/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/multiply-verify.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-87fd7473a0bda1db0ad7f77f2116346063730f21-87fd747 [2021-08-21 18:38:25,037 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-08-21 18:38:25,039 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-08-21 18:38:25,080 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-08-21 18:38:25,080 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-08-21 18:38:25,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-08-21 18:38:25,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-08-21 18:38:25,086 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-08-21 18:38:25,087 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-08-21 18:38:25,088 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-08-21 18:38:25,089 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-08-21 18:38:25,089 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-08-21 18:38:25,090 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-08-21 18:38:25,090 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-08-21 18:38:25,091 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-08-21 18:38:25,092 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-08-21 18:38:25,092 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-08-21 18:38:25,093 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-08-21 18:38:25,094 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-08-21 18:38:25,095 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-08-21 18:38:25,096 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-08-21 18:38:25,097 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-08-21 18:38:25,098 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-08-21 18:38:25,098 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-08-21 18:38:25,100 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... 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[2021-08-21 18:38:25,102 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-08-21 18:38:25,103 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-08-21 18:38:25,103 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-08-21 18:38:25,104 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-08-21 18:38:25,105 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-08-21 18:38:25,105 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-08-21 18:38:25,105 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-08-21 18:38:25,105 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-08-21 18:38:25,106 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-08-21 18:38:25,106 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-08-21 18:38:25,107 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-08-21 18:38:25,110 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 18:38:25,126 INFO L113 SettingsManager]: Loading preferences was successful [2021-08-21 18:38:25,126 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-08-21 18:38:25,127 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-08-21 18:38:25,127 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-08-21 18:38:25,127 INFO L138 SettingsManager]: * Use SBE=true [2021-08-21 18:38:25,128 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-08-21 18:38:25,128 INFO L138 SettingsManager]: * sizeof long=4 [2021-08-21 18:38:25,128 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-08-21 18:38:25,128 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-08-21 18:38:25,128 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-08-21 18:38:25,128 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-08-21 18:38:25,128 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-08-21 18:38:25,128 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-08-21 18:38:25,129 INFO L138 SettingsManager]: * sizeof long double=12 [2021-08-21 18:38:25,129 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-08-21 18:38:25,129 INFO L138 SettingsManager]: * Use constant arrays=true [2021-08-21 18:38:25,129 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-08-21 18:38:25,129 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-08-21 18:38:25,129 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-08-21 18:38:25,129 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-08-21 18:38:25,130 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-08-21 18:38:25,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:38:25,130 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-08-21 18:38:25,130 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-08-21 18:38:25,130 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-08-21 18:38:25,130 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-08-21 18:38:25,130 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-08-21 18:38:25,131 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-08-21 18:38:25,131 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-08-21 18:38:25,131 INFO L138 SettingsManager]: * Partial Order Reduction in concurrent analysis=SLEEP_DELAY_SET [2021-08-21 18:38:25,131 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-08-21 18:38:25,377 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-08-21 18:38:25,393 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-08-21 18:38:25,394 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-08-21 18:38:25,395 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-08-21 18:38:25,396 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-08-21 18:38:25,400 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl [2021-08-21 18:38:25,400 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/popl20-more/multiply-verify.wvr.bpl' [2021-08-21 18:38:25,421 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-08-21 18:38:25,422 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-08-21 18:38:25,423 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-08-21 18:38:25,423 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-08-21 18:38:25,423 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-08-21 18:38:25,431 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:38:25" (1/1) ... [2021-08-21 18:38:25,437 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:38:25" (1/1) ... [2021-08-21 18:38:25,442 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-08-21 18:38:25,445 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-08-21 18:38:25,445 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-08-21 18:38:25,445 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-08-21 18:38:25,451 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:38:25" (1/1) ... [2021-08-21 18:38:25,451 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:38:25" (1/1) ... [2021-08-21 18:38:25,452 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:38:25" (1/1) ... [2021-08-21 18:38:25,453 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:38:25" (1/1) ... [2021-08-21 18:38:25,457 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:38:25" (1/1) ... [2021-08-21 18:38:25,461 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:38:25" (1/1) ... [2021-08-21 18:38:25,461 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:38:25" (1/1) ... [2021-08-21 18:38:25,462 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-08-21 18:38:25,463 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-08-21 18:38:25,463 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-08-21 18:38:25,463 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-08-21 18:38:25,473 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:38:25" (1/1) ... [2021-08-21 18:38:25,477 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-08-21 18:38:25,483 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:25,498 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 18:38:25,504 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 18:38:25,529 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-08-21 18:38:25,529 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-08-21 18:38:25,529 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-08-21 18:38:25,529 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-08-21 18:38:25,529 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-08-21 18:38:25,529 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-08-21 18:38:25,530 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-08-21 18:38:25,530 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-08-21 18:38:25,530 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-08-21 18:38:25,530 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-08-21 18:38:25,530 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-08-21 18:38:25,530 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-08-21 18:38:25,531 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 18:38:25,724 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-08-21 18:38:25,724 INFO L299 CfgBuilder]: Removed 0 assume(true) statements. [2021-08-21 18:38:25,725 INFO L202 PluginConnector]: Adding new model multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:38:25 BoogieIcfgContainer [2021-08-21 18:38:25,726 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-08-21 18:38:25,727 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-08-21 18:38:25,727 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-08-21 18:38:25,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-08-21 18:38:25,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 21.08 06:38:25" (1/2) ... [2021-08-21 18:38:25,729 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7bdc0e9c and model type multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.08 06:38:25, skipping insertion in model container [2021-08-21 18:38:25,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.08 06:38:25" (2/2) ... [2021-08-21 18:38:25,730 INFO L111 eAbstractionObserver]: Analyzing ICFG multiply-verify.wvr.bpl [2021-08-21 18:38:25,733 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-08-21 18:38:25,733 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-08-21 18:38:25,734 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-08-21 18:38:25,734 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-08-21 18:38:25,771 INFO L148 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2021-08-21 18:38:25,814 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-08-21 18:38:25,818 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 18:38:25,818 INFO L340 AbstractCegarLoop]: Starting to check reachability of 4 error locations. [2021-08-21 18:38:25,995 INFO L276 IsEmpty]: Start isEmpty. Operand has 369 states, 272 states have (on average 1.5551470588235294) internal successors, (423), 368 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:26,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:38:26,009 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:26,010 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 18:38:26,010 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:26,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:26,014 INFO L82 PathProgramCache]: Analyzing trace with hash -271793270, now seen corresponding path program 1 times [2021-08-21 18:38:26,019 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:26,020 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1563813053] [2021-08-21 18:38:26,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:26,021 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:26,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:26,153 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 18:38:26,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:26,154 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1563813053] [2021-08-21 18:38:26,154 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1563813053] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:38:26,154 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:38:26,154 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-08-21 18:38:26,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1074142016] [2021-08-21 18:38:26,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-08-21 18:38:26,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:26,165 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-08-21 18:38:26,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:38:26,167 INFO L87 Difference]: Start difference. First operand has 369 states, 272 states have (on average 1.5551470588235294) internal successors, (423), 368 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:26,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:26,191 INFO L93 Difference]: Finished difference Result 171 states and 197 transitions. [2021-08-21 18:38:26,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-08-21 18:38:26,192 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 18:38:26,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:26,196 INFO L225 Difference]: With dead ends: 171 [2021-08-21 18:38:26,196 INFO L226 Difference]: Without dead ends: 43 [2021-08-21 18:38:26,197 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 9.0ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-08-21 18:38:26,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-08-21 18:38:26,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-08-21 18:38:26,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.2380952380952381) internal successors, (52), 42 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:26,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2021-08-21 18:38:26,217 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 22 [2021-08-21 18:38:26,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:26,217 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2021-08-21 18:38:26,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 5.5) internal successors, (22), 3 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:26,217 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2021-08-21 18:38:26,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:38:26,218 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:26,218 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 18:38:26,218 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-08-21 18:38:26,218 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:26,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:26,219 INFO L82 PathProgramCache]: Analyzing trace with hash -1987765268, now seen corresponding path program 2 times [2021-08-21 18:38:26,219 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:26,219 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900783773] [2021-08-21 18:38:26,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:26,219 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:26,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:26,410 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 18:38:26,411 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:26,411 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900783773] [2021-08-21 18:38:26,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900783773] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:38:26,412 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:38:26,412 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 18:38:26,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194428458] [2021-08-21 18:38:26,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:38:26,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:26,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:38:26,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:38:26,416 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:26,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:26,497 INFO L93 Difference]: Finished difference Result 68 states and 84 transitions. [2021-08-21 18:38:26,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:38:26,498 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 18:38:26,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:26,498 INFO L225 Difference]: With dead ends: 68 [2021-08-21 18:38:26,499 INFO L226 Difference]: Without dead ends: 53 [2021-08-21 18:38:26,499 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 58.3ms TimeCoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:38:26,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-08-21 18:38:26,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 47. [2021-08-21 18:38:26,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 46 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:26,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 58 transitions. [2021-08-21 18:38:26,503 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 58 transitions. Word has length 22 [2021-08-21 18:38:26,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:26,503 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 58 transitions. [2021-08-21 18:38:26,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:26,503 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 58 transitions. [2021-08-21 18:38:26,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-08-21 18:38:26,504 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:26,504 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 18:38:26,504 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-08-21 18:38:26,504 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:26,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:26,504 INFO L82 PathProgramCache]: Analyzing trace with hash 1423004114, now seen corresponding path program 3 times [2021-08-21 18:38:26,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:26,504 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1222339251] [2021-08-21 18:38:26,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:26,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:26,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:26,608 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 18:38:26,608 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:26,608 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1222339251] [2021-08-21 18:38:26,609 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1222339251] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:38:26,609 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:38:26,609 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2021-08-21 18:38:26,609 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593781610] [2021-08-21 18:38:26,609 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-08-21 18:38:26,609 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:26,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-08-21 18:38:26,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=42, Unknown=0, NotChecked=0, Total=56 [2021-08-21 18:38:26,610 INFO L87 Difference]: Start difference. First operand 47 states and 58 transitions. Second operand has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:26,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:26,667 INFO L93 Difference]: Finished difference Result 83 states and 103 transitions. [2021-08-21 18:38:26,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:38:26,667 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-08-21 18:38:26,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:26,669 INFO L225 Difference]: With dead ends: 83 [2021-08-21 18:38:26,669 INFO L226 Difference]: Without dead ends: 68 [2021-08-21 18:38:26,672 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 43.8ms TimeCoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:38:26,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-08-21 18:38:26,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 53. [2021-08-21 18:38:26,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.25) internal successors, (65), 52 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:26,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 65 transitions. [2021-08-21 18:38:26,685 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 65 transitions. Word has length 22 [2021-08-21 18:38:26,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:26,685 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 65 transitions. [2021-08-21 18:38:26,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.75) internal successors, (22), 7 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:26,686 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 65 transitions. [2021-08-21 18:38:26,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 18:38:26,687 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:26,687 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:26,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-08-21 18:38:26,687 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:26,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:26,688 INFO L82 PathProgramCache]: Analyzing trace with hash -25651578, now seen corresponding path program 1 times [2021-08-21 18:38:26,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:26,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454374952] [2021-08-21 18:38:26,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:26,689 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:26,697 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:26,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:26,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:26,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454374952] [2021-08-21 18:38:26,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454374952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:26,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047486708] [2021-08-21 18:38:26,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:26,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:26,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:26,737 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 18:38:26,740 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 18:38:26,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:26,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjunts are in the unsatisfiable core [2021-08-21 18:38:26,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:26,920 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:26,921 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047486708] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:26,921 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:26,921 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-08-21 18:38:26,921 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799975171] [2021-08-21 18:38:26,921 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-08-21 18:38:26,921 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:26,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-08-21 18:38:26,922 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-08-21 18:38:26,922 INFO L87 Difference]: Start difference. First operand 53 states and 65 transitions. Second operand has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:26,971 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:26,971 INFO L93 Difference]: Finished difference Result 90 states and 108 transitions. [2021-08-21 18:38:26,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-08-21 18:38:26,972 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 18:38:26,972 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:26,972 INFO L225 Difference]: With dead ends: 90 [2021-08-21 18:38:26,972 INFO L226 Difference]: Without dead ends: 90 [2021-08-21 18:38:26,973 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 46.8ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-08-21 18:38:26,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-08-21 18:38:26,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 46. [2021-08-21 18:38:26,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.2222222222222223) internal successors, (55), 45 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:26,975 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 55 transitions. [2021-08-21 18:38:26,975 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 55 transitions. Word has length 25 [2021-08-21 18:38:26,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:26,975 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 55 transitions. [2021-08-21 18:38:26,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 4.5) internal successors, (27), 6 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:26,975 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 55 transitions. [2021-08-21 18:38:26,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-08-21 18:38:26,976 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:26,976 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:27,000 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 18:38:27,180 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 18:38:27,181 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:27,181 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:27,181 INFO L82 PathProgramCache]: Analyzing trace with hash -869808898, now seen corresponding path program 1 times [2021-08-21 18:38:27,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:27,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005169940] [2021-08-21 18:38:27,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:27,182 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:27,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:27,211 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:27,212 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:27,212 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005169940] [2021-08-21 18:38:27,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005169940] provided 1 perfect and 0 imperfect interpolant sequences [2021-08-21 18:38:27,212 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-08-21 18:38:27,212 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-08-21 18:38:27,212 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372552767] [2021-08-21 18:38:27,213 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-08-21 18:38:27,213 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:27,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-08-21 18:38:27,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-08-21 18:38:27,213 INFO L87 Difference]: Start difference. First operand 46 states and 55 transitions. Second operand has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:27,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:27,236 INFO L93 Difference]: Finished difference Result 58 states and 67 transitions. [2021-08-21 18:38:27,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-08-21 18:38:27,236 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-08-21 18:38:27,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:27,236 INFO L225 Difference]: With dead ends: 58 [2021-08-21 18:38:27,236 INFO L226 Difference]: Without dead ends: 49 [2021-08-21 18:38:27,237 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 17.7ms TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2021-08-21 18:38:27,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-08-21 18:38:27,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2021-08-21 18:38:27,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 46 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 18:38:27,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 56 transitions. [2021-08-21 18:38:27,239 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 56 transitions. Word has length 25 [2021-08-21 18:38:27,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:27,239 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 56 transitions. [2021-08-21 18:38:27,239 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:27,239 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 56 transitions. [2021-08-21 18:38:27,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:27,239 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:27,239 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:27,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-08-21 18:38:27,240 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:27,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:27,240 INFO L82 PathProgramCache]: Analyzing trace with hash -2045768668, now seen corresponding path program 1 times [2021-08-21 18:38:27,240 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:27,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336893686] [2021-08-21 18:38:27,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:27,240 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:27,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:27,417 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 18:38:27,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:27,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336893686] [2021-08-21 18:38:27,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336893686] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:27,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053849399] [2021-08-21 18:38:27,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:27,419 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:27,419 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:27,420 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 18:38:27,421 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 18:38:27,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:27,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:38:27,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:27,758 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 18:38:27,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053849399] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:27,767 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:27,767 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 18:38:27,768 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070281638] [2021-08-21 18:38:27,768 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:38:27,768 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:27,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:38:27,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:38:27,772 INFO L87 Difference]: Start difference. First operand 47 states and 56 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:27,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:27,846 INFO L93 Difference]: Finished difference Result 77 states and 93 transitions. [2021-08-21 18:38:27,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:38:27,846 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:38:27,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:27,849 INFO L225 Difference]: With dead ends: 77 [2021-08-21 18:38:27,849 INFO L226 Difference]: Without dead ends: 62 [2021-08-21 18:38:27,849 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 4 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 115.9ms TimeCoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:38:27,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-08-21 18:38:27,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 55. [2021-08-21 18:38:27,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.2222222222222223) internal successors, (66), 54 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:27,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2021-08-21 18:38:27,854 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 28 [2021-08-21 18:38:27,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:27,854 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2021-08-21 18:38:27,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:27,854 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2021-08-21 18:38:27,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-08-21 18:38:27,854 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:27,854 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:27,874 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 18:38:28,055 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-08-21 18:38:28,055 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:28,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:28,056 INFO L82 PathProgramCache]: Analyzing trace with hash -235429644, now seen corresponding path program 2 times [2021-08-21 18:38:28,056 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:28,056 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714977701] [2021-08-21 18:38:28,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:28,056 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:28,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:28,224 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 18:38:28,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:28,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714977701] [2021-08-21 18:38:28,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714977701] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:28,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1369138241] [2021-08-21 18:38:28,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:38:28,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:28,225 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:28,231 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 18:38:28,232 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 18:38:28,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:38:28,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:28,297 INFO L263 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:38:28,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:28,573 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 18:38:28,573 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1369138241] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:28,573 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:28,573 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-08-21 18:38:28,573 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398688685] [2021-08-21 18:38:28,573 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-08-21 18:38:28,574 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:28,574 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-08-21 18:38:28,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2021-08-21 18:38:28,574 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:28,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:28,653 INFO L93 Difference]: Finished difference Result 98 states and 118 transitions. [2021-08-21 18:38:28,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:38:28,653 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-08-21 18:38:28,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:28,654 INFO L225 Difference]: With dead ends: 98 [2021-08-21 18:38:28,654 INFO L226 Difference]: Without dead ends: 83 [2021-08-21 18:38:28,654 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 24 SyntacticMatches, 3 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=31, Invalid=125, Unknown=0, NotChecked=0, Total=156 [2021-08-21 18:38:28,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-08-21 18:38:28,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 65. [2021-08-21 