 states, 8722 states have (on average 2.308186195826645) internal successors, (20132), 8722 states have internal predecessors, (20132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:30,613 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8723 states to 8723 states and 20132 transitions. [2021-08-21 18:41:30,613 INFO L78 Accepts]: Start accepts. Automaton has 8723 states and 20132 transitions. Word has length 28 [2021-08-21 18:41:30,613 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:30,613 INFO L470 AbstractCegarLoop]: Abstraction has 8723 states and 20132 transitions. [2021-08-21 18:41:30,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:30,613 INFO L276 IsEmpty]: Start isEmpty. Operand 8723 states and 20132 transitions. [2021-08-21 18:41:30,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:41:30,622 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:30,622 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:41:30,650 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-08-21 18:41:30,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-08-21 18:41:30,823 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:30,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:30,823 INFO L82 PathProgramCache]: Analyzing trace with hash 2138949308, now seen corresponding path program 69 times [2021-08-21 18:41:30,823 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:30,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130026375] [2021-08-21 18:41:30,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:30,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:30,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:30,946 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 18:41:30,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:30,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130026375] [2021-08-21 18:41:30,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130026375] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:30,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106744851] [2021-08-21 18:41:30,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:41:30,973 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:30,973 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:30,985 INFO L229 MonitoredProcess]: Starting monitored process 97 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:31,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-08-21 18:41:35,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:41:35,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:35,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:41:35,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:35,291 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 18:41:35,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106744851] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:35,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:35,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 13 [2021-08-21 18:41:35,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1754557441] [2021-08-21 18:41:35,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-08-21 18:41:35,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:35,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-08-21 18:41:35,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:41:35,292 INFO L87 Difference]: Start difference. First operand 8723 states and 20132 transitions. Second operand has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:35,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:35,491 INFO L93 Difference]: Finished difference Result 8898 states and 20490 transitions. [2021-08-21 18:41:35,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:41:35,491 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:41:35,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:35,502 INFO L225 Difference]: With dead ends: 8898 [2021-08-21 18:41:35,502 INFO L226 Difference]: Without dead ends: 8898 [2021-08-21 18:41:35,502 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 126.6ms TimeCoverageRelationStatistics Valid=153, Invalid=353, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:41:35,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8898 states. [2021-08-21 18:41:35,587 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8898 to 8713. [2021-08-21 18:41:35,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8713 states, 8712 states have (on average 2.3085399449035813) internal successors, (20112), 8712 states have internal predecessors, (20112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:35,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8713 states to 8713 states and 20112 transitions. [2021-08-21 18:41:35,606 INFO L78 Accepts]: Start accepts. Automaton has 8713 states and 20112 transitions. Word has length 28 [2021-08-21 18:41:35,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:35,606 INFO L470 AbstractCegarLoop]: Abstraction has 8713 states and 20112 transitions. [2021-08-21 18:41:35,606 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:35,606 INFO L276 IsEmpty]: Start isEmpty. Operand 8713 states and 20112 transitions. [2021-08-21 18:41:35,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:41:35,615 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:35,615 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:41:35,644 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-08-21 18:41:35,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:35,825 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:35,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:35,825 INFO L82 PathProgramCache]: Analyzing trace with hash -424171844, now seen corresponding path program 70 times [2021-08-21 18:41:35,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:35,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843836614] [2021-08-21 18:41:35,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:35,825 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:35,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:35,896 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:35,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:35,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843836614] [2021-08-21 18:41:35,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843836614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:35,897 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [274672344] [2021-08-21 18:41:35,897 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:41:35,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:35,897 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:35,899 INFO L229 MonitoredProcess]: Starting monitored process 98 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:35,900 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-08-21 18:41:39,986 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:41:39,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:39,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:41:39,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:40,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:40,104 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [274672344] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:40,104 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:40,104 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 14 [2021-08-21 18:41:40,104 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [133470932] [2021-08-21 18:41:40,104 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-08-21 18:41:40,104 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:40,105 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-08-21 18:41:40,105 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:41:40,105 INFO L87 Difference]: Start difference. First operand 8713 states and 20112 transitions. Second operand has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:40,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:40,358 INFO L93 Difference]: Finished difference Result 8930 states and 20547 transitions. [2021-08-21 18:41:40,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:41:40,358 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:41:40,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:40,369 INFO L225 Difference]: With dead ends: 8930 [2021-08-21 18:41:40,369 INFO L226 Difference]: Without dead ends: 8930 [2021-08-21 18:41:40,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 138.1ms TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:41:40,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8930 states. [2021-08-21 18:41:40,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8930 to 8706. [2021-08-21 18:41:40,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8706 states, 8705 states have (on average 2.3080987937966686) internal successors, (20092), 8705 states have internal predecessors, (20092), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:40,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8706 states to 8706 states and 20092 transitions. [2021-08-21 18:41:40,473 INFO L78 Accepts]: Start accepts. Automaton has 8706 states and 20092 transitions. Word has length 28 [2021-08-21 18:41:40,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:40,473 INFO L470 AbstractCegarLoop]: Abstraction has 8706 states and 20092 transitions. [2021-08-21 18:41:40,473 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.857142857142857) internal successors, (40), 14 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:40,473 INFO L276 IsEmpty]: Start isEmpty. Operand 8706 states and 20092 transitions. [2021-08-21 18:41:40,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:41:40,482 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:40,482 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:41:40,509 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-08-21 18:41:40,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:40,683 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:40,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:40,683 INFO L82 PathProgramCache]: Analyzing trace with hash -510371878, now seen corresponding path program 71 times [2021-08-21 18:41:40,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:40,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985299139] [2021-08-21 