18:38:28,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.203125) internal successors, (77), 64 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:28,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 77 transitions. [2021-08-21 18:38:28,657 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 77 transitions. Word has length 28 [2021-08-21 18:38:28,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:28,657 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 77 transitions. [2021-08-21 18:38:28,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:28,657 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 77 transitions. [2021-08-21 18:38:28,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:38:28,657 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:28,657 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:28,676 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 18:38:28,872 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:28,873 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:28,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:28,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1015043266, now seen corresponding path program 3 times [2021-08-21 18:38:28,873 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:28,873 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679483725] [2021-08-21 18:38:28,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:28,874 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:28,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:28,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:28,914 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:28,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679483725] [2021-08-21 18:38:28,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [679483725] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:28,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1754641319] [2021-08-21 18:38:28,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:38:28,914 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:28,914 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:28,916 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 18:38:28,916 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 18:38:29,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-08-21 18:38:29,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:29,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:38:29,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:29,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:29,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1754641319] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:29,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:29,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 18:38:29,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518516691] [2021-08-21 18:38:29,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:38:29,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:29,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:38:29,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:38:29,107 INFO L87 Difference]: Start difference. First operand 65 states and 77 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:29,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:29,187 INFO L93 Difference]: Finished difference Result 111 states and 129 transitions. [2021-08-21 18:38:29,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-08-21 18:38:29,188 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:38:29,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:29,188 INFO L225 Difference]: With dead ends: 111 [2021-08-21 18:38:29,188 INFO L226 Difference]: Without dead ends: 111 [2021-08-21 18:38:29,189 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=64, Invalid=118, Unknown=0, NotChecked=0, Total=182 [2021-08-21 18:38:29,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-08-21 18:38:29,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 56. [2021-08-21 18:38:29,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.1818181818181819) internal successors, (65), 55 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:29,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 65 transitions. [2021-08-21 18:38:29,203 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 65 transitions. Word has length 31 [2021-08-21 18:38:29,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:29,203 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 65 transitions. [2021-08-21 18:38:29,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:29,203 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 65 transitions. [2021-08-21 18:38:29,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-08-21 18:38:29,203 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:29,203 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:29,222 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-08-21 18:38:29,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:29,404 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:29,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:29,404 INFO L82 PathProgramCache]: Analyzing trace with hash 2022721990, now seen corresponding path program 4 times [2021-08-21 18:38:29,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:29,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2014708139] [2021-08-21 18:38:29,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:29,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:29,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:29,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:29,451 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:29,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2014708139] [2021-08-21 18:38:29,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2014708139] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:29,451 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987323912] [2021-08-21 18:38:29,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:38:29,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:29,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:29,452 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 18:38:29,476 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 18:38:29,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:38:29,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:29,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 6 conjunts are in the unsatisfiable core [2021-08-21 18:38:29,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:29,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:29,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987323912] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:29,657 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:29,657 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-08-21 18:38:29,657 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [11432506] [2021-08-21 18:38:29,657 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-08-21 18:38:29,657 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:29,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-08-21 18:38:29,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2021-08-21 18:38:29,658 INFO L87 Difference]: Start difference. First operand 56 states and 65 transitions. Second operand has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:29,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:29,698 INFO L93 Difference]: Finished difference Result 79 states and 88 transitions. [2021-08-21 18:38:29,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-08-21 18:38:29,699 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-08-21 18:38:29,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:29,700 INFO L225 Difference]: With dead ends: 79 [2021-08-21 18:38:29,700 INFO L226 Difference]: Without dead ends: 61 [2021-08-21 18:38:29,700 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 54.3ms TimeCoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:38:29,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-08-21 18:38:29,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 59. [2021-08-21 18:38:29,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.1724137931034482) internal successors, (68), 58 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:29,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 68 transitions. [2021-08-21 18:38:29,702 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 68 transitions. Word has length 31 [2021-08-21 18:38:29,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:29,702 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 68 transitions. [2021-08-21 18:38:29,702 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 4.0) internal successors, (36), 9 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:29,702 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 68 transitions. [2021-08-21 18:38:29,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 18:38:29,702 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:29,702 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:29,719 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 18:38:29,916 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:29,917 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:29,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:29,917 INFO L82 PathProgramCache]: Analyzing trace with hash -652993428, now seen corresponding path program 5 times [2021-08-21 18:38:29,917 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:29,917 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329722211] [2021-08-21 18:38:29,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:29,918 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:29,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:30,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:30,071 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:30,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329722211] [2021-08-21 18:38:30,071 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329722211] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:30,071 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236064131] [2021-08-21 18:38:30,071 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:38:30,071 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:30,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:30,077 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 18:38:30,078 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 18:38:30,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-08-21 18:38:30,210 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:30,211 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 18:38:30,212 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:30,673 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:38:30,674 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 33 [2021-08-21 18:38:30,704 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:30,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236064131] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:30,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:30,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 16 [2021-08-21 18:38:30,706 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [538814974] [2021-08-21 18:38:30,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-08-21 18:38:30,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:30,707 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-08-21 18:38:30,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-08-21 18:38:30,707 INFO L87 Difference]: Start difference. First operand 59 states and 68 transitions. Second operand has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:30,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:30,785 INFO L93 Difference]: Finished difference Result 112 states and 131 transitions. [2021-08-21 18:38:30,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:38:30,786 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 18:38:30,786 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:30,786 INFO L225 Difference]: With dead ends: 112 [2021-08-21 18:38:30,786 INFO L226 Difference]: Without dead ends: 97 [2021-08-21 18:38:30,787 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 173.6ms TimeCoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:38:30,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-21 18:38:30,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 67. [2021-08-21 18:38:30,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.1818181818181819) internal successors, (78), 66 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:30,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 78 transitions. [2021-08-21 18:38:30,793 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 78 transitions. Word has length 34 [2021-08-21 18:38:30,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:30,794 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 78 transitions. [2021-08-21 18:38:30,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.8823529411764706) internal successors, (49), 16 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:30,794 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 78 transitions. [2021-08-21 18:38:30,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-08-21 18:38:30,795 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:30,795 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:30,813 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 18:38:31,008 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:31,009 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:31,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:31,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1168503314, now seen corresponding path program 6 times [2021-08-21 18:38:31,009 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:31,009 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613925946] [2021-08-21 18:38:31,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:31,010 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:31,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:31,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:31,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613925946] [2021-08-21 18:38:31,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [613925946] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:31,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699696614] [2021-08-21 18:38:31,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:38:31,194 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:31,195 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:31,195 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 18:38:31,220 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 18:38:31,349 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-08-21 18:38:31,349 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:31,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 18:38:31,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:31,747 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 18:38:31,747 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 37 [2021-08-21 18:38:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:31,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699696614] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:31,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:31,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 18:38:31,769 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261298456] [2021-08-21 18:38:31,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-08-21 18:38:31,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:31,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-08-21 18:38:31,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:38:31,771 INFO L87 Difference]: Start difference. First operand 67 states and 78 transitions. Second operand has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:31,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:31,884 INFO L93 Difference]: Finished difference Result 119 states and 139 transitions. [2021-08-21 18:38:31,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:38:31,884 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-08-21 18:38:31,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:31,885 INFO L225 Difference]: With dead ends: 119 [2021-08-21 18:38:31,885 INFO L226 Difference]: Without dead ends: 104 [2021-08-21 18:38:31,885 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 159.2ms TimeCoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:38:31,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-08-21 18:38:31,886 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 77. [2021-08-21 18:38:31,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.1710526315789473) internal successors, (89), 76 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:31,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 89 transitions. [2021-08-21 18:38:31,887 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 89 transitions. Word has length 34 [2021-08-21 18:38:31,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:31,887 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 89 transitions. [2021-08-21 18:38:31,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.0) internal successors, (48), 15 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:31,887 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 89 transitions. [2021-08-21 18:38:31,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:38:31,888 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:31,888 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:31,908 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 18:38:32,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:32,106 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:32,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:32,106 INFO L82 PathProgramCache]: Analyzing trace with hash 1702002694, now seen corresponding path program 7 times [2021-08-21 18:38:32,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:32,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790469750] [2021-08-21 18:38:32,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:32,106 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:32,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:32,163 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:32,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:32,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790469750] [2021-08-21 18:38:32,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790469750] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:32,164 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897480013] [2021-08-21 18:38:32,164 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:38:32,164 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:32,164 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:32,165 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 18:38:32,190 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 18:38:32,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:32,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:38:32,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:32,496 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:32,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897480013] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:32,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:32,497 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 18:38:32,497 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27304947] [2021-08-21 18:38:32,497 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:38:32,497 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:32,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:38:32,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:38:32,501 INFO L87 Difference]: Start difference. First operand 77 states and 89 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:32,591 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:32,591 INFO L93 Difference]: Finished difference Result 132 states and 150 transitions. [2021-08-21 18:38:32,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-08-21 18:38:32,591 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:38:32,592 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:32,592 INFO L225 Difference]: With dead ends: 132 [2021-08-21 18:38:32,593 INFO L226 Difference]: Without dead ends: 132 [2021-08-21 18:38:32,593 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 34 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 98.7ms TimeCoverageRelationStatistics Valid=102, Invalid=204, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:38:32,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-08-21 18:38:32,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 68. [2021-08-21 18:38:32,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.1492537313432836) internal successors, (77), 67 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:32,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 77 transitions. [2021-08-21 18:38:32,595 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 77 transitions. Word has length 37 [2021-08-21 18:38:32,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:32,595 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 77 transitions. [2021-08-21 18:38:32,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:32,595 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 77 transitions. [2021-08-21 18:38:32,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-08-21 18:38:32,596 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:32,596 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:32,612 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 18:38:32,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-08-21 18:38:32,797 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:32,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:32,797 INFO L82 PathProgramCache]: Analyzing trace with hash 510850174, now seen corresponding path program 8 times [2021-08-21 18:38:32,797 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:32,797 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315147389] [2021-08-21 18:38:32,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:32,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:32,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:32,862 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:32,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:32,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315147389] [2021-08-21 18:38:32,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315147389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:32,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [560325629] [2021-08-21 18:38:32,863 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:38:32,863 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:32,863 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:32,864 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 18:38:32,865 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 18:38:33,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:38:33,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:33,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2021-08-21 18:38:33,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:33,198 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 12 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:33,199 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [560325629] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:33,199 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:33,199 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-08-21 18:38:33,199 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936224885] [2021-08-21 18:38:33,199 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-08-21 18:38:33,199 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:33,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-08-21 18:38:33,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=93, Unknown=0, NotChecked=0, Total=132 [2021-08-21 18:38:33,200 INFO L87 Difference]: Start difference. First operand 68 states and 77 transitions. Second operand has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:33,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:33,250 INFO L93 Difference]: Finished difference Result 100 states and 109 transitions. [2021-08-21 18:38:33,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-08-21 18:38:33,250 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-08-21 18:38:33,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:33,251 INFO L225 Difference]: With dead ends: 100 [2021-08-21 18:38:33,251 INFO L226 Difference]: Without dead ends: 73 [2021-08-21 18:38:33,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 64.5ms TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2021-08-21 18:38:33,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-08-21 18:38:33,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 71. [2021-08-21 18:38:33,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.1428571428571428) internal successors, (80), 70 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 18:38:33,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 80 transitions. [2021-08-21 18:38:33,252 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 80 transitions. Word has length 37 [2021-08-21 18:38:33,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:33,253 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 80 transitions. [2021-08-21 18:38:33,253 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.75) internal successors, (45), 12 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:33,253 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 80 transitions. [2021-08-21 18:38:33,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 18:38:33,254 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:33,254 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:33,271 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 18:38:33,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-08-21 18:38:33,463 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:33,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:33,464 INFO L82 PathProgramCache]: Analyzing trace with hash -90459484, now seen corresponding path program 9 times [2021-08-21 18:38:33,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:33,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206889055] [2021-08-21 18:38:33,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:33,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:33,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:33,661 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:33,662 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:33,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206889055] [2021-08-21 18:38:33,662 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1206889055] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:33,662 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845642362] [2021-08-21 18:38:33,662 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:38:33,662 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:33,662 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:33,665 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 18:38:33,698 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 18:38:33,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-08-21 18:38:33,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:33,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:38:33,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:34,418 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:38:34,418 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 33 [2021-08-21 18:38:34,458 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:34,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [845642362] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:34,459 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:34,459 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 19 [2021-08-21 18:38:34,459 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102019101] [2021-08-21 18:38:34,459 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-08-21 18:38:34,459 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:34,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-08-21 18:38:34,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:38:34,460 INFO L87 Difference]: Start difference. First operand 71 states and 80 transitions. Second operand has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:34,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:34,609 INFO L93 Difference]: Finished difference Result 133 states and 152 transitions. [2021-08-21 18:38:34,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:38:34,610 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-21 18:38:34,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:34,611 INFO L225 Difference]: With dead ends: 133 [2021-08-21 18:38:34,611 INFO L226 Difference]: Without dead ends: 118 [2021-08-21 18:38:34,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 244.8ms TimeCoverageRelationStatistics Valid=69, Invalid=393, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:38:34,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-08-21 18:38:34,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 79. [2021-08-21 18:38:34,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.1538461538461537) internal successors, (90), 78 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:34,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 90 transitions. [2021-08-21 18:38:34,616 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 90 transitions. Word has length 40 [2021-08-21 18:38:34,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:34,616 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 90 transitions. [2021-08-21 18:38:34,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.9) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:34,616 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 90 transitions. [2021-08-21 18:38:34,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-08-21 18:38:34,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:34,616 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:34,635 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 18:38:34,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-08-21 18:38:34,833 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:34,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:34,833 INFO L82 PathProgramCache]: Analyzing trace with hash -876834892, now seen corresponding path program 10 times [2021-08-21 18:38:34,833 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:34,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386396889] [2021-08-21 18:38:34,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:34,834 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:34,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:35,074 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:35,074 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:35,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386396889] [2021-08-21 18:38:35,074 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1386396889] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:35,074 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109350389] [2021-08-21 18:38:35,074 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:38:35,074 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:35,074 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:35,089 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 18:38:35,089 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 18:38:35,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:38:35,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:35,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:38:35,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:35,811 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 18:38:35,811 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 37 [2021-08-21 18:38:35,829 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:35,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109350389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:35,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:35,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-08-21 18:38:35,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638885938] [2021-08-21 18:38:35,830 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-08-21 18:38:35,830 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:35,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-08-21 18:38:35,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=295, Unknown=0, NotChecked=0, Total=342 [2021-08-21 18:38:35,830 INFO L87 Difference]: Start difference. First operand 79 states and 90 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:35,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:35,986 INFO L93 Difference]: Finished difference Result 140 states and 160 transitions. [2021-08-21 18:38:35,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:38:35,986 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-08-21 18:38:35,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:35,987 INFO L225 Difference]: With dead ends: 140 [2021-08-21 18:38:35,987 INFO L226 Difference]: Without dead ends: 125 [2021-08-21 18:38:35,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 33 SyntacticMatches, 2 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 213.8ms TimeCoverageRelationStatistics Valid=57, Invalid=363, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:38:35,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-08-21 18:38:35,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 89. [2021-08-21 18:38:35,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.1477272727272727) internal successors, (101), 88 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:35,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 101 transitions. [2021-08-21 18:38:35,989 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 101 transitions. Word has length 40 [2021-08-21 18:38:35,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:35,989 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 101 transitions. [2021-08-21 18:38:35,989 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:35,989 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 101 transitions. [2021-08-21 18:38:35,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:38:35,989 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:35,990 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:36,009 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 18:38:36,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-08-21 18:38:36,207 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:36,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:36,207 INFO L82 PathProgramCache]: Analyzing trace with hash 602110654, now seen corresponding path program 11 times [2021-08-21 18:38:36,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:36,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993267949] [2021-08-21 18:38:36,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:36,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:36,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:36,275 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:36,276 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:36,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993267949] [2021-08-21 18:38:36,276 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993267949] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:36,276 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557474871] [2021-08-21 18:38:36,276 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:38:36,276 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:36,276 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:36,277 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 18:38:36,278 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 18:38:36,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-08-21 18:38:36,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:36,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 18:38:36,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:36,743 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:36,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557474871] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:36,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:36,744 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 18:38:36,744 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305549425] [2021-08-21 18:38:36,744 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:38:36,744 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:36,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:38:36,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:38:36,745 INFO L87 Difference]: Start difference. First operand 89 states and 101 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:36,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:36,863 INFO L93 Difference]: Finished difference Result 153 states and 171 transitions. [2021-08-21 18:38:36,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-08-21 18:38:36,866 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:38:36,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:36,866 INFO L225 Difference]: With dead ends: 153 [2021-08-21 18:38:36,867 INFO L226 Difference]: Without dead ends: 153 [2021-08-21 18:38:36,867 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 114.5ms TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2021-08-21 18:38:36,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-08-21 18:38:36,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 80. [2021-08-21 18:38:36,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.1265822784810127) internal successors, (89), 79 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:36,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 89 transitions. [2021-08-21 18:38:36,869 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 89 transitions. Word has length 43 [2021-08-21 18:38:36,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:36,869 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 89 transitions. [2021-08-21 18:38:36,869 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:36,869 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 89 transitions. [2021-08-21 18:38:36,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-08-21 18:38:36,869 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:36,869 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-08-21 18:38:36,886 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 18:38:37,079 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-08-21 18:38:37,080 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:37,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:37,080 INFO L82 PathProgramCache]: Analyzing trace with hash -2813114, now seen corresponding path program 12 times [2021-08-21 18:38:37,080 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:37,080 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357910458] [2021-08-21 18:38:37,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:37,080 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:37,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:37,139 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:37,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:37,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357910458] [2021-08-21 18:38:37,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [357910458] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:37,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2036617485] [2021-08-21 18:38:37,140 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:38:37,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:37,140 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:37,150 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 18:38:37,151 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 18:38:37,446 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-08-21 18:38:37,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:37,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2021-08-21 18:38:37,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:37,652 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 22 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:37,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2036617485] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:37,653 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:37,653 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 15 [2021-08-21 18:38:37,653 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1339664736] [2021-08-21 18:38:37,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-08-21 18:38:37,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:37,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-08-21 18:38:37,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2021-08-21 18:38:37,654 INFO L87 Difference]: Start difference. First operand 80 states and 89 transitions. Second operand has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:37,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:37,729 INFO L93 Difference]: Finished difference Result 121 states and 130 transitions. [2021-08-21 18:38:37,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-08-21 18:38:37,729 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-08-21 18:38:37,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:37,729 INFO L225 Difference]: With dead ends: 121 [2021-08-21 18:38:37,729 INFO L226 Difference]: Without dead ends: 85 [2021-08-21 18:38:37,730 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 103.6ms TimeCoverageRelationStatistics Valid=109, Invalid=271, Unknown=0, NotChecked=0, Total=380 [2021-08-21 18:38:37,730 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-08-21 18:38:37,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 83. [2021-08-21 18:38:37,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.1219512195121952) internal successors, (92), 82 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:37,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 92 transitions. [2021-08-21 18:38:37,732 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 92 transitions. Word has length 43 [2021-08-21 18:38:37,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:37,732 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 92 transitions. [2021-08-21 18:38:37,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.6) internal successors, (54), 15 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:37,732 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 92 transitions. [2021-08-21 18:38:37,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 18:38:37,732 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:37,732 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 18:38:37,752 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 18:38:37,948 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-08-21 18:38:37,949 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:37,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:37,949 INFO L82 PathProgramCache]: Analyzing trace with hash -668721940, now seen corresponding path program 13 times [2021-08-21 18:38:37,949 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:37,949 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099212611] [2021-08-21 18:38:37,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:37,949 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:37,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:38,180 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:38,180 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:38,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099212611] [2021-08-21 18:38:38,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099212611] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:38,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365871557] [2021-08-21 18:38:38,180 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:38:38,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:38,181 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:38,187 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 18:38:38,188 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 18:38:38,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:38,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:38:38,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:39,115 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:38:39,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 33 [2021-08-21 18:38:39,161 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:39,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365871557] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:39,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:39,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 22 [2021-08-21 18:38:39,161 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456116551] [2021-08-21 18:38:39,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-08-21 18:38:39,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:39,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-08-21 18:38:39,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=437, Unknown=0, NotChecked=0, Total=506 [2021-08-21 18:38:39,165 INFO L87 Difference]: Start difference. First operand 83 states and 92 transitions. Second operand has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:39,322 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:39,322 INFO L93 Difference]: Finished difference Result 154 states and 173 transitions. [2021-08-21 18:38:39,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:38:39,323 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-21 18:38:39,323 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:39,323 INFO L225 Difference]: With dead ends: 154 [2021-08-21 18:38:39,323 INFO L226 Difference]: Without dead ends: 139 [2021-08-21 18:38:39,323 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 299.4ms TimeCoverageRelationStatistics Valid=80, Invalid=520, Unknown=0, NotChecked=0, Total=600 [2021-08-21 18:38:39,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2021-08-21 18:38:39,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 91. [2021-08-21 18:38:39,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.1333333333333333) internal successors, (102), 90 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:39,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 102 transitions. [2021-08-21 18:38:39,325 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 102 transitions. Word has length 46 [2021-08-21 18:38:39,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:39,325 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 102 transitions. [2021-08-21 18:38:39,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.9130434782608696) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:39,326 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 102 transitions. [2021-08-21 18:38:39,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-08-21 18:38:39,326 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:39,326 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 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 18:38:39,345 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2021-08-21 18:38:39,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:39,539 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:39,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:39,539 INFO L82 PathProgramCache]: Analyzing trace with hash -910900654, now seen corresponding path program 14 times [2021-08-21 18:38:39,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:39,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613151132] [2021-08-21 18:38:39,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:39,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:39,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:39,796 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:39,796 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:39,796 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613151132] [2021-08-21 18:38:39,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613151132] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:39,797 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329861900] [2021-08-21 18:38:39,797 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:38:39,797 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:39,797 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:39,797 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 18:38:39,818 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 18:38:40,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:38:40,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:40,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:38:40,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:40,703 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:38:40,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-21 18:38:40,741 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:40,741 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329861900] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:40,741 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:40,741 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16] total 23 [2021-08-21 18:38:40,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600071897] [2021-08-21 18:38:40,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:38:40,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:40,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:38:40,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=495, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:38:40,742 INFO L87 Difference]: Start difference. First operand 91 states and 102 transitions. Second operand has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:41,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:41,131 INFO L93 Difference]: Finished difference Result 176 states and 199 transitions. [2021-08-21 18:38:41,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:38:41,132 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-08-21 18:38:41,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:41,132 INFO L225 Difference]: With dead ends: 176 [2021-08-21 18:38:41,132 INFO L226 Difference]: Without dead ends: 161 [2021-08-21 18:38:41,133 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 459.9ms TimeCoverageRelationStatistics Valid=108, Invalid=822, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:38:41,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2021-08-21 18:38:41,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 101. [2021-08-21 18:38:41,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.13) internal successors, (113), 100 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:41,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 113 transitions. [2021-08-21 18:38:41,135 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 113 transitions. Word has length 46 [2021-08-21 18:38:41,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:41,135 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 113 transitions. [2021-08-21 18:38:41,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.7916666666666665) internal successors, (67), 23 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:41,135 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 113 transitions. [2021-08-21 18:38:41,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:38:41,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:41,135 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 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 18:38:41,154 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2021-08-21 18:38:41,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:41,354 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:41,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:41,354 INFO L82 PathProgramCache]: Analyzing trace with hash -304617082, now seen corresponding path program 15 times [2021-08-21 18:38:41,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:41,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118082644] [2021-08-21 18:38:41,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:41,354 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:41,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:41,442 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:41,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:41,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118082644] [2021-08-21 18:38:41,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1118082644] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:41,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156764744] [2021-08-21 18:38:41,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:38:41,443 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:41,443 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:41,445 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 18:38:41,480 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 18:38:41,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-08-21 18:38:41,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:41,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 18:38:41,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:42,087 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 22 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:42,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156764744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:42,088 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:42,088 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-08-21 18:38:42,088 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091268426] [2021-08-21 18:38:42,088 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:38:42,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:42,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:38:42,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:38:42,089 INFO L87 Difference]: Start difference. First operand 101 states and 113 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:42,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:42,189 INFO L93 Difference]: Finished difference Result 174 states and 192 transitions. [2021-08-21 18:38:42,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-08-21 18:38:42,190 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:38:42,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:42,190 INFO L225 Difference]: With dead ends: 174 [2021-08-21 18:38:42,190 INFO L226 Difference]: Without dead ends: 174 [2021-08-21 18:38:42,191 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 144.6ms TimeCoverageRelationStatistics Valid=205, Invalid=445, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:38:42,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-08-21 18:38:42,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 92. [2021-08-21 18:38:42,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.10989010989011) internal successors, (101), 91 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:42,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 101 transitions. [2021-08-21 18:38:42,193 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 101 transitions. Word has length 49 [2021-08-21 18:38:42,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:42,193 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 101 transitions. [2021-08-21 18:38:42,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:42,193 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 101 transitions. [2021-08-21 18:38:42,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-08-21 18:38:42,193 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:42,193 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 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 18:38:42,213 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 18:38:42,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:42,411 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:42,411 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:42,411 INFO L82 PathProgramCache]: Analyzing trace with hash 94184446, now seen corresponding path program 16 times [2021-08-21 18:38:42,411 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:42,411 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807020776] [2021-08-21 18:38:42,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:42,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:42,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:42,484 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:42,484 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:42,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807020776] [2021-08-21 18:38:42,484 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807020776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:42,484 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209848831] [2021-08-21 18:38:42,484 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:38:42,484 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:42,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:42,485 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 18:38:42,485 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 18:38:42,947 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:38:42,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:42,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2021-08-21 18:38:42,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:43,145 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 35 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:43,145 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209848831] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:43,145 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:43,145 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-08-21 18:38:43,145 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480494087] [2021-08-21 18:38:43,146 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-08-21 18:38:43,146 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:43,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-08-21 18:38:43,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2021-08-21 18:38:43,146 INFO L87 Difference]: Start difference. First operand 92 states and 101 transitions. Second operand has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:43,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:43,255 INFO L93 Difference]: Finished difference Result 142 states and 151 transitions. [2021-08-21 18:38:43,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-08-21 18:38:43,255 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-08-21 18:38:43,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:43,255 INFO L225 Difference]: With dead ends: 142 [2021-08-21 18:38:43,255 INFO L226 Difference]: Without dead ends: 97 [2021-08-21 18:38:43,256 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 144.2ms TimeCoverageRelationStatistics Valid=152, Invalid=400, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:38:43,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-08-21 18:38:43,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 95. [2021-08-21 18:38:43,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.1063829787234043) internal successors, (104), 94 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:43,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 104 transitions. [2021-08-21 18:38:43,257 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 104 transitions. Word has length 49 [2021-08-21 18:38:43,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:43,258 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 104 transitions. [2021-08-21 18:38:43,258 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.5) internal successors, (63), 18 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:43,258 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 104 transitions. [2021-08-21 18:38:43,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 18:38:43,258 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:43,258 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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 18:38:43,280 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 18:38:43,458 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:43,459 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:43,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:43,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1945380572, now seen corresponding path program 17 times [2021-08-21 18:38:43,459 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:43,459 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766508994] [2021-08-21 18:38:43,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:43,459 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:43,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:43,717 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:43,717 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:43,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766508994] [2021-08-21 18:38:43,717 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766508994] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:43,717 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84036939] [2021-08-21 18:38:43,717 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:38:43,717 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:43,717 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:43,718 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 18:38:43,718 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 18:38:44,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-08-21 18:38:44,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:44,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:38:44,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:44,809 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:38:44,809 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 65 treesize of output 39 [2021-08-21 18:38:44,840 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:44,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84036939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:44,841 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:44,841 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 25 [2021-08-21 18:38:44,841 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316894260] [2021-08-21 18:38:44,841 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-08-21 18:38:44,841 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:44,841 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-08-21 18:38:44,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-08-21 18:38:44,842 INFO L87 Difference]: Start difference. First operand 95 states and 104 transitions. Second operand has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:45,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:45,028 INFO L93 Difference]: Finished difference Result 175 states and 194 transitions. [2021-08-21 18:38:45,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:38:45,029 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-21 18:38:45,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:45,030 INFO L225 Difference]: With dead ends: 175 [2021-08-21 18:38:45,030 INFO L226 Difference]: Without dead ends: 160 [2021-08-21 18:38:45,030 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 351.7ms TimeCoverageRelationStatistics Valid=91, Invalid=665, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:38:45,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-08-21 18:38:45,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 103. [2021-08-21 18:38:45,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.1176470588235294) internal successors, (114), 102 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:45,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 114 transitions. [2021-08-21 18:38:45,032 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 114 transitions. Word has length 52 [2021-08-21 18:38:45,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:45,032 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 114 transitions. [2021-08-21 18:38:45,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.923076923076923) internal successors, (76), 25 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:45,033 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 114 transitions. [2021-08-21 18:38:45,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-08-21 18:38:45,033 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:45,033 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 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 18:38:45,051 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 18:38:45,240 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:45,241 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:45,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:45,241 INFO L82 PathProgramCache]: Analyzing trace with hash 769576564, now seen corresponding path program 18 times [2021-08-21 18:38:45,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:45,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289112632] [2021-08-21 18:38:45,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:45,241 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:45,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:45,554 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:45,554 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:45,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289112632] [2021-08-21 18:38:45,554 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289112632] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:45,554 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [636476771] [2021-08-21 18:38:45,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:38:45,555 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:45,555 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:45,555 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 18:38:45,556 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 18:38:46,067 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-08-21 18:38:46,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:46,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 18:38:46,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:46,658 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:38:46,658 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 67 treesize of output 39 [2021-08-21 18:38:46,695 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:46,695 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [636476771] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:46,695 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:46,695 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18] total 26 [2021-08-21 18:38:46,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846739109] [2021-08-21 18:38:46,696 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:38:46,696 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:46,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:38:46,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=637, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:38:46,696 INFO L87 Difference]: Start difference. First operand 103 states and 114 transitions. Second operand has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:47,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:47,129 INFO L93 Difference]: Finished difference Result 197 states and 220 transitions. [2021-08-21 18:38:47,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:38:47,129 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-08-21 18:38:47,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:47,130 INFO L225 Difference]: With dead ends: 197 [2021-08-21 18:38:47,130 INFO L226 Difference]: Without dead ends: 182 [2021-08-21 18:38:47,130 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 579.9ms TimeCoverageRelationStatistics Valid=123, Invalid=1067, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:38:47,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-08-21 18:38:47,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 113. [2021-08-21 18:38:47,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.1160714285714286) internal successors, (125), 112 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:47,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 125 transitions. [2021-08-21 18:38:47,134 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 125 transitions. Word has length 52 [2021-08-21 18:38:47,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:47,135 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 125 transitions. [2021-08-21 18:38:47,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.814814814814815) internal successors, (76), 26 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:47,135 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 125 transitions. [2021-08-21 18:38:47,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 18:38:47,135 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:47,135 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 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 18:38:47,155 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 18:38:47,356 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:47,356 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:47,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:47,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1724495298, now seen corresponding path program 19 times [2021-08-21 18:38:47,356 