18:41:40,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:40,683 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:40,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:42,542 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:42,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:42,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985299139] [2021-08-21 18:41:42,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985299139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:42,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405062880] [2021-08-21 18:41:42,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:41:42,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:42,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:42,543 INFO L229 MonitoredProcess]: Starting monitored process 99 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:42,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-08-21 18:41:46,590 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:41:46,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:46,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:41:46,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:50,545 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-21 18:41:50,545 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 237 treesize of output 154 [2021-08-21 18:41:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:51,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [405062880] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:51,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:51,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:41:51,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119209849] [2021-08-21 18:41:51,182 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:41:51,182 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:51,182 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:41:51,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=381, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:41:51,183 INFO L87 Difference]: Start difference. First operand 8706 states and 20092 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:56,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:56,270 INFO L93 Difference]: Finished difference Result 9271 states and 21057 transitions. [2021-08-21 18:41:56,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:41:56,271 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:41:56,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:56,283 INFO L225 Difference]: With dead ends: 9271 [2021-08-21 18:41:56,283 INFO L226 Difference]: Without dead ends: 9241 [2021-08-21 18:41:56,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 5515.9ms TimeCoverageRelationStatistics Valid=347, Invalid=1545, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:41:56,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9241 states. [2021-08-21 18:41:56,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9241 to 8763. [2021-08-21 18:41:56,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8763 states, 8762 states have (on average 2.3088335996347866) internal successors, (20230), 8762 states have internal predecessors, (20230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:56,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8763 states to 8763 states and 20230 transitions. [2021-08-21 18:41:56,391 INFO L78 Accepts]: Start accepts. Automaton has 8763 states and 20230 transitions. Word has length 30 [2021-08-21 18:41:56,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:56,391 INFO L470 AbstractCegarLoop]: Abstraction has 8763 states and 20230 transitions. [2021-08-21 18:41:56,391 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:56,391 INFO L276 IsEmpty]: Start isEmpty. Operand 8763 states and 20230 transitions. [2021-08-21 18:41:56,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:41:56,400 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:56,400 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:41:56,429 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-08-21 18:41:56,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-08-21 18:41:56,600 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:56,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:56,601 INFO L82 PathProgramCache]: Analyzing trace with hash -256582754, now seen corresponding path program 72 times [2021-08-21 18:41:56,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:56,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881379287] [2021-08-21 18:41:56,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:56,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:56,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:57,690 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:57,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:57,690 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881379287] [2021-08-21 18:41:57,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881379287] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:57,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758636716] [2021-08-21 18:41:57,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:41:57,691 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:57,691 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:57,691 INFO L229 MonitoredProcess]: Starting monitored process 100 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:41:57,692 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-08-21 18:42:01,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:42:01,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:42:01,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:42:01,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:25,630 INFO L354 Elim1Store]: treesize reduction 66, result has 9.6 percent of original size [2021-08-21 18:42:25,630 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 223 treesize of output 153 [2021-08-21 18:42:26,378 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:26,378 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1758636716] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:26,378 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:42:26,378 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:42:26,378 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474382503] [2021-08-21 18:42:26,379 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:42:26,379 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:42:26,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:42:26,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=377, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:42:26,379 INFO L87 Difference]: Start difference. First operand 8763 states and 20230 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:31,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:42:31,457 INFO L93 Difference]: Finished difference Result 10575 states and 24241 transitions. [2021-08-21 18:42:31,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:42:31,458 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:42:31,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:42:31,475 INFO L225 Difference]: With dead ends: 10575 [2021-08-21 18:42:31,475 INFO L226 Difference]: Without dead ends: 10560 [2021-08-21 18:42:31,475 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 643 ImplicationChecksByTransitivity, 5124.9ms TimeCoverageRelationStatistics Valid=408, Invalid=1848, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:42:31,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10560 states. [2021-08-21 18:42:31,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10560 to 8769. [2021-08-21 18:42:31,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8769 states, 8768 states have (on average 2.3088503649635035) internal successors, (20244), 8768 states have internal predecessors, (20244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:31,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8769 states to 8769 states and 20244 transitions. [2021-08-21 18:42:31,612 INFO L78 Accepts]: Start accepts. Automaton has 8769 states and 20244 transitions. Word has length 30 [2021-08-21 18:42:31,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:42:31,612 INFO L470 AbstractCegarLoop]: Abstraction has 8769 states and 20244 transitions. [2021-08-21 18:42:31,612 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:31,612 INFO L276 IsEmpty]: Start isEmpty. Operand 8769 states and 20244 transitions. [2021-08-21 18:42:31,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:42:31,623 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:42:31,623 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:42:31,652 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Ended with exit code 0 [2021-08-21 18:42:31,826 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:31,827 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:42:31,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:42:31,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1934847834, now seen corresponding path program 73 times [2021-08-21 18:42:31,827 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:42:31,827 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557067463] [2021-08-21 18:42:31,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:42:31,827 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:42:31,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:33,059 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:33,059 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:42:33,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557067463] [2021-08-21 18:42:33,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557067463] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:33,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392045513] [2021-08-21 18:42:33,059 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:42:33,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:33,059 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:42:33,060 INFO L229 MonitoredProcess]: Starting monitored process 101 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:42:33,062 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-08-21 18:42:37,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:37,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 18:42:37,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:39,453 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-21 18:42:39,454 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 221 treesize of output 145 [2021-08-21 18:42:40,089 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:40,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [392045513] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:40,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:42:40,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 22 [2021-08-21 18:42:40,090 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681753133] [2021-08-21 18:42:40,090 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:42:40,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:42:40,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:42:40,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=397, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:42:40,090 INFO L87 Difference]: Start difference. First operand 8769 states and 20244 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:47,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:42:47,091 INFO L93 Difference]: Finished difference Result 9584 states and 21628 transitions. [2021-08-21 18:42:47,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:42:47,092 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:42:47,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:42:47,105 INFO L225 Difference]: With dead ends: 9584 [2021-08-21 18:42:47,106 INFO L226 Difference]: Without dead ends: 9574 [2021-08-21 18:42:47,106 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 703 ImplicationChecksByTransitivity, 7276.7ms TimeCoverageRelationStatistics Valid=359, Invalid=2397, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 18:42:47,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9574 states. [2021-08-21 18:42:47,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9574 to 8783. [2021-08-21 18:42:47,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8783 states, 8782 states have (on average 2.309496697790936) internal successors, (20282), 8782 states have internal predecessors, (20282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:47,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8783 states to 8783 states and 20282 transitions. [2021-08-21 18:42:47,227 INFO L78 Accepts]: Start accepts. Automaton has 8783 states and 20282 transitions. Word has length 30 [2021-08-21 18:42:47,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:42:47,227 INFO L470 AbstractCegarLoop]: Abstraction has 8783 states and 20282 transitions. [2021-08-21 18:42:47,227 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:47,227 INFO L276 IsEmpty]: Start isEmpty. Operand 8783 states and 20282 transitions. [2021-08-21 18:42:47,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:42:47,237 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:42:47,237 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:42:47,266 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-08-21 18:42:47,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-08-21 18:42:47,437 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:42:47,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:42:47,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1019744218, now seen corresponding path program 74 times [2021-08-21 18:42:47,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:42:47,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [333219094] [2021-08-21 18:42:47,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:42:47,438 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:42:47,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:48,848 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:48,848 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:42:48,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [333219094] [2021-08-21 18:42:48,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [333219094] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:48,848 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1261852615] [2021-08-21 18:42:48,848 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:42:48,848 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:48,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:42:48,849 INFO L229 MonitoredProcess]: Starting monitored process 102 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:42:48,849 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-08-21 18:42:53,432 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:42:53,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:42:53,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:42:53,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:57,021 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:42:57,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 227 treesize of output 191 [2021-08-21 18:43:06,882 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:06,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1261852615] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:06,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:43:06,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-21 18:43:06,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929883396] [2021-08-21 18:43:06,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:43:06,883 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:43:06,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:43:06,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:43:06,884 INFO L87 Difference]: Start difference. First operand 8783 states and 20282 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:16,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:43:16,114 INFO L93 Difference]: Finished difference Result 9270 states and 21091 transitions. [2021-08-21 18:43:16,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 18:43:16,115 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:43:16,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:43:16,127 INFO L225 Difference]: With dead ends: 9270 [2021-08-21 18:43:16,127 INFO L226 Difference]: Without dead ends: 9260 [2021-08-21 18:43:16,127 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 790 ImplicationChecksByTransitivity, 9282.6ms TimeCoverageRelationStatistics Valid=398, Invalid=2572, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:43:16,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9260 states. [2021-08-21 18:43:16,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9260 to 8793. [2021-08-21 18:43:16,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8793 states, 8792 states have (on average 2.3093721565059147) internal successors, (20304), 8792 states have internal predecessors, (20304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:16,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8793 states to 8793 states and 20304 transitions. [2021-08-21 18:43:16,234 INFO L78 Accepts]: Start accepts. Automaton has 8793 states and 20304 transitions. Word has length 30 [2021-08-21 18:43:16,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:43:16,235 INFO L470 AbstractCegarLoop]: Abstraction has 8793 states and 20304 transitions. [2021-08-21 18:43:16,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:16,235 INFO L276 IsEmpty]: Start isEmpty. Operand 8793 states and 20304 transitions. [2021-08-21 18:43:16,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:43:16,244 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:43:16,244 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:43:16,274 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-08-21 18:43:16,445 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-08-21 18:43:16,445 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:43:16,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:43:16,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1167653030, now seen corresponding path program 75 times [2021-08-21 18:43:16,445 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:43:16,445 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105944074] [2021-08-21 18:43:16,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:43:16,445 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:43:16,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:43:17,591 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:17,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:43:17,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105944074] [2021-08-21 18:43:17,591 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1105944074] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:17,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728104696] [2021-08-21 18:43:17,591 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:43:17,591 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:17,591 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:43:17,592 INFO L229 MonitoredProcess]: Starting monitored process 103 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:43:17,592 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-08-21 18:43:22,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:43:22,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:43:22,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 37 conjunts are in the unsatisfiable core [2021-08-21 18:43:22,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:43:27,326 INFO L354 Elim1Store]: treesize reduction 29, result has 60.3 percent of original size [2021-08-21 18:43:27,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 231 treesize of output 198 [2021-08-21 18:43:35,769 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:35,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728104696] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:35,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:43:35,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 26 [2021-08-21 18:43:35,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53301733] [2021-08-21 18:43:35,769 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:43:35,769 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:43:35,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:43:35,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:43:35,770 