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:47,357 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778974396] [2021-08-21 18:38:47,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:47,357 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:47,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:47,448 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:47,448 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:47,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778974396] [2021-08-21 18:38:47,448 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778974396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:47,448 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184119790] [2021-08-21 18:38:47,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:38:47,448 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:47,448 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:47,449 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 18:38:47,450 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 18:38:47,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:47,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 18:38:47,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 35 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:48,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1184119790] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:48,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:48,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-08-21 18:38:48,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479800426] [2021-08-21 18:38:48,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:38:48,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:48,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:38:48,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:38:48,249 INFO L87 Difference]: Start difference. First operand 113 states and 125 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:48,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:48,381 INFO L93 Difference]: Finished difference Result 195 states and 213 transitions. [2021-08-21 18:38:48,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-08-21 18:38:48,381 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 18:38:48,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:48,382 INFO L225 Difference]: With dead ends: 195 [2021-08-21 18:38:48,382 INFO L226 Difference]: Without dead ends: 195 [2021-08-21 18:38:48,382 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 201.9ms TimeCoverageRelationStatistics Valid=270, Invalid=600, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:38:48,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-08-21 18:38:48,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 104. [2021-08-21 18:38:48,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0970873786407767) internal successors, (113), 103 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:48,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 113 transitions. [2021-08-21 18:38:48,384 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 113 transitions. Word has length 55 [2021-08-21 18:38:48,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:48,384 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 113 transitions. [2021-08-21 18:38:48,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:48,384 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 113 transitions. [2021-08-21 18:38:48,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-08-21 18:38:48,385 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:48,385 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 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 18:38:48,404 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 18:38:48,600 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-08-21 18:38:48,601 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:48,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:48,601 INFO L82 PathProgramCache]: Analyzing trace with hash -907715386, now seen corresponding path program 20 times [2021-08-21 18:38:48,601 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:48,601 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1581955196] [2021-08-21 18:38:48,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:48,601 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:48,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:48,686 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:48,686 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:48,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1581955196] [2021-08-21 18:38:48,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1581955196] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:48,686 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1153313091] [2021-08-21 18:38:48,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:38:48,686 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:48,686 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:48,687 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 18:38:48,691 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 18:38:49,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:38:49,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:49,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjunts are in the unsatisfiable core [2021-08-21 18:38:49,259 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:49,523 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 51 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:49,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1153313091] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:49,523 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:49,523 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 21 [2021-08-21 18:38:49,523 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995313322] [2021-08-21 18:38:49,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-08-21 18:38:49,523 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:49,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-08-21 18:38:49,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=309, Unknown=0, NotChecked=0, Total=420 [2021-08-21 18:38:49,524 INFO L87 Difference]: Start difference. First operand 104 states and 113 transitions. Second operand has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:49,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:49,622 INFO L93 Difference]: Finished difference Result 163 states and 172 transitions. [2021-08-21 18:38:49,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-08-21 18:38:49,622 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-08-21 18:38:49,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:49,625 INFO L225 Difference]: With dead ends: 163 [2021-08-21 18:38:49,625 INFO L226 Difference]: Without dead ends: 109 [2021-08-21 18:38:49,625 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 178.3ms TimeCoverageRelationStatistics Valid=202, Invalid=554, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:38:49,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-08-21 18:38:49,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 107. [2021-08-21 18:38:49,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.0943396226415094) internal successors, (116), 106 states have internal predecessors, (116), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:49,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 116 transitions. [2021-08-21 18:38:49,627 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 116 transitions. Word has length 55 [2021-08-21 18:38:49,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:49,627 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 116 transitions. [2021-08-21 18:38:49,627 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.4285714285714284) internal successors, (72), 21 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:49,627 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 116 transitions. [2021-08-21 18:38:49,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-21 18:38:49,627 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:49,627 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 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 18:38:49,645 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 18:38:49,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-08-21 18:38:49,845 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:49,845 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:49,846 INFO L82 PathProgramCache]: Analyzing trace with hash -404415124, now seen corresponding path program 21 times [2021-08-21 18:38:49,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:49,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1398216563] [2021-08-21 18:38:49,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:49,846 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:49,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:50,152 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:50,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:50,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1398216563] [2021-08-21 18:38:50,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1398216563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:50,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [789527453] [2021-08-21 18:38:50,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:38:50,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:50,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:50,154 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 18:38:50,154 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 18:38:50,764 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-08-21 18:38:50,764 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:50,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 18:38:50,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:51,494 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:38:51,494 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 33 [2021-08-21 18:38:51,549 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:51,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [789527453] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:51,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:51,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 28 [2021-08-21 18:38:51,549 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445808673] [2021-08-21 18:38:51,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-08-21 18:38:51,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:51,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-08-21 18:38:51,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=721, Unknown=0, NotChecked=0, Total=812 [2021-08-21 18:38:51,550 INFO L87 Difference]: Start difference. First operand 107 states and 116 transitions. Second operand has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:51,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:51,774 INFO L93 Difference]: Finished difference Result 196 states and 215 transitions. [2021-08-21 18:38:51,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:38:51,774 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-08-21 18:38:51,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:51,775 INFO L225 Difference]: With dead ends: 196 [2021-08-21 18:38:51,775 INFO L226 Difference]: Without dead ends: 181 [2021-08-21 18:38:51,775 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 430.5ms TimeCoverageRelationStatistics Valid=102, Invalid=828, Unknown=0, NotChecked=0, Total=930 [2021-08-21 18:38:51,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-08-21 18:38:51,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 115. [2021-08-21 18:38:51,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.105263157894737) internal successors, (126), 114 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:51,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 126 transitions. [2021-08-21 18:38:51,777 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 126 transitions. Word has length 58 [2021-08-21 18:38:51,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:51,777 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 126 transitions. [2021-08-21 18:38:51,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.9310344827586206) internal successors, (85), 28 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:51,777 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 126 transitions. [2021-08-21 18:38:51,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-08-21 18:38:51,777 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:51,778 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 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 18:38:51,796 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-08-21 18:38:51,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-08-21 18:38:51,989 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:51,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:51,989 INFO L82 PathProgramCache]: Analyzing trace with hash -24526190, now seen corresponding path program 22 times [2021-08-21 18:38:51,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:51,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1059075612] [2021-08-21 18:38:51,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:51,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:51,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:52,358 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:52,358 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:52,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1059075612] [2021-08-21 18:38:52,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1059075612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:52,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [861941405] [2021-08-21 18:38:52,358 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:38:52,358 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:52,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:52,359 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 18:38:52,360 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 18:38:53,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:38:53,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:53,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 18:38:53,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:53,760 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 18:38:53,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 37 [2021-08-21 18:38:53,785 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:53,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [861941405] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:53,785 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:53,785 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2021-08-21 18:38:53,785 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1244176399] [2021-08-21 18:38:53,786 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-08-21 18:38:53,786 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:53,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-08-21 18:38:53,786 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=682, Unknown=0, NotChecked=0, Total=756 [2021-08-21 18:38:53,786 INFO L87 Difference]: Start difference. First operand 115 states and 126 transitions. Second operand has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:54,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:54,032 INFO L93 Difference]: Finished difference Result 203 states and 223 transitions. [2021-08-21 18:38:54,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:38:54,032 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-08-21 18:38:54,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:54,033 INFO L225 Difference]: With dead ends: 203 [2021-08-21 18:38:54,033 INFO L226 Difference]: Without dead ends: 188 [2021-08-21 18:38:54,034 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 48 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 407.3ms TimeCoverageRelationStatistics Valid=84, Invalid=786, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:38:54,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-08-21 18:38:54,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 125. [2021-08-21 18:38:54,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.1048387096774193) internal successors, (137), 124 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:54,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 137 transitions. [2021-08-21 18:38:54,036 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 137 transitions. Word has length 58 [2021-08-21 18:38:54,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:54,036 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 137 transitions. [2021-08-21 18:38:54,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 3.0) internal successors, (84), 27 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:54,036 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 137 transitions. [2021-08-21 18:38:54,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:38:54,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:54,036 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 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 18:38:54,058 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 18:38:54,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:54,237 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:54,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:54,237 INFO L82 PathProgramCache]: Analyzing trace with hash -317140218, now seen corresponding path program 23 times [2021-08-21 18:38:54,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:54,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622958815] [2021-08-21 18:38:54,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:54,238 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:54,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:54,364 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 51 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:54,364 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:54,364 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622958815] [2021-08-21 18:38:54,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622958815] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:54,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374521634] [2021-08-21 18:38:54,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:38:54,365 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:54,365 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:54,365 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 18:38:54,420 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 18:38:55,161 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-08-21 18:38:55,161 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:55,162 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:38:55,163 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:55,428 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 51 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:55,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374521634] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:55,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:55,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-08-21 18:38:55,428 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997580990] [2021-08-21 18:38:55,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:38:55,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:55,429 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:38:55,429 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:38:55,429 INFO L87 Difference]: Start difference. First operand 125 states and 137 transitions. Second operand has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:55,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:55,628 INFO L93 Difference]: Finished difference Result 216 states and 234 transitions. [2021-08-21 18:38:55,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-08-21 18:38:55,629 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:38:55,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:55,629 INFO L225 Difference]: With dead ends: 216 [2021-08-21 18:38:55,629 INFO L226 Difference]: Without dead ends: 216 [2021-08-21 18:38:55,630 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 240.4ms TimeCoverageRelationStatistics Valid=344, Invalid=778, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:38:55,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-08-21 18:38:55,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 116. [2021-08-21 18:38:55,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.0869565217391304) internal successors, (125), 115 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:55,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 125 transitions. [2021-08-21 18:38:55,632 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 125 transitions. Word has length 61 [2021-08-21 18:38:55,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:55,632 INFO L470 AbstractCegarLoop]: Abstraction has 116 states and 125 transitions. [2021-08-21 18:38:55,632 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:55,632 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 125 transitions. [2021-08-21 18:38:55,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-08-21 18:38:55,633 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:55,633 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 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 18:38:55,651 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 18:38:55,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-08-21 18:38:55,841 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:55,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:55,843 INFO L82 PathProgramCache]: Analyzing trace with hash 1383486334, now seen corresponding path program 24 times [2021-08-21 18:38:55,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:55,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739253064] [2021-08-21 18:38:55,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:55,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:55,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:55,949 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 70 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:55,949 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:55,949 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739253064] [2021-08-21 18:38:55,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [739253064] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:55,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292675286] [2021-08-21 18:38:55,950 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:38:55,950 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:55,950 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:55,950 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 18:38:55,951 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 18:38:56,736 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-08-21 18:38:56,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:38:56,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjunts are in the unsatisfiable core [2021-08-21 18:38:56,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:57,040 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 70 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:57,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292675286] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:57,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:57,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 24 [2021-08-21 18:38:57,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588642809] [2021-08-21 18:38:57,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-08-21 18:38:57,041 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:57,041 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-08-21 18:38:57,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=409, Unknown=0, NotChecked=0, Total=552 [2021-08-21 18:38:57,042 INFO L87 Difference]: Start difference. First operand 116 states and 125 transitions. Second operand has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:57,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:57,172 INFO L93 Difference]: Finished difference Result 184 states and 193 transitions. [2021-08-21 18:38:57,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-08-21 18:38:57,172 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-08-21 18:38:57,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:57,173 INFO L225 Difference]: With dead ends: 184 [2021-08-21 18:38:57,173 INFO L226 Difference]: Without dead ends: 121 [2021-08-21 18:38:57,173 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 234.0ms TimeCoverageRelationStatistics Valid=259, Invalid=733, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:38:57,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2021-08-21 18:38:57,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 119. [2021-08-21 18:38:57,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0847457627118644) internal successors, (128), 118 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:57,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 128 transitions. [2021-08-21 18:38:57,175 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 128 transitions. Word has length 61 [2021-08-21 18:38:57,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:57,175 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 128 transitions. [2021-08-21 18:38:57,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.375) internal successors, (81), 24 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:57,175 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 128 transitions. [2021-08-21 18:38:57,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-21 18:38:57,175 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:57,175 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 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 18:38:57,194 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-08-21 18:38:57,385 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-08-21 18:38:57,385 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:57,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:57,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1359970396, now seen corresponding path program 25 times [2021-08-21 18:38:57,385 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:57,385 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880004312] [2021-08-21 18:38:57,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:57,385 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:57,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:57,758 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:57,758 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:38:57,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880004312] [2021-08-21 18:38:57,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880004312] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:57,759 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136860020] [2021-08-21 18:38:57,759 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:38:57,759 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:57,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:38:57,759 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 18:38:57,786 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 18:38:58,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:38:58,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:38:58,570 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:38:59,405 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:38:59,405 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 65 treesize of output 39 [2021-08-21 18:38:59,433 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:38:59,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2136860020] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:38:59,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:38:59,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 31 [2021-08-21 18:38:59,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429600699] [2021-08-21 18:38:59,434 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-08-21 18:38:59,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:38:59,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-08-21 18:38:59,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=102, Invalid=890, Unknown=0, NotChecked=0, Total=992 [2021-08-21 18:38:59,434 INFO L87 Difference]: Start difference. First operand 119 states and 128 transitions. Second operand has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:59,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:38:59,701 INFO L93 Difference]: Finished difference Result 217 states and 236 transitions. [2021-08-21 18:38:59,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:38:59,702 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-08-21 18:38:59,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:38:59,702 INFO L225 Difference]: With dead ends: 217 [2021-08-21 18:38:59,702 INFO L226 Difference]: Without dead ends: 202 [2021-08-21 18:38:59,703 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 559.9ms TimeCoverageRelationStatistics Valid=113, Invalid=1009, Unknown=0, NotChecked=0, Total=1122 [2021-08-21 18:38:59,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-08-21 18:38:59,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 127. [2021-08-21 18:38:59,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.0952380952380953) internal successors, (138), 126 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 18:38:59,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 138 transitions. [2021-08-21 18:38:59,705 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 138 transitions. Word has length 64 [2021-08-21 18:38:59,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:38:59,705 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 138 transitions. [2021-08-21 18:38:59,705 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.9375) internal successors, (94), 31 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:38:59,705 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 138 transitions. [2021-08-21 18:38:59,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-08-21 18:38:59,705 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:38:59,706 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 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 18:38:59,725 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 18:38:59,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:38:59,924 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:38:59,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:38:59,924 INFO L82 PathProgramCache]: Analyzing trace with hash 588406068, now seen corresponding path program 26 times [2021-08-21 18:38:59,924 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:38:59,924 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610911050] [2021-08-21 18:38:59,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:38:59,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:38:59,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:00,340 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:00,340 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:00,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610911050] [2021-08-21 18:39:00,340 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610911050] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:00,340 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55366643] [2021-08-21 18:39:00,357 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:39:00,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:00,357 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:00,357 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 18:39:00,358 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 18:39:01,221 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:39:01,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:01,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 18:39:01,223 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:01,975 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:39:01,976 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 67 treesize of output 39 [2021-08-21 18:39:02,029 INFO L134 CoverageAnalysis]: Checked inductivity of 140 backedges. 0 proven. 