INFO L87 Difference]: Start difference. First operand 8793 states and 20304 transitions. Second operand has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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 18:43:42,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:43:42,782 INFO L93 Difference]: Finished difference Result 9633 states and 21727 transitions. [2021-08-21 18:43:42,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 18:43:42,783 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:43:42,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:43:42,795 INFO L225 Difference]: With dead ends: 9633 [2021-08-21 18:43:42,795 INFO L226 Difference]: Without dead ends: 9623 [2021-08-21 18:43:42,795 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1147 ImplicationChecksByTransitivity, 7256.3ms TimeCoverageRelationStatistics Valid=489, Invalid=3801, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 18:43:42,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9623 states. [2021-08-21 18:43:42,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9623 to 8799. [2021-08-21 18:43:42,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8799 states, 8798 states have (on average 2.309274835189816) internal successors, (20317), 8798 states have internal predecessors, (20317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:42,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8799 states to 8799 states and 20317 transitions. [2021-08-21 18:43:42,912 INFO L78 Accepts]: Start accepts. Automaton has 8799 states and 20317 transitions. Word has length 30 [2021-08-21 18:43:42,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:43:42,912 INFO L470 AbstractCegarLoop]: Abstraction has 8799 states and 20317 transitions. [2021-08-21 18:43:42,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.1538461538461537) internal successors, (56), 26 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 18:43:42,912 INFO L276 IsEmpty]: Start isEmpty. Operand 8799 states and 20317 transitions. [2021-08-21 18:43:42,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:43:42,922 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:43:42,922 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:43:42,954 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-08-21 18:43:43,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-08-21 18:43:43,123 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:43:43,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:43:43,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1635819354, now seen corresponding path program 76 times [2021-08-21 18:43:43,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:43:43,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837759924] [2021-08-21 18:43:43,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:43:43,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:43:43,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:43:44,146 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:44,146 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:43:44,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837759924] [2021-08-21 18:43:44,146 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837759924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:44,146 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399633259] [2021-08-21 18:43:44,146 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:43:44,146 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:44,147 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:43:44,147 INFO L229 MonitoredProcess]: Starting monitored process 104 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:43:44,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-08-21 18:43:49,217 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:43:49,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:43:49,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 33 conjunts are in the unsatisfiable core [2021-08-21 18:43:49,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:43:52,578 INFO L354 Elim1Store]: treesize reduction 66, result has 9.6 percent of original size [2021-08-21 18:43:52,578 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 225 treesize of output 155 [2021-08-21 18:43:53,250 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:53,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399633259] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:53,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:43:53,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 18:43:53,251 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950403411] [2021-08-21 18:43:53,251 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:43:53,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:43:53,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:43:53,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=441, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:43:53,251 INFO L87 Difference]: Start difference. First operand 8799 states and 20317 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:57,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:43:57,912 INFO L93 Difference]: Finished difference Result 11386 states and 26128 transitions. [2021-08-21 18:43:57,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 18:43:57,913 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:43:57,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:43:57,929 INFO L225 Difference]: With dead ends: 11386 [2021-08-21 18:43:57,929 INFO L226 Difference]: Without dead ends: 11362 [2021-08-21 18:43:57,930 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 4700.2ms TimeCoverageRelationStatistics Valid=343, Invalid=2519, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 18:43:57,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11362 states. [2021-08-21 18:43:58,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11362 to 8843. [2021-08-21 18:43:58,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8843 states, 8842 states have (on average 2.3077358063786475) internal successors, (20405), 8842 states have internal predecessors, (20405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:58,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8843 states to 8843 states and 20405 transitions. [2021-08-21 18:43:58,062 INFO L78 Accepts]: Start accepts. Automaton has 8843 states and 20405 transitions. Word has length 30 [2021-08-21 18:43:58,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:43:58,062 INFO L470 AbstractCegarLoop]: Abstraction has 8843 states and 20405 transitions. [2021-08-21 18:43:58,062 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:58,062 INFO L276 IsEmpty]: Start isEmpty. Operand 8843 states and 20405 transitions. [2021-08-21 18:43:58,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:43:58,072 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:43:58,072 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:43:58,103 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-08-21 18:43:58,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:58,272 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:43:58,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:43:58,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1094509922, now seen corresponding path program 77 times [2021-08-21 18:43:58,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:43:58,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777077890] [2021-08-21 18:43:58,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:43:58,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:43:58,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:43:59,454 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:59,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:43:59,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777077890] [2021-08-21 18:43:59,454 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777077890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:59,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344833228] [2021-08-21 18:43:59,455 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:43:59,455 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:59,455 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:43:59,455 INFO L229 MonitoredProcess]: Starting monitored process 105 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:43:59,456 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-08-21 18:44:04,723 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:44:04,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:44:04,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:44:04,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:09,920 INFO L354 Elim1Store]: treesize reduction 38, result has 7.3 percent of original size [2021-08-21 18:44:09,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 218 treesize of output 145 [2021-08-21 18:44:10,764 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:10,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1344833228] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:10,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:10,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 22 [2021-08-21 18:44:10,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656867823] [2021-08-21 18:44:10,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-08-21 18:44:10,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:10,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-08-21 18:44:10,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:44:10,765 INFO L87 Difference]: Start difference. First operand 8843 states and 20405 transitions. Second operand has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:16,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:44:16,358 INFO L93 Difference]: Finished difference Result 10737 states and 24543 transitions. [2021-08-21 18:44:16,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:44:16,359 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:44:16,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:44:16,374 INFO L225 Difference]: With dead ends: 10737 [2021-08-21 18:44:16,374 INFO L226 Difference]: Without dead ends: 10722 [2021-08-21 18:44:16,374 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 5569.6ms TimeCoverageRelationStatistics Valid=440, Invalid=1912, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 18:44:16,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10722 states. [2021-08-21 18:44:16,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10722 to 8881. [2021-08-21 18:44:16,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8881 states, 8880 states have (on average 2.3057432432432434) internal successors, (20475), 8880 states have internal predecessors, (20475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:16,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8881 states to 8881 states and 20475 transitions. [2021-08-21 18:44:16,497 INFO L78 Accepts]: Start accepts. Automaton has 8881 states and 20475 transitions. Word has length 30 [2021-08-21 18:44:16,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:44:16,497 INFO L470 AbstractCegarLoop]: Abstraction has 8881 states and 20475 transitions. [2021-08-21 18:44:16,498 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.5454545454545454) internal successors, (56), 22 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:16,498 INFO L276 IsEmpty]: Start isEmpty. Operand 8881 states and 20475 transitions. [2021-08-21 18:44:16,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:44:16,507 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:16,507 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:44:16,539 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Forceful destruction successful, exit code 0 [2021-08-21 18:44:16,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:16,708 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:44:16,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:16,708 INFO L82 PathProgramCache]: Analyzing trace with hash 1013060126, now seen corresponding path program 78 times [2021-08-21 18:44:16,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:16,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562078087] [2021-08-21 18:44:16,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:16,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:18,090 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:18,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562078087] [2021-08-21 18:44:18,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562078087] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:18,090 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770281775] [2021-08-21 18:44:18,090 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:44:18,091 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:18,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:18,091 INFO L229 MonitoredProcess]: Starting monitored process 106 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:44:18,092 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-08-21 18:44:23,490 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:44:23,490 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:44:23,491 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 18:44:23,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:25,613 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-21 18:44:25,613 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 3 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 7 case distinctions, treesize of input 221 treesize of output 145 [2021-08-21 18:44:26,235 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:26,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770281775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:26,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:26,235 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 23 [2021-08-21 18:44:26,235 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641684975] [2021-08-21 18:44:26,235 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:44:26,236 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:26,236 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:44:26,236 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=439, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:44:26,236 INFO L87 Difference]: Start difference. First operand 8881 states and 20475 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:33,229 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:44:33,229 INFO L93 Difference]: Finished difference Result 9716 states and 21888 transitions. [2021-08-21 18:44:33,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 18:44:33,229 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:44:33,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:44:33,243 INFO L225 Difference]: With dead ends: 9716 [2021-08-21 18:44:33,243 INFO L226 Difference]: Without dead ends: 9706 [2021-08-21 18:44:33,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 7279.3ms TimeCoverageRelationStatistics Valid=426, Invalid=2880, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 18:44:33,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9706 states. [2021-08-21 18:44:33,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9706 to 8893. [2021-08-21 18:44:33,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8893 states, 8892 states have (on average 2.30510571300045) internal successors, (20497), 8892 states have internal predecessors, (20497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:33,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8893 states to 8893 states and 20497 transitions. [2021-08-21 18:44:33,362 INFO L78 Accepts]: Start accepts. Automaton has 8893 states and 20497 transitions. Word has length 30 [2021-08-21 18:44:33,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:44:33,363 INFO L470 AbstractCegarLoop]: Abstraction has 8893 states and 20497 transitions. [2021-08-21 18:44:33,363 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:33,363 INFO L276 IsEmpty]: Start isEmpty. Operand 8893 states and 20497 transitions. [2021-08-21 18:44:33,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:44:33,373 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:33,373 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:44:33,406 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Ended with exit code 0 [2021-08-21 18:44:33,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-08-21 18:44:33,573 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:44:33,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:33,573 INFO L82 PathProgramCache]: Analyzing trace with hash 1266849250, now seen corresponding path program 79 times [2021-08-21 18:44:33,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:33,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736854773] [2021-08-21 18:44:33,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:33,574 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:33,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:34,741 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:34,741 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:34,741 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736854773] [2021-08-21 18:44:34,742 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736854773] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:34,742 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358017030] [2021-08-21 18:44:34,742 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:44:34,742 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:34,742 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:34,742 INFO L229 MonitoredProcess]: Starting monitored process 107 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:44:34,743 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-08-21 18:44:40,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:40,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 18:44:40,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:48,634 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:44:48,652 INFO L354 Elim1Store]: treesize reduction 58, result has 10.8 percent of original size [2021-08-21 18:44:48,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 2 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 8 case distinctions, treesize of input 241 treesize of output 161 [2021-08-21 18:44:49,429 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:49,429 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358017030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:49,429 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:49,429 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 24 [2021-08-21 18:44:49,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1019282147] [2021-08-21 18:44:49,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:44:49,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:49,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:44:49,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=481, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:44:49,430 INFO L87 Difference]: Start difference. First operand 8893 states and 20497 transitions. Second operand has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 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 18:44:55,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:44:55,681 INFO L93 Difference]: Finished difference Result 11426 states and 26218 transitions. [2021-08-21 18:44:55,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 18:44:55,682 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:44:55,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:44:55,696 INFO L225 Difference]: With dead ends: 11426 [2021-08-21 18:44:55,696 INFO L226 Difference]: Without dead ends: 11416 [2021-08-21 18:44:55,697 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 6426.2ms TimeCoverageRelationStatistics Valid=457, Invalid=3325, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:44:55,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11416 states. [2021-08-21 18:44:55,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11416 to 8913. [2021-08-21 18:44:55,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8913 states, 8912 states have (on average 2.3037477558348294) internal successors, (20531), 8912 states have internal predecessors, (20531), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:55,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8913 