140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:02,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55366643] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:02,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:02,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22] total 32 [2021-08-21 18:39:02,030 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792211845] [2021-08-21 18:39:02,030 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 18:39:02,030 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:02,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 18:39:02,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=975, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:39:02,031 INFO L87 Difference]: Start difference. First operand 127 states and 138 transitions. Second operand has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 32 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:02,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:02,604 INFO L93 Difference]: Finished difference Result 239 states and 262 transitions. [2021-08-21 18:39:02,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:39:02,605 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 32 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-08-21 18:39:02,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:02,605 INFO L225 Difference]: With dead ends: 239 [2021-08-21 18:39:02,605 INFO L226 Difference]: Without dead ends: 224 [2021-08-21 18:39:02,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 339 ImplicationChecksByTransitivity, 787.3ms TimeCoverageRelationStatistics Valid=153, Invalid=1653, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:39:02,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-08-21 18:39:02,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 137. [2021-08-21 18:39:02,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0955882352941178) internal successors, (149), 136 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:02,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 149 transitions. [2021-08-21 18:39:02,608 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 149 transitions. Word has length 64 [2021-08-21 18:39:02,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:02,608 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 149 transitions. [2021-08-21 18:39:02,608 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.8484848484848486) internal successors, (94), 32 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:02,608 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 149 transitions. [2021-08-21 18:39:02,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 18:39:02,609 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:02,609 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 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 18:39:02,628 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:02,822 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:02,822 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:02,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:02,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1548229054, now seen corresponding path program 27 times [2021-08-21 18:39:02,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:02,823 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470359780] [2021-08-21 18:39:02,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:02,823 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:02,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:02,974 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 70 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:02,974 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:02,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470359780] [2021-08-21 18:39:02,974 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [470359780] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:02,974 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669747096] [2021-08-21 18:39:02,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:39:02,974 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:02,974 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:02,976 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 18:39:02,977 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 18:39:03,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-08-21 18:39:03,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:03,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:39:03,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:04,214 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 70 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:04,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669747096] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:04,215 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:04,215 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2021-08-21 18:39:04,215 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279907601] [2021-08-21 18:39:04,215 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:39:04,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:04,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:39:04,216 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:39:04,216 INFO L87 Difference]: Start difference. First operand 137 states and 149 transitions. Second operand has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:04,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:04,415 INFO L93 Difference]: Finished difference Result 237 states and 255 transitions. [2021-08-21 18:39:04,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-08-21 18:39:04,416 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 18:39:04,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:04,417 INFO L225 Difference]: With dead ends: 237 [2021-08-21 18:39:04,417 INFO L226 Difference]: Without dead ends: 237 [2021-08-21 18:39:04,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 59 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 303.8ms TimeCoverageRelationStatistics Valid=427, Invalid=979, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:39:04,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2021-08-21 18:39:04,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 128. [2021-08-21 18:39:04,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.078740157480315) internal successors, (137), 127 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:04,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 137 transitions. [2021-08-21 18:39:04,421 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 137 transitions. Word has length 67 [2021-08-21 18:39:04,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:04,421 INFO L470 AbstractCegarLoop]: Abstraction has 128 states and 137 transitions. [2021-08-21 18:39:04,421 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:04,421 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 137 transitions. [2021-08-21 18:39:04,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-08-21 18:39:04,421 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:04,421 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 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 18:39:04,443 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:04,644 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:04,645 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:04,645 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:04,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1479616070, now seen corresponding path program 28 times [2021-08-21 18:39:04,645 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:04,645 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291441554] [2021-08-21 18:39:04,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:04,645 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:04,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:04,774 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 92 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:04,774 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:04,774 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291441554] [2021-08-21 18:39:04,774 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291441554] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:04,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114447407] [2021-08-21 18:39:04,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:39:04,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:04,775 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:04,775 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 18:39:04,776 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 18:39:05,767 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:39:05,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:05,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 18 conjunts are in the unsatisfiable core [2021-08-21 18:39:05,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:06,117 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 92 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:06,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [114447407] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:06,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:06,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2021-08-21 18:39:06,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026334210] [2021-08-21 18:39:06,117 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-08-21 18:39:06,117 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:06,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-08-21 18:39:06,118 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=523, Unknown=0, NotChecked=0, Total=702 [2021-08-21 18:39:06,118 INFO L87 Difference]: Start difference. First operand 128 states and 137 transitions. Second operand has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:06,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:06,260 INFO L93 Difference]: Finished difference Result 205 states and 214 transitions. [2021-08-21 18:39:06,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-08-21 18:39:06,260 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-08-21 18:39:06,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:06,261 INFO L225 Difference]: With dead ends: 205 [2021-08-21 18:39:06,261 INFO L226 Difference]: Without dead ends: 133 [2021-08-21 18:39:06,261 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 289.1ms TimeCoverageRelationStatistics Valid=323, Invalid=937, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:39:06,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2021-08-21 18:39:06,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 131. [2021-08-21 18:39:06,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0769230769230769) internal successors, (140), 130 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:06,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 140 transitions. [2021-08-21 18:39:06,263 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 140 transitions. Word has length 67 [2021-08-21 18:39:06,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:06,264 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 140 transitions. [2021-08-21 18:39:06,264 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.3333333333333335) internal successors, (90), 27 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:06,264 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 140 transitions. [2021-08-21 18:39:06,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-21 18:39:06,264 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:06,264 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 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 18:39:06,286 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 18:39:06,474 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:06,474 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:06,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:06,474 INFO L82 PathProgramCache]: Analyzing trace with hash 1569136108, now seen corresponding path program 29 times [2021-08-21 18:39:06,475 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:06,475 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [652735540] [2021-08-21 18:39:06,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:06,475 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:06,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:06,878 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:06,879 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:06,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [652735540] [2021-08-21 18:39:06,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [652735540] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:06,879 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813440028] [2021-08-21 18:39:06,879 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:39:06,879 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:06,879 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:06,880 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 18:39:06,881 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 18:39:07,890 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-08-21 18:39:07,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:07,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 18:39:07,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:08,817 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:39:08,818 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 33 [2021-08-21 18:39:08,847 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:08,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [813440028] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:08,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:08,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 34 [2021-08-21 18:39:08,847 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1825041872] [2021-08-21 18:39:08,847 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-08-21 18:39:08,847 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:08,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-08-21 18:39:08,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1077, Unknown=0, NotChecked=0, Total=1190 [2021-08-21 18:39:08,848 INFO L87 Difference]: Start difference. First operand 131 states and 140 transitions. Second operand has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:09,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:09,159 INFO L93 Difference]: Finished difference Result 238 states and 257 transitions. [2021-08-21 18:39:09,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:39:09,159 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-21 18:39:09,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:09,161 INFO L225 Difference]: With dead ends: 238 [2021-08-21 18:39:09,161 INFO L226 Difference]: Without dead ends: 223 [2021-08-21 18:39:09,161 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 58 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 615.3ms TimeCoverageRelationStatistics Valid=124, Invalid=1208, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:39:09,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2021-08-21 18:39:09,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 139. [2021-08-21 18:39:09,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0869565217391304) internal successors, (150), 138 states have internal predecessors, (150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:09,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 150 transitions. [2021-08-21 18:39:09,164 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 150 transitions. Word has length 70 [2021-08-21 18:39:09,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:09,164 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 150 transitions. [2021-08-21 18:39:09,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.942857142857143) internal successors, (103), 34 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:09,164 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 150 transitions. [2021-08-21 18:39:09,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-08-21 18:39:09,164 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:09,164 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 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 18:39:09,183 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 18:39:09,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-08-21 18:39:09,372 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:09,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:09,372 INFO L82 PathProgramCache]: Analyzing trace with hash 1085338322, now seen corresponding path program 30 times [2021-08-21 18:39:09,372 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:09,372 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823755073] [2021-08-21 18:39:09,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:09,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:09,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:09,830 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:09,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:09,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823755073] [2021-08-21 18:39:09,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823755073] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:09,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471196042] [2021-08-21 18:39:09,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:39:09,830 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:09,830 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:09,831 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 18:39:09,831 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 18:39:10,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-08-21 18:39:10,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:10,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 18:39:10,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:11,784 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:39:11,785 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-21 18:39:11,806 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:11,806 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471196042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:11,806 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:11,806 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24] total 35 [2021-08-21 18:39:11,806 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266526563] [2021-08-21 18:39:11,807 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 18:39:11,807 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:11,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 18:39:11,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1171, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:39:11,807 INFO L87 Difference]: Start difference. First operand 139 states and 150 transitions. Second operand has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 35 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:12,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:12,524 INFO L93 Difference]: Finished difference Result 260 states and 283 transitions. [2021-08-21 18:39:12,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:39:12,525 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 35 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-08-21 18:39:12,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:12,525 INFO L225 Difference]: With dead ends: 260 [2021-08-21 18:39:12,525 INFO L226 Difference]: Without dead ends: 245 [2021-08-21 18:39:12,526 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 57 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 413 ImplicationChecksByTransitivity, 900.9ms TimeCoverageRelationStatistics Valid=168, Invalid=1994, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:39:12,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2021-08-21 18:39:12,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 149. [2021-08-21 18:39:12,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.087837837837838) internal successors, (161), 148 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:12,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 161 transitions. [2021-08-21 18:39:12,528 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 161 transitions. Word has length 70 [2021-08-21 18:39:12,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:12,529 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 161 transitions. [2021-08-21 18:39:12,529 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.861111111111111) internal successors, (103), 35 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:12,529 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 161 transitions. [2021-08-21 18:39:12,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-08-21 18:39:12,529 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:12,529 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 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 18:39:12,548 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 18:39:12,744 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:12,745 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:12,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:12,745 INFO L82 PathProgramCache]: Analyzing trace with hash 1285897350, now seen corresponding path program 31 times [2021-08-21 18:39:12,745 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:12,745 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577384004] [2021-08-21 18:39:12,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:12,745 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:12,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:12,942 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 92 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:12,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:12,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577384004] [2021-08-21 18:39:12,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577384004] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:12,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2031718845] [2021-08-21 18:39:12,942 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:39:12,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:12,942 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:12,943 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 18:39:12,944 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 18:39:14,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:14,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:39:14,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:14,499 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 92 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:14,499 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2031718845] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:14,499 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:14,499 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2021-08-21 18:39:14,499 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570672362] [2021-08-21 18:39:14,500 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:39:14,500 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:14,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:39:14,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:39:14,500 INFO L87 Difference]: Start difference. First operand 149 states and 161 transitions. Second operand has 30 states, 30 states have (on average 3.3) internal successors, (99), 30 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:14,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:14,696 INFO L93 Difference]: Finished difference Result 258 states and 276 transitions. [2021-08-21 18:39:14,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-08-21 18:39:14,696 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.3) internal successors, (99), 30 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-08-21 18:39:14,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:14,697 INFO L225 Difference]: With dead ends: 258 [2021-08-21 18:39:14,697 INFO L226 Difference]: Without dead ends: 258 [2021-08-21 18:39:14,698 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 64 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 358.8ms TimeCoverageRelationStatistics Valid=519, Invalid=1203, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:39:14,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-08-21 18:39:14,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 140. [2021-08-21 18:39:14,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.0719424460431655) internal successors, (149), 139 states have internal predecessors, (149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:14,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 149 transitions. [2021-08-21 18:39:14,700 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 149 transitions. Word has length 73 [2021-08-21 18:39:14,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:14,700 INFO L470 AbstractCegarLoop]: Abstraction has 140 states and 149 transitions. [2021-08-21 18:39:14,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.3) internal successors, (99), 30 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:14,700 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 149 transitions. [2021-08-21 18:39:14,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-08-21 18:39:14,706 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:14,706 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 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 18:39:14,724 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2021-08-21 18:39:14,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:14,914 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:14,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:14,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1640923902, now seen corresponding path program 32 times [2021-08-21 18:39:14,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:14,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1311290711] [2021-08-21 18:39:14,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:14,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:14,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 117 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:15,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:15,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1311290711] [2021-08-21 18:39:15,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1311290711] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:15,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [337825675] [2021-08-21 18:39:15,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:39:15,066 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:15,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:15,073 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 18:39:15,074 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 18:39:16,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:39:16,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:16,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 20 conjunts are in the unsatisfiable core [2021-08-21 18:39:16,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:16,631 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 117 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:16,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [337825675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:16,631 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:16,631 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 30 [2021-08-21 18:39:16,631 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987230030] [2021-08-21 18:39:16,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-08-21 18:39:16,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:16,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-08-21 18:39:16,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=219, Invalid=651, Unknown=0, NotChecked=0, Total=870 [2021-08-21 18:39:16,632 INFO L87 Difference]: Start difference. First operand 140 states and 149 transitions. Second operand has 30 states, 30 states have (on average 3.3) internal successors, (99), 30 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:16,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:16,827 INFO L93 Difference]: Finished difference Result 226 states and 235 transitions. [2021-08-21 18:39:16,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-08-21 18:39:16,827 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.3) internal successors, (99), 30 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 73 [2021-08-21 18:39:16,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:16,828 INFO L225 Difference]: With dead ends: 226 [2021-08-21 18:39:16,828 INFO L226 Difference]: Without dead ends: 145 [2021-08-21 18:39:16,828 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 348.8ms TimeCoverageRelationStatistics Valid=394, Invalid=1166, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:39:16,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2021-08-21 18:39:16,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 143. [2021-08-21 18:39:16,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0704225352112675) internal successors, (152), 142 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:16,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 152 transitions. [2021-08-21 18:39:16,830 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 152 transitions. Word has length 73 [2021-08-21 18:39:16,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:16,830 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 152 transitions. [2021-08-21 18:39:16,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.3) internal successors, (99), 30 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:16,830 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 152 transitions. [2021-08-21 18:39:16,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 18:39:16,830 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:16,830 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 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 18:39:16,850 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:17,032 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-08-21 18:39:17,033 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:17,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:17,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1009146332, now seen corresponding path program 33 times [2021-08-21 18:39:17,033 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:17,033 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849816592] [2021-08-21 18:39:17,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:17,033 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:17,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:17,477 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:17,478 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:17,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849816592] [2021-08-21 18:39:17,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849816592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:17,478 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091728713] [2021-08-21 18:39:17,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:39:17,478 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:17,478 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:17,479 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 18:39:17,479 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-08-21 18:39:18,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-08-21 18:39:18,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:18,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 18:39:18,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:19,718 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:39:19,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 33 [2021-08-21 18:39:19,738 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:19,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1091728713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:19,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:19,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 37 [2021-08-21 18:39:19,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18730501] [2021-08-21 18:39:19,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-08-21 18:39:19,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:19,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-08-21 18:39:19,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=124, Invalid=1282, Unknown=0, NotChecked=0, Total=1406 [2021-08-21 18:39:19,740 INFO L87 Difference]: Start difference. First operand 143 states and 152 transitions. Second operand has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:20,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:20,144 INFO L93 Difference]: Finished difference Result 259 states and 278 transitions. [2021-08-21 18:39:20,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:39:20,145 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 18:39:20,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:20,145 INFO L225 Difference]: With dead ends: 259 [2021-08-21 18:39:20,145 INFO L226 Difference]: Without dead ends: 244 [2021-08-21 18:39:20,146 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 63 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 691.3ms TimeCoverageRelationStatistics Valid=135, Invalid=1425, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:39:20,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-08-21 18:39:20,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 151. [2021-08-21 18:39:20,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.08) internal successors, (162), 150 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:20,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 162 transitions. [2021-08-21 18:39:20,148 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 162 transitions. Word has length 76 [2021-08-21 18:39:20,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:20,148 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 162 transitions. [2021-08-21 18:39:20,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.9473684210526314) internal successors, (112), 37 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:20,148 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 162 transitions. [2021-08-21 18:39:20,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-08-21 18:39:20,149 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:20,149 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 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 18:39:20,170 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:20,370 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-08-21 18:39:20,370 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:20,370 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:20,370 INFO L82 PathProgramCache]: Analyzing trace with hash 1997224948, now seen corresponding path program 34 times [2021-08-21 18:39:20,370 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:20,371 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312745385] [2021-08-21 18:39:20,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:20,371 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:20,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:20,895 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:20,895 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:20,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312745385] [2021-08-21 18:39:20,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312745385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:20,895 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1784456728] [2021-08-21 18:39:20,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:39:20,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:20,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:20,897 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 18:39:20,934 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 18:39:22,271 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:39:22,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:22,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 18:39:22,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:23,317 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 18:39:23,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 37 [2021-08-21 18:39:23,338 INFO L134 CoverageAnalysis]: Checked inductivity of 234 backedges. 0 proven. 234 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:23,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1784456728] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:23,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:23,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 36 [2021-08-21 18:39:23,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41712900] [2021-08-21 18:39:23,339 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-08-21 18:39:23,339 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:23,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-08-21 18:39:23,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=1231, Unknown=0, NotChecked=0, Total=1332 [2021-08-21 18:39:23,339 INFO L87 Difference]: Start difference. First operand 151 states and 162 transitions. Second operand has 37 states, 37 states have (on average 3.0) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:23,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:23,650 INFO L93 Difference]: Finished difference Result 266 states and 286 transitions. [2021-08-21 18:39:23,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:39:23,650 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 3.0) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-08-21 18:39:23,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:23,651 INFO L225 Difference]: With dead ends: 266 [2021-08-21 18:39:23,651 INFO L226 Difference]: Without dead ends: 251 [2021-08-21 18:39:23,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 63 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 651.7ms TimeCoverageRelationStatistics Valid=111, Invalid=1371, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:39:23,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2021-08-21 18:39:23,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 161. [2021-08-21 18:39:23,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.08125) internal successors, (173), 160 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:23,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 173 transitions. [2021-08-21 18:39:23,654 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 173 transitions. Word has length 76 [2021-08-21 18:39:23,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:23,654 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 173 transitions. [2021-08-21 18:39:23,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 3.0) internal successors, (111), 36 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:23,654 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 173 transitions. [2021-08-21 18:39:23,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-08-21 18:39:23,654 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:23,654 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 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 18:39:23,673 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-08-21 18:39:23,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-08-21 18:39:23,869 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:23,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:23,869 INFO L82 PathProgramCache]: Analyzing trace with hash 837347646, now seen corresponding path program 35 times [2021-08-21 18:39:23,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:23,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937620100] [2021-08-21 18:39:23,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:23,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:23,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:24,046 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 117 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:24,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:24,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937620100] [2021-08-21 18:39:24,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937620100] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:24,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [231592999] [2021-08-21 18:39:24,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:39:24,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:24,047 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:24,047 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 18:39:24,048 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 18:39:25,437 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-08-21 18:39:25,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:25,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 18:39:25,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:25,838 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 117 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:25,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [231592999] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:25,839 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:25,839 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 33 [2021-08-21 18:39:25,839 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1477236985] [2021-08-21 18:39:25,839 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 18:39:25,839 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:25,839 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 18:39:25,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:39:25,840 INFO L87 Difference]: Start difference. First operand 161 states and 173 transitions. Second operand has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:26,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:26,063 INFO L93 Difference]: Finished difference Result 279 states and 297 transitions. [2021-08-21 18:39:26,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-08-21 18:39:26,063 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-08-21 18:39:26,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:26,064 INFO L225 Difference]: With dead ends: 279 [2021-08-21 18:39:26,064 INFO L226 Difference]: Without dead ends: 279 [2021-08-21 18:39:26,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 69 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 508 ImplicationChecksByTransitivity, 372.3ms TimeCoverageRelationStatistics Valid=620, Invalid=1450, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:39:26,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2021-08-21 18:39:26,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 152. [2021-08-21 18:39:26,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0662251655629138) internal successors, (161), 151 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:26,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 161 transitions. [2021-08-21 18:39:26,067 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 161 transitions. Word has length 79 [2021-08-21 18:39:26,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:26,067 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 161 transitions. [2021-08-21 18:39:26,067 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:26,067 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 161 transitions. [2021-08-21 18:39:26,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-08-21 18:39:26,067 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:26,067 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 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 18:39:26,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-08-21 18:39:26,272 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-08-21 18:39:26,273 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:26,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:26,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1071091770, now seen corresponding path program 36 times [2021-08-21 18:39:26,273 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:26,273 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [141890212] [2021-08-21 18:39:26,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:26,273 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:26,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:26,459 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 145 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:26,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:26,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [141890212] [2021-08-21 18:39:26,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [141890212] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:26,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [9138200] [2021-08-21 18:39:26,460 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:39:26,460 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:26,460 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:26,461 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 18:39:26,462 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 18:39:27,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-08-21 18:39:27,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:27,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 22 conjunts are in the unsatisfiable core [2021-08-21 18:39:27,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:28,337 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 145 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:28,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [9138200] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:28,338 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:28,338 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 33 [2021-08-21 18:39:28,338 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1785966074] [2021-08-21 18:39:28,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-08-21 18:39:28,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:28,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-08-21 18:39:28,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=793, Unknown=0, NotChecked=0, Total=1056 [2021-08-21 18:39:28,339 INFO L87 Difference]: Start difference. First operand 152 states and 161 transitions. Second operand has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:28,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:28,536 INFO L93 Difference]: Finished difference Result 247 states and 256 transitions. [2021-08-21 18:39:28,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-08-21 18:39:28,536 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-08-21 18:39:28,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:28,537 INFO L225 Difference]: With dead ends: 247 [2021-08-21 18:39:28,537 INFO L226 Difference]: Without dead ends: 157 [2021-08-21 18:39:28,537 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 430.2ms TimeCoverageRelationStatistics Valid=472, Invalid=1420, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:39:28,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2021-08-21 18:39:28,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 155. [2021-08-21 18:39:28,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0649350649350648) internal successors, (164), 154 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:28,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 164 transitions. [2021-08-21 18:39:28,539 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 164 transitions. Word has length 79 [2021-08-21 18:39:28,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:28,539 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 164 transitions. [2021-08-21 18:39:28,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.272727272727273) internal successors, (108), 33 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:28,540 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 164 transitions. [2021-08-21 18:39:28,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-21 18:39:28,540 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:28,540 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 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 18:39:28,567 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 18:39:28,760 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,38 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:28,760 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:28,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:28,761 INFO L82 PathProgramCache]: Analyzing trace with hash -2110120340, now seen corresponding path program 37 times [2021-08-21 18:39:28,761 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:28,761 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138289042] [2021-08-21 18:39:28,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:28,761 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:28,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:29,254 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:29,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:29,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138289042] [2021-08-21 18:39:29,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138289042] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:29,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767107846] [2021-08-21 18:39:29,254 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:39:29,254 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:29,254 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:29,255 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 18:39:29,256 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 18:39:30,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:30,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-21 18:39:30,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:31,887 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:39:31,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 33 [2021-08-21 18:39:31,908 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:31,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767107846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:31,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:31,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 40 [2021-08-21 18:39:31,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472102211] [2021-08-21 18:39:31,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-08-21 18:39:31,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:31,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-08-21 18:39:31,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=1505, Unknown=0, NotChecked=0, Total=1640 [2021-08-21 18:39:31,909 INFO L87 Difference]: Start difference. First operand 155 states and 164 transitions. Second operand has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:32,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:32,335 INFO L93 Difference]: Finished difference Result 280 states and 299 transitions. [2021-08-21 18:39:32,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:39:32,335 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-08-21 18:39:32,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:32,336 INFO L225 Difference]: With dead ends: 280 [2021-08-21 18:39:32,336 INFO L226 Difference]: Without dead ends: 265 [2021-08-21 18:39:32,337 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 822.6ms TimeCoverageRelationStatistics Valid=146, Invalid=1660, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:39:32,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-08-21 18:39:32,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 163. [2021-08-21 18:39:32,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0740740740740742) internal successors, (174), 162 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:32,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 174 transitions. [2021-08-21 18:39:32,339 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 174 transitions. Word has length 82 [2021-08-21 18:39:32,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:32,339 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 174 transitions. [2021-08-21 18:39:32,339 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.951219512195122) internal successors, (121), 40 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:32,339 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 174 transitions. [2021-08-21 18:39:32,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-08-21 18:39:32,339 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:32,339 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 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 18:39:32,362 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 18:39:32,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-08-21 18:39:32,553 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:32,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:32,553 INFO L82 PathProgramCache]: Analyzing trace with hash -340372718, now seen corresponding path program 38 times [2021-08-21 18:39:32,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:32,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778791483] [2021-08-21 18:39:32,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:32,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:32,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:33,115 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:33,116 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:33,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778791483] [2021-08-21 18:39:33,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778791483] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:33,116 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722293414] [2021-08-21 18:39:33,116 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:39:33,116 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:33,116 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:33,117 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 18:39:33,118 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 18:39:34,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:39:34,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:34,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-21 18:39:34,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:35,802 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 18:39:35,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 37 [2021-08-21 18:39:35,821 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 0 proven. 290 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:35,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722293414] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:35,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:35,822 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 39 [2021-08-21 18:39:35,822 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787380703] [2021-08-21 18:39:35,822 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-08-21 18:39:35,822 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:35,822 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-08-21 18:39:35,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1450, Unknown=0, NotChecked=0, Total=1560 [2021-08-21 18:39:35,823 INFO L87 Difference]: Start difference. First operand 163 states and 174 transitions. Second operand has 40 states, 40 states have (on average 3.0) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:36,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:36,270 INFO L93 Difference]: Finished difference Result 287 states and 307 transitions. [2021-08-21 18:39:36,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:39:36,271 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 3.0) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-08-21 18:39:36,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:36,272 INFO L225 Difference]: With dead ends: 287 [2021-08-21 18:39:36,272 INFO L226 Difference]: Without dead ends: 272 [2021-08-21 18:39:36,272 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 68 SyntacticMatches, 2 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 408 ImplicationChecksByTransitivity, 723.1ms TimeCoverageRelationStatistics Valid=120, Invalid=1602, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:39:36,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2021-08-21 18:39:36,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 173. [2021-08-21 18:39:36,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.0755813953488371) internal successors, (185), 172 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:36,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 185 transitions. [2021-08-21 18:39:36,275 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 185 transitions. Word has length 82 [2021-08-21 18:39:36,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:36,275 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 185 transitions. [2021-08-21 18:39:36,275 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 3.0) internal successors, (120), 39 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:36,275 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 185 transitions. [2021-08-21 18:39:36,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-21 18:39:36,275 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:36,275 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 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 18:39:36,299 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 18:39:36,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-08-21 18:39:36,497 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:36,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:36,498 INFO L82 PathProgramCache]: Analyzing trace with hash -1980946938, now seen corresponding path program 39 times [2021-08-21 18:39:36,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:36,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1589606451] [2021-08-21 18:39:36,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:36,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:36,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:36,733 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 145 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:36,734 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:36,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1589606451] [2021-08-21 18:39:36,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1589606451] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:36,734 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425437464] [2021-08-21 18:39:36,734 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:39:36,734 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:36,734 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:36,735 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 18:39:36,736 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 18:39:38,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-08-21 18:39:38,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:38,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 18:39:38,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:38,924 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 145 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:38,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425437464] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:38,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:38,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 36 [2021-08-21 18:39:38,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528211883] [2021-08-21 18:39:38,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 18:39:38,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:38,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 18:39:38,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:39:38,926 INFO L87 Difference]: Start difference. First operand 173 states and 185 transitions. Second operand has 36 states, 36 states have (on average 3.25) internal successors, (117), 36 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:39,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:39,186 INFO L93 Difference]: Finished difference Result 300 states and 318 transitions. [2021-08-21 18:39:39,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-08-21 18:39:39,187 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.25) internal successors, (117), 36 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-21 18:39:39,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:39,187 INFO L225 Difference]: With dead ends: 300 [2021-08-21 18:39:39,187 INFO L226 Difference]: Without dead ends: 300 [2021-08-21 18:39:39,188 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 123 GetRequests, 74 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 466.1ms TimeCoverageRelationStatistics Valid=730, Invalid=1720, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 18:39:39,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 300 states. [2021-08-21 18:39:39,189 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 300 to 164. [2021-08-21 18:39:39,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.0613496932515338) internal successors, (173), 163 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:39,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 173 transitions. [2021-08-21 18:39:39,190 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 173 transitions. Word has length 85 [2021-08-21 18:39:39,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:39,190 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 173 transitions. [2021-08-21 18:39:39,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.25) internal successors, (117), 36 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:39,190 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 173 transitions. [2021-08-21 18:39:39,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-08-21 18:39:39,190 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:39,191 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 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 18:39:39,212 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-08-21 18:39:39,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-08-21 18:39:39,405 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:39,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:39,405 INFO L82 PathProgramCache]: Analyzing trace with hash 477475454, now seen corresponding path program 40 times [2021-08-21 18:39:39,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:39,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995412160] [2021-08-21 18:39:39,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:39,405 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 176 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:39,642 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:39,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995412160] [2021-08-21 18:39:39,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995412160] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:39,642 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1298536808] [2021-08-21 18:39:39,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:39:39,643 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:39,643 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:39,643 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 18:39:39,644 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 18:39:41,328 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:39:41,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:41,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 24 conjunts are in the unsatisfiable core [2021-08-21 18:39:41,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 176 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:41,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1298536808] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:41,827 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:41,827 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 36 [2021-08-21 18:39:41,827 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150401357] [2021-08-21 18:39:41,828 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-08-21 18:39:41,828 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:41,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-08-21 18:39:41,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=949, Unknown=0, NotChecked=0, Total=1260 [2021-08-21 18:39:41,828 INFO L87 Difference]: Start difference. First operand 164 states and 173 transitions. Second operand has 36 states, 36 states have (on average 3.25) internal successors, (117), 36 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:42,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:42,043 INFO L93 Difference]: Finished difference Result 268 states and 277 transitions. [2021-08-21 18:39:42,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-08-21 18:39:42,044 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 3.25) internal successors, (117), 36 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 85 [2021-08-21 18:39:42,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:42,044 INFO L225 Difference]: With dead ends: 268 [2021-08-21 18:39:42,044 INFO L226 Difference]: Without dead ends: 169 [2021-08-21 18:39:42,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 508.0ms TimeCoverageRelationStatistics Valid=557, Invalid=1699, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:39:42,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2021-08-21 18:39:42,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 167. [2021-08-21 18:39:42,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0602409638554218) internal successors, (176), 166 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:42,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 176 transitions. [2021-08-21 18:39:42,047 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 176 transitions. Word has length 85 [2021-08-21 18:39:42,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:42,047 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 176 transitions. [2021-08-21 18:39:42,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 3.25) internal successors, (117), 36 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:42,047 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 176 transitions. [2021-08-21 18:39:42,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-08-21 18:39:42,047 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:42,047 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 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 18:39:42,068 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 18:39:42,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,42 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:42,257 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:42,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:42,257 INFO L82 PathProgramCache]: Analyzing trace with hash 391597220, now seen corresponding path program 41 times [2021-08-21 18:39:42,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:42,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604849165] [2021-08-21 18:39:42,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:42,257 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:42,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:42,850 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:42,850 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:42,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604849165] [2021-08-21 18:39:42,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604849165] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:42,851 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674183347] [2021-08-21 18:39:42,851 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:39:42,851 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:42,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:42,851 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 18:39:42,852 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 18:39:44,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-08-21 18:39:44,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:44,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:39:44,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:45,968 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:39:45,968 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 65 treesize of output 39 [2021-08-21 18:39:45,994 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:45,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674183347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:45,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:45,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 43 [2021-08-21 18:39:45,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045279529] [2021-08-21 18:39:45,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-08-21 18:39:45,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:45,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-08-21 18:39:45,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=1746, Unknown=0, NotChecked=0, Total=1892 [2021-08-21 18:39:45,995 INFO L87 Difference]: Start difference. First operand 167 states and 176 transitions. Second operand has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 43 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:46,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:46,415 INFO L93 Difference]: Finished difference Result 301 states and 320 transitions. [2021-08-21 18:39:46,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:39:46,416 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 43 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-08-21 18:39:46,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:46,417 INFO L225 Difference]: With dead ends: 301 [2021-08-21 18:39:46,417 INFO L226 Difference]: Without dead ends: 286 [2021-08-21 18:39:46,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 73 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 968.5ms TimeCoverageRelationStatistics Valid=157, Invalid=1913, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:39:46,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 286 states. [2021-08-21 18:39:46,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 286 to 175. [2021-08-21 18:39:46,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0689655172413792) internal successors, (186), 174 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:46,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 186 transitions. [2021-08-21 18:39:46,425 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 186 transitions. Word has length 88 [2021-08-21 18:39:46,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:46,425 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 186 transitions. [2021-08-21 18:39:46,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.9545454545454546) internal successors, (130), 43 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:46,425 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 186 transitions. [2021-08-21 18:39:46,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-08-21 18:39:46,426 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:46,426 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 11, 11, 11, 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 18:39:46,447 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-08-21 18:39:46,636 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,43 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:46,636 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:46,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:46,636 INFO L82 PathProgramCache]: Analyzing trace with hash -159552844, now seen corresponding path program 42 times [2021-08-21 18:39:46,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:46,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468432380] [2021-08-21 18:39:46,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:46,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:46,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:47,284 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:47,285 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:47,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468432380] [2021-08-21 18:39:47,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468432380] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:47,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [745518343] [2021-08-21 18:39:47,285 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:39:47,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:47,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:47,286 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 18:39:47,286 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 18:39:49,121 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 12 check-sat command(s) [2021-08-21 18:39:49,121 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:49,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:39:49,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:50,379 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 18:39:50,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 41 [2021-08-21 18:39:50,400 INFO L134 CoverageAnalysis]: Checked inductivity of 352 backedges. 