states to 8913 states and 20531 transitions. [2021-08-21 18:44:55,819 INFO L78 Accepts]: Start accepts. Automaton has 8913 states and 20531 transitions. Word has length 30 [2021-08-21 18:44:55,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:44:55,819 INFO L470 AbstractCegarLoop]: Abstraction has 8913 states and 20531 transitions. [2021-08-21 18:44:55,819 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.3333333333333335) internal successors, (56), 24 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 18:44:55,819 INFO L276 IsEmpty]: Start isEmpty. Operand 8913 states and 20531 transitions. [2021-08-21 18:44:55,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:44:55,829 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:55,829 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:44:55,863 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Ended with exit code 0 [2021-08-21 18:44:56,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:56,029 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:44:56,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:56,030 INFO L82 PathProgramCache]: Analyzing trace with hash -1851087142, now seen corresponding path program 28 times [2021-08-21 18:44:56,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:56,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573038924] [2021-08-21 18:44:56,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:56,030 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:56,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:58,167 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:58,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:58,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573038924] [2021-08-21 18:44:58,168 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573038924] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:58,168 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051206519] [2021-08-21 18:44:58,168 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:44:58,168 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:58,168 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:58,169 INFO L229 MonitoredProcess]: Starting monitored process 108 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:44:58,170 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-08-21 18:45:03,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:45:03,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:45:03,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:45:03,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:45:06,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:45:06,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:45:06,091 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-08-21 18:45:06,119 INFO L354 Elim1Store]: treesize reduction 119, result has 7.8 percent of original size [2021-08-21 18:45:06,120 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 302 treesize of output 159 [2021-08-21 18:45:06,412 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:06,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2051206519] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:06,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:45:06,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 18:45:06,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346866810] [2021-08-21 18:45:06,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:45:06,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:45:06,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:45:06,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=436, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:45:06,413 INFO L87 Difference]: Start difference. First operand 8913 states and 20531 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 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 18:45:11,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:45:11,983 INFO L93 Difference]: Finished difference Result 8967 states and 20598 transitions. [2021-08-21 18:45:11,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:45:11,983 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:45:11,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:45:12,001 INFO L225 Difference]: With dead ends: 8967 [2021-08-21 18:45:12,001 INFO L226 Difference]: Without dead ends: 8957 [2021-08-21 18:45:12,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 5998.1ms TimeCoverageRelationStatistics Valid=412, Invalid=2450, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 18:45:12,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8957 states. [2021-08-21 18:45:12,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8957 to 8917. [2021-08-21 18:45:12,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8917 states, 8916 states have (on average 2.303275011215792) internal successors, (20536), 8916 states have internal predecessors, (20536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:12,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8917 states to 8917 states and 20536 transitions. [2021-08-21 18:45:12,115 INFO L78 Accepts]: Start accepts. Automaton has 8917 states and 20536 transitions. Word has length 30 [2021-08-21 18:45:12,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:45:12,116 INFO L470 AbstractCegarLoop]: Abstraction has 8917 states and 20536 transitions. [2021-08-21 18:45:12,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 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 18:45:12,116 INFO L276 IsEmpty]: Start isEmpty. Operand 8917 states and 20536 transitions. [2021-08-21 18:45:12,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:45:12,125 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:45:12,126 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:45:12,160 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Forceful destruction successful, exit code 0 [2021-08-21 18:45:12,326 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:12,326 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:45:12,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:45:12,326 INFO L82 PathProgramCache]: Analyzing trace with hash 2006105946, now seen corresponding path program 80 times [2021-08-21 18:45:12,327 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:45:12,327 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340608451] [2021-08-21 18:45:12,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:45:12,327 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:45:12,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:13,216 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:45:13,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340608451] [2021-08-21 18:45:13,216 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340608451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:13,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030704239] [2021-08-21 18:45:13,216 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:45:13,216 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:13,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:45:13,217 INFO L229 MonitoredProcess]: Starting monitored process 109 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:45:13,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-08-21 18:45:19,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:45:19,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:45:19,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:45:19,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:45:22,691 INFO L354 Elim1Store]: treesize reduction 66, result has 9.6 percent of original size [2021-08-21 18:45:22,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 1 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 9 case distinctions, treesize of input 219 treesize of output 151 [2021-08-21 18:45:23,291 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:23,291 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030704239] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:23,291 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:45:23,291 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-08-21 18:45:23,291 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460404339] [2021-08-21 18:45:23,291 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:45:23,291 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:45:23,292 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:45:23,292 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=485, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:45:23,292 INFO L87 Difference]: Start difference. First operand 8917 states and 20536 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 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 18:45:29,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:45:29,694 INFO L93 Difference]: Finished difference Result 11568 states and 26460 transitions. [2021-08-21 18:45:29,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 18:45:29,695 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:45:29,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:45:29,710 INFO L225 Difference]: With dead ends: 11568 [2021-08-21 18:45:29,710 INFO L226 Difference]: Without dead ends: 11540 [2021-08-21 18:45:29,711 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 963 ImplicationChecksByTransitivity, 6189.3ms TimeCoverageRelationStatistics Valid=431, Invalid=3351, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:45:29,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11540 states. [2021-08-21 18:45:29,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11540 to 8979. [2021-08-21 18:45:29,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8979 states, 8978 states have (on average 2.300846513700156) internal successors, (20657), 8978 states have internal predecessors, (20657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:29,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8979 states to 8979 states and 20657 transitions. [2021-08-21 18:45:29,846 INFO L78 Accepts]: Start accepts. Automaton has 8979 states and 20657 transitions. Word has length 30 [2021-08-21 18:45:29,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:45:29,846 INFO L470 AbstractCegarLoop]: Abstraction has 8979 states