0 proven. 352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:50,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [745518343] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:50,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:50,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 42 [2021-08-21 18:39:50,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402424854] [2021-08-21 18:39:50,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-08-21 18:39:50,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:50,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-08-21 18:39:50,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=1687, Unknown=0, NotChecked=0, Total=1806 [2021-08-21 18:39:50,401 INFO L87 Difference]: Start difference. First operand 175 states and 186 transitions. Second operand has 43 states, 43 states have (on average 3.0) internal successors, (129), 42 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:50,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:50,853 INFO L93 Difference]: Finished difference Result 308 states and 328 transitions. [2021-08-21 18:39:50,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:39:50,854 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 3.0) internal successors, (129), 42 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-08-21 18:39:50,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:50,854 INFO L225 Difference]: With dead ends: 308 [2021-08-21 18:39:50,854 INFO L226 Difference]: Without dead ends: 293 [2021-08-21 18:39:50,855 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 73 SyntacticMatches, 2 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 475 ImplicationChecksByTransitivity, 844.1ms TimeCoverageRelationStatistics Valid=129, Invalid=1851, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:39:50,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 293 states. [2021-08-21 18:39:50,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 293 to 185. [2021-08-21 18:39:50,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0706521739130435) internal successors, (197), 184 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 18:39:50,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 197 transitions. [2021-08-21 18:39:50,857 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 197 transitions. Word has length 88 [2021-08-21 18:39:50,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:50,857 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 197 transitions. [2021-08-21 18:39:50,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 3.0) internal successors, (129), 42 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:50,857 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 197 transitions. [2021-08-21 18:39:50,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-08-21 18:39:50,858 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:50,858 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 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 18:39:50,884 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-08-21 18:39:51,069 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-08-21 18:39:51,069 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:51,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:51,069 INFO L82 PathProgramCache]: Analyzing trace with hash 1793636542, now seen corresponding path program 43 times [2021-08-21 18:39:51,069 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:51,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519152057] [2021-08-21 18:39:51,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:51,070 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:51,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:51,306 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 176 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:51,306 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:51,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519152057] [2021-08-21 18:39:51,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1519152057] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:51,306 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065251363] [2021-08-21 18:39:51,306 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:39:51,306 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:51,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:51,307 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 18:39:51,336 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 18:39:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:53,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:39:53,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:53,746 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 176 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:53,747 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065251363] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:53,747 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:53,747 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 39 [2021-08-21 18:39:53,747 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456797745] [2021-08-21 18:39:53,747 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 18:39:53,747 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:53,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 18:39:53,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:39:53,748 INFO L87 Difference]: Start difference. First operand 185 states and 197 transitions. Second operand has 39 states, 39 states have (on average 3.230769230769231) internal successors, (126), 39 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:54,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:54,043 INFO L93 Difference]: Finished difference Result 321 states and 339 transitions. [2021-08-21 18:39:54,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-08-21 18:39:54,044 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.230769230769231) internal successors, (126), 39 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-08-21 18:39:54,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:54,045 INFO L225 Difference]: With dead ends: 321 [2021-08-21 18:39:54,045 INFO L226 Difference]: Without dead ends: 321 [2021-08-21 18:39:54,045 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 79 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 730 ImplicationChecksByTransitivity, 496.1ms TimeCoverageRelationStatistics Valid=849, Invalid=2013, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 18:39:54,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-08-21 18:39:54,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 176. [2021-08-21 18:39:54,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0571428571428572) internal successors, (185), 175 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:54,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 185 transitions. [2021-08-21 18:39:54,047 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 185 transitions. Word has length 91 [2021-08-21 18:39:54,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:54,047 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 185 transitions. [2021-08-21 18:39:54,047 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.230769230769231) internal successors, (126), 39 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:54,047 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 185 transitions. [2021-08-21 18:39:54,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-08-21 18:39:54,048 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:54,048 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 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 18:39:54,070 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 18:39:54,258 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-08-21 18:39:54,258 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:54,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:54,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1422182074, now seen corresponding path program 44 times [2021-08-21 18:39:54,259 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:54,259 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524735832] [2021-08-21 18:39:54,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:54,259 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:54,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:54,492 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 210 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:54,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:54,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524735832] [2021-08-21 18:39:54,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524735832] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:54,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1869581729] [2021-08-21 18:39:54,493 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:39:54,493 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:54,493 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:54,494 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 18:39:54,494 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 18:39:56,478 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:39:56,478 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:39:56,479 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 26 conjunts are in the unsatisfiable core [2021-08-21 18:39:56,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:39:57,027 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 210 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:57,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1869581729] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:57,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:39:57,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 39 [2021-08-21 18:39:57,028 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748401909] [2021-08-21 18:39:57,028 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-08-21 18:39:57,028 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:39:57,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-08-21 18:39:57,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=363, Invalid=1119, Unknown=0, NotChecked=0, Total=1482 [2021-08-21 18:39:57,029 INFO L87 Difference]: Start difference. First operand 176 states and 185 transitions. Second operand has 39 states, 39 states have (on average 3.230769230769231) internal successors, (126), 39 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:57,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:39:57,268 INFO L93 Difference]: Finished difference Result 289 states and 298 transitions. [2021-08-21 18:39:57,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-08-21 18:39:57,269 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 3.230769230769231) internal successors, (126), 39 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-08-21 18:39:57,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:39:57,269 INFO L225 Difference]: With dead ends: 289 [2021-08-21 18:39:57,269 INFO L226 Difference]: Without dead ends: 181 [2021-08-21 18:39:57,270 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 474 ImplicationChecksByTransitivity, 551.7ms TimeCoverageRelationStatistics Valid=649, Invalid=2003, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 18:39:57,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-08-21 18:39:57,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 179. [2021-08-21 18:39:57,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0561797752808988) internal successors, (188), 178 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:57,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 188 transitions. [2021-08-21 18:39:57,271 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 188 transitions. Word has length 91 [2021-08-21 18:39:57,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:39:57,272 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 188 transitions. [2021-08-21 18:39:57,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 3.230769230769231) internal successors, (126), 39 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:39:57,272 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 188 transitions. [2021-08-21 18:39:57,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-08-21 18:39:57,272 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:39:57,272 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 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 18:39:57,294 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-08-21 18:39:57,476 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-08-21 18:39:57,477 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:39:57,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:39:57,477 INFO L82 PathProgramCache]: Analyzing trace with hash -1825693972, now seen corresponding path program 45 times [2021-08-21 18:39:57,477 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:39:57,477 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041952541] [2021-08-21 18:39:57,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:39:57,477 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:39:57,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:39:58,140 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:39:58,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:39:58,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041952541] [2021-08-21 18:39:58,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041952541] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:39:58,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645933120] [2021-08-21 18:39:58,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:39:58,141 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:39:58,141 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:39:58,141 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 18:39:58,142 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 18:40:00,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-08-21 18:40:00,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:00,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 62 conjunts are in the unsatisfiable core [2021-08-21 18:40:00,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:01,616 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:40:01,616 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 33 [2021-08-21 18:40:01,645 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:01,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645933120] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:01,646 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:01,646 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 46 [2021-08-21 18:40:01,646 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [540954402] [2021-08-21 18:40:01,646 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-08-21 18:40:01,646 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:01,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-08-21 18:40:01,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=157, Invalid=2005, Unknown=0, NotChecked=0, Total=2162 [2021-08-21 18:40:01,647 INFO L87 Difference]: Start difference. First operand 179 states and 188 transitions. Second operand has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:02,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:02,241 INFO L93 Difference]: Finished difference Result 322 states and 341 transitions. [2021-08-21 18:40:02,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:40:02,242 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-08-21 18:40:02,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:02,243 INFO L225 Difference]: With dead ends: 322 [2021-08-21 18:40:02,243 INFO L226 Difference]: Without dead ends: 307 [2021-08-21 18:40:02,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 78 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 1105.0ms TimeCoverageRelationStatistics Valid=168, Invalid=2184, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 18:40:02,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-08-21 18:40:02,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 187. [2021-08-21 18:40:02,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.064516129032258) internal successors, (198), 186 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:02,245 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 198 transitions. [2021-08-21 18:40:02,245 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 198 transitions. Word has length 94 [2021-08-21 18:40:02,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:02,246 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 198 transitions. [2021-08-21 18:40:02,246 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.9574468085106385) internal successors, (139), 46 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 198 transitions. [2021-08-21 18:40:02,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-08-21 18:40:02,246 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:02,246 INFO L512 BasicCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 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 18:40:02,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-08-21 18:40:02,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,47 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:02,449 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:02,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:02,449 INFO L82 PathProgramCache]: Analyzing trace with hash 438690642, now seen corresponding path program 46 times [2021-08-21 18:40:02,449 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:02,449 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919605791] [2021-08-21 18:40:02,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:02,449 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:02,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:03,238 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:03,239 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:03,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919605791] [2021-08-21 18:40:03,239 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919605791] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:03,239 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603247084] [2021-08-21 18:40:03,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:40:03,239 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:03,239 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:03,239 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 18:40:03,240 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 18:40:05,421 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:40:05,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:05,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 174 conjuncts, 62 conjunts are in the unsatisfiable core [2021-08-21 18:40:05,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:06,856 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 18:40:06,856 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 37 [2021-08-21 18:40:06,879 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 0 proven. 420 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:06,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1603247084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:06,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:06,879 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 45 [2021-08-21 18:40:06,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750315341] [2021-08-21 18:40:06,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-08-21 18:40:06,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:06,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-08-21 18:40:06,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=128, Invalid=1942, Unknown=0, NotChecked=0, Total=2070 [2021-08-21 18:40:06,881 INFO L87 Difference]: Start difference. First operand 187 states and 198 transitions. Second operand has 46 states, 46 states have (on average 3.0) internal successors, (138), 45 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 18:40:07,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:07,429 INFO L93 Difference]: Finished difference Result 329 states and 349 transitions. [2021-08-21 18:40:07,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:40:07,430 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 3.0) internal successors, (138), 45 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) Word has length 94 [2021-08-21 18:40:07,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:07,431 INFO L225 Difference]: With dead ends: 329 [2021-08-21 18:40:07,431 INFO L226 Difference]: Without dead ends: 314 [2021-08-21 18:40:07,431 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 78 SyntacticMatches, 2 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 547 ImplicationChecksByTransitivity, 1014.2ms TimeCoverageRelationStatistics Valid=138, Invalid=2118, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:40:07,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 314 states. [2021-08-21 18:40:07,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 314 to 197. [2021-08-21 18:40:07,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.066326530612245) internal successors, (209), 196 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:07,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 209 transitions. [2021-08-21 18:40:07,433 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 209 transitions. Word has length 94 [2021-08-21 18:40:07,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:07,434 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 209 transitions. [2021-08-21 18:40:07,434 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 3.0) internal successors, (138), 45 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 18:40:07,434 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 209 transitions. [2021-08-21 18:40:07,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-08-21 18:40:07,434 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:07,434 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 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 18:40:07,458 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-08-21 18:40:07,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,48 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:07,649 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:07,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:07,649 INFO L82 PathProgramCache]: Analyzing trace with hash -1235185786, now seen corresponding path program 47 times [2021-08-21 18:40:07,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:07,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1197450389] [2021-08-21 18:40:07,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:07,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:07,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:07,985 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 210 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:07,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:07,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1197450389] [2021-08-21 18:40:07,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1197450389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:07,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1141688520] [2021-08-21 18:40:07,985 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:40:07,985 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:07,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:07,986 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 18:40:07,988 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 18:40:10,289 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-08-21 18:40:10,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:10,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:40:10,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:10,820 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 210 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:10,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1141688520] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:10,820 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:10,820 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 42 [2021-08-21 18:40:10,820 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350036345] [2021-08-21 18:40:10,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 18:40:10,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:10,821 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 18:40:10,821 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:40:10,821 INFO L87 Difference]: Start difference. First operand 197 states and 209 transitions. Second operand has 42 states, 42 states have (on average 3.2142857142857144) internal successors, (135), 42 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:11,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:11,153 INFO L93 Difference]: Finished difference Result 342 states and 360 transitions. [2021-08-21 18:40:11,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-08-21 18:40:11,153 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.2142857142857144) internal successors, (135), 42 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-08-21 18:40:11,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:11,154 INFO L225 Difference]: With dead ends: 342 [2021-08-21 18:40:11,154 INFO L226 Difference]: Without dead ends: 342 [2021-08-21 18:40:11,155 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 141 GetRequests, 84 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 606.4ms TimeCoverageRelationStatistics Valid=977, Invalid=2329, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 18:40:11,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2021-08-21 18:40:11,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 188. [2021-08-21 18:40:11,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.053475935828877) internal successors, (197), 187 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 18:40:11,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 197 transitions. [2021-08-21 18:40:11,157 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 197 transitions. Word has length 97 [2021-08-21 18:40:11,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:11,157 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 197 transitions. [2021-08-21 18:40:11,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.2142857142857144) internal successors, (135), 42 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:11,157 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 197 transitions. [2021-08-21 18:40:11,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-08-21 18:40:11,158 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:11,158 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 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 18:40:11,182 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2021-08-21 18:40:11,358 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,49 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:11,358 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:11,358 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:11,359 INFO L82 PathProgramCache]: Analyzing trace with hash -147070466, now seen corresponding path program 48 times [2021-08-21 18:40:11,359 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:11,359 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342944952] [2021-08-21 18:40:11,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:11,359 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:11,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:11,641 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 247 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:11,641 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:11,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342944952] [2021-08-21 18:40:11,641 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342944952] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:11,641 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903799389] [2021-08-21 18:40:11,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:40:11,641 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:11,641 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:11,642 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 18:40:11,643 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 18:40:14,030 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2021-08-21 18:40:14,030 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:14,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 28 conjunts are in the unsatisfiable core [2021-08-21 18:40:14,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:14,665 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 247 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:14,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903799389] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:14,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:14,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 42 [2021-08-21 18:40:14,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714345923] [2021-08-21 18:40:14,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-08-21 18:40:14,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:14,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-08-21 18:40:14,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=419, Invalid=1303, Unknown=0, NotChecked=0, Total=1722 [2021-08-21 18:40:14,667 INFO L87 Difference]: Start difference. First operand 188 states and 197 transitions. Second operand has 42 states, 42 states have (on average 3.2142857142857144) internal successors, (135), 42 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:14,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:14,974 INFO L93 Difference]: Finished difference Result 310 states and 319 transitions. [2021-08-21 18:40:14,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-08-21 18:40:14,975 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 3.2142857142857144) internal successors, (135), 42 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 97 [2021-08-21 18:40:14,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:14,975 INFO L225 Difference]: With dead ends: 310 [2021-08-21 18:40:14,975 INFO L226 Difference]: Without dead ends: 193 [2021-08-21 18:40:14,976 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 676.0ms TimeCoverageRelationStatistics Valid=748, Invalid=2332, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:40:14,976 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2021-08-21 18:40:14,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 191. [2021-08-21 18:40:14,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0526315789473684) internal successors, (200), 190 states have internal predecessors, (200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:14,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 200 transitions. [2021-08-21 18:40:14,978 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 200 transitions. Word has length 97 [2021-08-21 18:40:14,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:14,978 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 200 transitions. [2021-08-21 18:40:14,978 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 3.2142857142857144) internal successors, (135), 42 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:14,978 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 200 transitions. [2021-08-21 18:40:14,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-21 18:40:14,978 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:14,978 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 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 18:40:15,003 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 18:40:15,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-08-21 18:40:15,198 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:15,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:15,198 INFO L82 PathProgramCache]: Analyzing trace with hash -503745756, now seen corresponding path program 49 times [2021-08-21 18:40:15,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:15,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681625416] [2021-08-21 18:40:15,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:15,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:15,943 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:15,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:15,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681625416] [2021-08-21 18:40:15,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681625416] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:15,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537935775] [2021-08-21 18:40:15,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:40:15,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:15,943 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:15,944 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 18:40:15,945 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 18:40:18,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:18,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-21 18:40:18,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:19,835 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:40:19,835 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 65 treesize of output 39 [2021-08-21 18:40:19,885 