and 20657 transitions. [2021-08-21 18:45:29,846 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 24 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 18:45:29,846 INFO L276 IsEmpty]: Start isEmpty. Operand 8979 states and 20657 transitions. [2021-08-21 18:45:29,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:45:29,855 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:45:29,855 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:45:29,889 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-08-21 18:45:30,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:30,056 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:45:30,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:45:30,056 INFO L82 PathProgramCache]: Analyzing trace with hash 1647853274, now seen corresponding path program 29 times [2021-08-21 18:45:30,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:45:30,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859423658] [2021-08-21 18:45:30,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:45:30,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:45:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:31,831 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:31,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:45:31,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859423658] [2021-08-21 18:45:31,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859423658] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:31,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667434394] [2021-08-21 18:45:31,832 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:45:31,832 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:31,832 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:45:31,832 INFO L229 MonitoredProcess]: Starting monitored process 110 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:45:31,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-08-21 18:45:37,954 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-08-21 18:45:37,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:45:37,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:45:37,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:45:40,038 INFO L354 Elim1Store]: treesize reduction 107, result has 8.5 percent of original size [2021-08-21 18:45:40,038 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 3 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 12 case distinctions, treesize of input 256 treesize of output 157 [2021-08-21 18:45:40,339 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:40,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1667434394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:40,340 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:45:40,340 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 22 [2021-08-21 18:45:40,340 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385461497] [2021-08-21 18:45:40,340 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:45:40,340 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:45:40,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:45:40,340 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:45:40,340 INFO L87 Difference]: Start difference. First operand 8979 states and 20657 transitions. Second operand has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 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 18:45:49,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:45:49,475 INFO L93 Difference]: Finished difference Result 9075 states and 20786 transitions. [2021-08-21 18:45:49,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 18:45:49,476 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:45:49,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:45:49,489 INFO L225 Difference]: With dead ends: 9075 [2021-08-21 18:45:49,489 INFO L226 Difference]: Without dead ends: 9065 [2021-08-21 18:45:49,490 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1082 ImplicationChecksByTransitivity, 9445.3ms TimeCoverageRelationStatistics Valid=608, Invalid=3552, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 18:45:49,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9065 states. [2021-08-21 18:45:49,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9065 to 8979. [2021-08-21 18:45:49,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8979 states, 8978 states have (on average 2.300846513700156) internal successors, (20657), 8978 states have internal predecessors, (20657), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:49,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8979 states to 8979 states and 20657 transitions. [2021-08-21 18:45:49,600 INFO L78 Accepts]: Start accepts. Automaton has 8979 states and 20657 transitions. Word has length 30 [2021-08-21 18:45:49,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:45:49,600 INFO L470 AbstractCegarLoop]: Abstraction has 8979 states and 20657 transitions. [2021-08-21 18:45:49,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.4782608695652173) internal successors, (57), 22 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 18:45:49,600 INFO L276 IsEmpty]: Start isEmpty. Operand 8979 states and 20657 transitions. [2021-08-21 18:45:49,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:45:49,610 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:45:49,610 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:45:49,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-08-21 18:45:49,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-08-21 18:45:49,810 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:45:49,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:45:49,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1454647590, now seen corresponding path program 30 times [2021-08-21 18:45:49,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:45:49,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262148230] [2021-08-21 18:45:49,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:45:49,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:45:49,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:50,989 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:50,990 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:45:50,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262148230] [2021-08-21 18:45:50,990 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262148230] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:50,990 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265122847] [2021-08-21 18:45:50,990 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:45:50,990 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:50,990 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:45:50,998 INFO L229 MonitoredProcess]: Starting monitored process 111 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:45:50,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-08-21 18:45:57,350 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-08-21 18:45:57,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:45:57,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 18:45:57,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:01,481 INFO L354 Elim1Store]: treesize reduction 113, result has 8.1 percent of original size [2021-08-21 18:46:01,481 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 1 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 14 case distinctions, treesize of input 254 treesize of output 167 [2021-08-21 18:46:01,800 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:01,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265122847] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:01,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:01,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12] total 23 [2021-08-21 18:46:01,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846735347] [2021-08-21 18:46:01,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:46:01,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:01,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:46:01,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=483, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:46:01,801 INFO L87 Difference]: Start difference. First operand 8979 states and 20657 transitions. Second operand has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:11,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:11,249 INFO L93 Difference]: Finished difference Result 9129 states and 20871 transitions. [2021-08-21 18:46:11,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 18:46:11,250 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-08-21 18:46:11,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:11,263 INFO L225 Difference]: With dead ends: 9129 [2021-08-21 18:46:11,263 INFO L226 Difference]: Without dead ends: 9091 [2021-08-21 18:46:11,264 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1193 ImplicationChecksByTransitivity, 9034.5ms TimeCoverageRelationStatistics Valid=664, Invalid=4166, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 18:46:11,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9091 states. [2021-08-21 18:46:11,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9091 to 8983. [2021-08-21 18:46:11,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8983 states, 8982 states have (on average 2.300267201068804) internal successors, (20661), 8982 states have internal predecessors, (20661), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:11,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8983 states to 8983 states and 20661 transitions. [2021-08-21 18:46:11,381 INFO L78 Accepts]: Start accepts. Automaton has 8983 states and 20661 transitions. Word has length 30 [2021-08-21 18:46:11,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:11,381 INFO L470 AbstractCegarLoop]: Abstraction has 8983 states and 20661 transitions. [2021-08-21 18:46:11,381 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.375) internal successors, (57), 23 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:11,382 INFO L276 IsEmpty]: Start isEmpty. Operand 8983 states and 20661 transitions. [2021-08-21 18:46:11,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-08-21 18:46:11,391 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:11,391 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:46:11,428 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-08-21 18:46:11,591 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2021-08-21 18:46:11,592 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:11,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:11,592 INFO L82 PathProgramCache]: Analyzing trace with hash -988024870, now seen corresponding path program 81 times [2021-08-21 18:46:11,592 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:11,592 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254278449] [2021-08-21 18:46:11,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:11,592 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:11,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:12,866 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:12,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:12,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254278449] [2021-08-21 18:46:12,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254278449] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:12,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1914065042] [2021-08-21 18:46:12,867 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:46:12,867 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:12,867 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:12,868 INFO L229 MonitoredProcess]: Starting monitored process 112 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-08-21 18:46:12,868 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-08-21 18:46:19,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:46:19,311 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:19,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 35 conjunts are in the unsatisfiable core [2021-08-21 18:46:19,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:23,561 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-08-21 18:46:23,561 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 246 treesize of output 200 [2021-08-21 18:46:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:32,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1914065042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:32,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:32,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14] total 23 [2021-08-21 18:46:32,862 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937642484] [2021-08-21 18:46:32,862 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:46:32,862 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:32,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:46:32,863 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=433, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:46:32,863 INFO L87 Difference]: Start difference. First operand 8983 states and 20661 transitions. Second operand has 23 states, 23 states have (on average 2.4347826086956523) internal successors, (56), 23 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-08-21 18:46:38,978 WARN L223 SmtUtils]: Removed 4 from assertion stack [2021-08-21 18:46:38,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:46:38,979 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 18:46:39,017 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-08-21 18:46:39,018 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 18:46:39,018 WARN L340 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Timeout while monitored process is still running, waiting 1000 ms for graceful end [2021-08-21 18:46:39,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-08-21 18:46:39,179 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was constructing difference of abstraction (8983states) and FLOYD_HOARE automaton (currently 23 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 160 for 238ms.. [2021-08-21 18:46:39,181 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 18:46:39,181 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 18:46:39,181 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 18:46:39,183 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 18:46:39,184 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 18:46:39,185 INFO L202 PluginConnector]: Adding new model min-fun.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:46:39 BasicIcfg [2021-08-21 18:46:39,185 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 18:46:39,185 INFO L168 Benchmark]: Toolchain (without parser) took 734460.10 ms. Allocated memory was 212.9 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 192.3 MB in the beginning and 1.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.3 GB. Max. memory is 8.0 GB. [2021-08-21 18:46:39,185 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.43 ms. Allocated memory is still 212.9 MB. Free memory is still 193.5 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:46:39,185 INFO L168 Benchmark]: Boogie Procedure Inliner took 21.12 ms. Allocated memory is still 212.9 MB. Free memory was 192.3 MB in the beginning and 190.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:46:39,185 INFO L168 Benchmark]: Boogie Preprocessor took 19.86 ms. Allocated memory is still 212.9 MB. Free memory was 190.8 MB in the beginning and 189.8 MB in the end (delta: 996.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:46:39,185 INFO L168 Benchmark]: RCFGBuilder took 281.41 ms. Allocated memory is still 212.9 MB. Free memory was 189.7 MB in the beginning and 176.5 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-21 18:46:39,185 INFO L168 Benchmark]: TraceAbstraction took 734133.05 ms. Allocated memory was 212.9 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 176.0 MB in the beginning and 1.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. [2021-08-21 18:46:39,186 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 0.43 ms. Allocated memory is still 212.9 MB. Free memory is still 193.5 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 21.12 ms. Allocated memory is still 212.9 MB. Free memory was 192.3 MB in the beginning and 190.8 MB in the end (delta: 1.6 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 19.86 ms. Allocated memory is still 212.9 MB. Free memory was 190.8 MB in the beginning and 189.8 MB in the end (delta: 996.0 kB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 281.41 ms. Allocated memory is still 212.9 MB. Free memory was 189.7 MB in the beginning and 176.5 MB in the end (delta: 13.2 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 734133.05 ms. Allocated memory was 212.9 MB in the beginning and 2.5 GB in the end (delta: 2.3 GB). Free memory was 176.0 MB in the beginning and 1.2 GB in the end (delta: -1.0 GB). Peak memory consumption was 1.2 GB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: Independence relation benchmarks ThreadSeparatingIndependenceRelation.Independence Queries: [ total: 247, positive: 220, positive conditional: 220, positive unconditional: 0, negative: 27, negative conditional: 27, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 220, positive: 220, positive conditional: 0, positive unconditional: 220, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 72, positive: 72, positive conditional: 0, positive unconditional: 72, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 72, positive: 72, positive conditional: 0, positive unconditional: 72, 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: 220, positive: 148, positive conditional: 0, positive unconditional: 148, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 72, unknown conditional: 0, unknown unconditional: 72] , Statistics on independence cache: Total cache size (in pairs): 72, Positive cache size: 72, Positive conditional cache size: 0, Positive unconditional cache size: 72, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0, Independence queries for same thread: 27 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - TimeoutResultAtElement [Line: 66]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (8983states) and FLOYD_HOARE automaton (currently 23 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 160 for 238ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8983states) and FLOYD_HOARE automaton (currently 23 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 160 for 238ms.. - TimeoutResultAtElement [Line: 59]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8983states) and FLOYD_HOARE automaton (currently 23 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 160 for 238ms.. - TimeoutResultAtElement [Line: 60]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (8983states) and FLOYD_HOARE automaton (currently 23 states, 23 states before enhancement),while PredicateUnifier was unifying predicates,while SimplifyDDAWithTimeout was simplifying term of DAG size 160 for 238ms.. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 42 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 734014.9ms, OverallIterations: 114, TraceHistogramMax: 3, EmptinessCheckTime: 412.6ms, AutomataDifference: 167674.7ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 89.0ms, PartialOrderReductionTime: 76.7ms, HoareTripleCheckerStatistics: 2836 SDtfs, 17894 SDslu, 20062 SDs, 0 SdLazy, 43866 SolverSat, 3620 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 25186.4ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 6229 GetRequests, 2340 SyntacticMatches, 123 SemanticMatches, 3765 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43874 ImplicationChecksByTransitivity, 164918.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=9896occurred in iteration=96, InterpolantAutomatonStates: 2988, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 4319.4ms AutomataMinimizationTime, 113 MinimizatonAttempts, 65413 StatesRemovedByMinimization, 113 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 376.7ms SsaConstructionTime, 1877.5ms SatisfiabilityAnalysisTime, 206165.8ms InterpolantComputationTime, 6082 NumberOfCodeBlocks, 6082 NumberOfCodeBlocksAsserted, 371 NumberOfCheckSat, 5857 ConstructedInterpolants, 134 QuantifiedInterpolants, 155402 SizeOfPredicates, 543 NumberOfNonLiveVariables, 7863 ConjunctsInSsa, 1932 ConjunctsInUnsatCore, 225 InterpolantComputations, 3 PerfectInterpolantSequences, 395/1952 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