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:19,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537935775] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:19,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:19,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 49 [2021-08-21 18:40:19,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770582041] [2021-08-21 18:40:19,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-08-21 18:40:19,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:19,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-08-21 18:40:19,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=2282, Unknown=0, NotChecked=0, Total=2450 [2021-08-21 18:40:19,886 INFO L87 Difference]: Start difference. First operand 191 states and 200 transitions. Second operand has 50 states, 50 states have (on average 2.96) internal successors, (148), 49 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:20,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:20,591 INFO L93 Difference]: Finished difference Result 343 states and 362 transitions. [2021-08-21 18:40:20,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:40:20,591 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.96) internal successors, (148), 49 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-21 18:40:20,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:20,592 INFO L225 Difference]: With dead ends: 343 [2021-08-21 18:40:20,592 INFO L226 Difference]: Without dead ends: 328 [2021-08-21 18:40:20,592 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 83 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 1222.0ms TimeCoverageRelationStatistics Valid=179, Invalid=2473, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 18:40:20,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 328 states. [2021-08-21 18:40:20,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 328 to 199. [2021-08-21 18:40:20,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.0606060606060606) internal successors, (210), 198 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:20,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 210 transitions. [2021-08-21 18:40:20,594 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 210 transitions. Word has length 100 [2021-08-21 18:40:20,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:20,595 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 210 transitions. [2021-08-21 18:40:20,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.96) internal successors, (148), 49 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:20,595 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 210 transitions. [2021-08-21 18:40:20,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-08-21 18:40:20,595 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:20,595 INFO L512 BasicCegarLoop]: trace histogram [13, 13, 13, 13, 13, 13, 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 18:40:20,619 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-08-21 18:40:20,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-08-21 18:40:20,809 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:20,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:20,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1357059724, now seen corresponding path program 50 times [2021-08-21 18:40:20,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:20,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813599461] [2021-08-21 18:40:20,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:20,809 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:20,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:21,574 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:21,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813599461] [2021-08-21 18:40:21,574 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813599461] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:21,574 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37132142] [2021-08-21 18:40:21,574 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:40:21,574 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:21,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:21,575 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 18:40:21,579 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 18:40:24,064 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:40:24,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:24,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 66 conjunts are in the unsatisfiable core [2021-08-21 18:40:24,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:25,579 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 18:40:25,579 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 41 [2021-08-21 18:40:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 494 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:25,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37132142] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:25,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:25,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 48 [2021-08-21 18:40:25,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014855948] [2021-08-21 18:40:25,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-08-21 18:40:25,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:25,618 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-08-21 18:40:25,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=2215, Unknown=0, NotChecked=0, Total=2352 [2021-08-21 18:40:25,619 INFO L87 Difference]: Start difference. First operand 199 states and 210 transitions. Second operand has 49 states, 49 states have (on average 3.0) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:26,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:26,207 INFO L93 Difference]: Finished difference Result 350 states and 370 transitions. [2021-08-21 18:40:26,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:40:26,207 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 3.0) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-08-21 18:40:26,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:26,208 INFO L225 Difference]: With dead ends: 350 [2021-08-21 18:40:26,208 INFO L226 Difference]: Without dead ends: 335 [2021-08-21 18:40:26,209 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 83 SyntacticMatches, 2 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 1073.5ms TimeCoverageRelationStatistics Valid=147, Invalid=2403, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:40:26,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 335 states. [2021-08-21 18:40:26,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 335 to 209. [2021-08-21 18:40:26,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0625) internal successors, (221), 208 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:26,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 221 transitions. [2021-08-21 18:40:26,211 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 221 transitions. Word has length 100 [2021-08-21 18:40:26,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:26,211 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 221 transitions. [2021-08-21 18:40:26,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 3.0) internal successors, (147), 48 states have internal predecessors, (147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:26,211 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 221 transitions. [2021-08-21 18:40:26,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-08-21 18:40:26,212 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:26,212 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 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 18:40:26,237 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 18:40:26,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,52 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:26,432 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:26,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:26,433 INFO L82 PathProgramCache]: Analyzing trace with hash -468219842, now seen corresponding path program 51 times [2021-08-21 18:40:26,433 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:26,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76047691] [2021-08-21 18:40:26,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:26,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:26,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:26,769 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 247 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:26,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:26,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76047691] [2021-08-21 18:40:26,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76047691] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:26,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409060795] [2021-08-21 18:40:26,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:40:26,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:26,770 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:26,770 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 18:40:26,771 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 18:40:29,385 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-08-21 18:40:29,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:29,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:40:29,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:29,952 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 247 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:29,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409060795] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:29,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:29,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 45 [2021-08-21 18:40:29,953 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [541111621] [2021-08-21 18:40:29,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-21 18:40:29,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:29,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-21 18:40:29,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=1501, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:40:29,953 INFO L87 Difference]: Start difference. First operand 209 states and 221 transitions. Second operand has 45 states, 45 states have (on average 3.2) internal successors, (144), 45 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:30,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:30,290 INFO L93 Difference]: Finished difference Result 363 states and 381 transitions. [2021-08-21 18:40:30,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-08-21 18:40:30,291 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.2) internal successors, (144), 45 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-08-21 18:40:30,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:30,292 INFO L225 Difference]: With dead ends: 363 [2021-08-21 18:40:30,292 INFO L226 Difference]: Without dead ends: 363 [2021-08-21 18:40:30,292 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 89 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 992 ImplicationChecksByTransitivity, 647.3ms TimeCoverageRelationStatistics Valid=1114, Invalid=2668, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:40:30,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-08-21 18:40:30,294 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 200. [2021-08-21 18:40:30,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.050251256281407) internal successors, (209), 199 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:30,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 209 transitions. [2021-08-21 18:40:30,295 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 209 transitions. Word has length 103 [2021-08-21 18:40:30,295 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:30,295 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 209 transitions. [2021-08-21 18:40:30,295 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.2) internal successors, (144), 45 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:30,295 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 209 transitions. [2021-08-21 18:40:30,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-08-21 18:40:30,295 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:30,296 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 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 18:40:30,324 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-08-21 18:40:30,516 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-08-21 18:40:30,517 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:30,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:30,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1457095366, now seen corresponding path program 52 times [2021-08-21 18:40:30,517 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:30,517 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1832341966] [2021-08-21 18:40:30,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:30,517 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:30,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:30,852 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 287 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:30,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:30,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1832341966] [2021-08-21 18:40:30,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1832341966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:30,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767876864] [2021-08-21 18:40:30,852 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:40:30,853 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:30,853 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:30,853 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 18:40:30,854 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-08-21 18:40:33,513 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:40:33,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:33,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 30 conjunts are in the unsatisfiable core [2021-08-21 18:40:33,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:34,182 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 287 proven. 247 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:34,182 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767876864] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:34,182 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:34,182 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 45 [2021-08-21 18:40:34,182 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998452121] [2021-08-21 18:40:34,183 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-08-21 18:40:34,183 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:34,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-08-21 18:40:34,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=479, Invalid=1501, Unknown=0, NotChecked=0, Total=1980 [2021-08-21 18:40:34,183 INFO L87 Difference]: Start difference. First operand 200 states and 209 transitions. Second operand has 45 states, 45 states have (on average 3.2) internal successors, (144), 45 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:34,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:34,481 INFO L93 Difference]: Finished difference Result 331 states and 340 transitions. [2021-08-21 18:40:34,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-08-21 18:40:34,481 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.2) internal successors, (144), 45 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-08-21 18:40:34,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:34,482 INFO L225 Difference]: With dead ends: 331 [2021-08-21 18:40:34,482 INFO L226 Difference]: Without dead ends: 205 [2021-08-21 18:40:34,482 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 747.5ms TimeCoverageRelationStatistics Valid=854, Invalid=2686, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 18:40:34,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2021-08-21 18:40:34,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 203. [2021-08-21 18:40:34,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.0495049504950495) internal successors, (212), 202 states have internal predecessors, (212), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:34,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 212 transitions. [2021-08-21 18:40:34,484 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 212 transitions. Word has length 103 [2021-08-21 18:40:34,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:34,484 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 212 transitions. [2021-08-21 18:40:34,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.2) internal successors, (144), 45 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:34,485 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 212 transitions. [2021-08-21 18:40:34,485 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-08-21 18:40:34,485 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:34,485 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 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 18:40:34,513 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 18:40:34,708 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-08-21 18:40:34,709 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:34,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:34,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1047322772, now seen corresponding path program 53 times [2021-08-21 18:40:34,709 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:34,709 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248984222] [2021-08-21 18:40:34,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:34,709 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:34,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:35,509 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:35,509 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:35,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248984222] [2021-08-21 18:40:35,509 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1248984222] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:35,509 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617128953] [2021-08-21 18:40:35,509 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:40:35,509 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:35,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:35,511 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 18:40:35,512 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 18:40:38,286 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 15 check-sat command(s) [2021-08-21 18:40:38,286 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:38,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-21 18:40:38,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:39,984 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:40:39,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 33 [2021-08-21 18:40:40,023 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:40,023 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617128953] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:40,023 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:40,023 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 52 [2021-08-21 18:40:40,023 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086676759] [2021-08-21 18:40:40,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-08-21 18:40:40,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:40,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-08-21 18:40:40,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=179, Invalid=2577, Unknown=0, NotChecked=0, Total=2756 [2021-08-21 18:40:40,024 INFO L87 Difference]: Start difference. First operand 203 states and 212 transitions. Second operand has 53 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:40,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:40,755 INFO L93 Difference]: Finished difference Result 364 states and 383 transitions. [2021-08-21 18:40:40,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 18:40:40,755 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-08-21 18:40:40,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:40,756 INFO L225 Difference]: With dead ends: 364 [2021-08-21 18:40:40,756 INFO L226 Difference]: Without dead ends: 349 [2021-08-21 18:40:40,756 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 88 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1356.7ms TimeCoverageRelationStatistics Valid=190, Invalid=2780, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:40:40,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-08-21 18:40:40,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 211. [2021-08-21 18:40:40,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.0571428571428572) internal successors, (222), 210 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:40,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 222 transitions. [2021-08-21 18:40:40,759 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 222 transitions. Word has length 106 [2021-08-21 18:40:40,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:40,759 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 222 transitions. [2021-08-21 18:40:40,759 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.9622641509433962) internal successors, (157), 52 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:40,759 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 222 transitions. [2021-08-21 18:40:40,759 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-08-21 18:40:40,759 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:40,759 INFO L512 BasicCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 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 18:40:40,787 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-08-21 18:40:40,972 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,55 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:40,973 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:40,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:40,973 INFO L82 PathProgramCache]: Analyzing trace with hash 1703650194, now seen corresponding path program 54 times [2021-08-21 18:40:40,973 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:40,973 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96648340] [2021-08-21 18:40:40,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:40,973 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:40,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:41,844 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:41,845 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:41,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96648340] [2021-08-21 18:40:41,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96648340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:41,845 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1000907067] [2021-08-21 18:40:41,845 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:40:41,845 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:41,845 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:41,846 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 18:40:41,846 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 18:40:44,714 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-08-21 18:40:44,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:44,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 70 conjunts are in the unsatisfiable core [2021-08-21 18:40:44,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:46,376 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 18:40:46,376 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 37 [2021-08-21 18:40:46,398 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 0 proven. 574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:46,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1000907067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:46,398 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:46,398 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 51 [2021-08-21 18:40:46,399 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1601373140] [2021-08-21 18:40:46,399 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-08-21 18:40:46,399 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:46,399 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-08-21 18:40:46,399 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=2506, Unknown=0, NotChecked=0, Total=2652 [2021-08-21 18:40:46,400 INFO L87 Difference]: Start difference. First operand 211 states and 222 transitions. Second operand has 52 states, 52 states have (on average 3.0) internal successors, (156), 51 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:46,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:46,985 INFO L93 Difference]: Finished difference Result 371 states and 391 transitions. [2021-08-21 18:40:46,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 18:40:46,985 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 3.0) internal successors, (156), 51 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-08-21 18:40:46,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:46,987 INFO L225 Difference]: With dead ends: 371 [2021-08-21 18:40:46,987 INFO L226 Difference]: Without dead ends: 356 [2021-08-21 18:40:46,987 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 88 SyntacticMatches, 2 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 706 ImplicationChecksByTransitivity, 1205.8ms TimeCoverageRelationStatistics Valid=156, Invalid=2706, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 18:40:46,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 356 states. [2021-08-21 18:40:46,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 356 to 221. [2021-08-21 18:40:46,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.059090909090909) internal successors, (233), 220 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:46,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 233 transitions. [2021-08-21 18:40:46,993 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 233 transitions. Word has length 106 [2021-08-21 18:40:46,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:46,993 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 233 transitions. [2021-08-21 18:40:46,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 3.0) internal successors, (156), 51 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:46,993 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 233 transitions. [2021-08-21 18:40:46,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-08-21 18:40:46,994 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:46,994 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 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 18:40:47,019 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-08-21 18:40:47,199 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,56 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:47,200 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:47,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:47,200 INFO L82 PathProgramCache]: Analyzing trace with hash 2003794182, now seen corresponding path program 55 times [2021-08-21 18:40:47,200 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:47,200 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813940972] [2021-08-21 18:40:47,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:47,200 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:47,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:47,568 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 287 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:47,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:47,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813940972] [2021-08-21 18:40:47,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813940972] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:47,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909574683] [2021-08-21 18:40:47,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:40:47,569 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:47,569 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:47,569 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 18:40:47,570 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 18:40:50,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:50,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:40:50,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:51,219 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 287 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:51,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909574683] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:51,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:51,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 48 [2021-08-21 18:40:51,219 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [380719543] [2021-08-21 18:40:51,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-21 18:40:51,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:51,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-21 18:40:51,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:40:51,220 INFO L87 Difference]: Start difference. First operand 221 states and 233 transitions. Second operand has 48 states, 48 states have (on average 3.1875) internal successors, (153), 48 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:51,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:51,611 INFO L93 Difference]: Finished difference Result 384 states and 402 transitions. [2021-08-21 18:40:51,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-08-21 18:40:51,612 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.1875) internal successors, (153), 48 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-08-21 18:40:51,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:51,613 INFO L225 Difference]: With dead ends: 384 [2021-08-21 18:40:51,613 INFO L226 Difference]: Without dead ends: 384 [2021-08-21 18:40:51,613 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 159 GetRequests, 94 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1138 ImplicationChecksByTransitivity, 746.4ms TimeCoverageRelationStatistics Valid=1260, Invalid=3030, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 18:40:51,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 384 states. [2021-08-21 18:40:51,615 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 384 to 212. [2021-08-21 18:40:51,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.04739336492891) internal successors, (221), 211 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:51,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 221 transitions. [2021-08-21 18:40:51,615 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 221 transitions. Word has length 109 [2021-08-21 18:40:51,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:51,615 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 221 transitions. [2021-08-21 18:40:51,616 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.1875) internal successors, (153), 48 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:51,616 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 221 transitions. [2021-08-21 18:40:51,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-08-21 18:40:51,616 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:51,616 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 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 18:40:51,640 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-08-21 18:40:51,820 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-08-21 18:40:51,821 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:51,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:51,821 INFO L82 PathProgramCache]: Analyzing trace with hash -219082370, now seen corresponding path program 56 times [2021-08-21 18:40:51,821 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:51,821 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897665546] [2021-08-21 18:40:51,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:51,821 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:51,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:52,245 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 330 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:52,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:52,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897665546] [2021-08-21 18:40:52,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897665546] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:52,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408312984] [2021-08-21 18:40:52,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:40:52,245 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:52,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:52,246 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 18:40:52,247 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 18:40:55,337 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:40:55,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:40:55,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 199 conjuncts, 32 conjunts are in the unsatisfiable core [2021-08-21 18:40:55,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:40:56,062 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 330 proven. 287 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:56,063 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408312984] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:56,063 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:40:56,063 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 48 [2021-08-21 18:40:56,063 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135868108] [2021-08-21 18:40:56,063 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-08-21 18:40:56,063 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:40:56,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-08-21 18:40:56,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=543, Invalid=1713, Unknown=0, NotChecked=0, Total=2256 [2021-08-21 18:40:56,064 INFO L87 Difference]: Start difference. First operand 212 states and 221 transitions. Second operand has 48 states, 48 states have (on average 3.1875) internal successors, (153), 48 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:56,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:40:56,417 INFO L93 Difference]: Finished difference Result 352 states and 361 transitions. [2021-08-21 18:40:56,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-08-21 18:40:56,417 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 3.1875) internal successors, (153), 48 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-08-21 18:40:56,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:40:56,418 INFO L225 Difference]: With dead ends: 352 [2021-08-21 18:40:56,418 INFO L226 Difference]: Without dead ends: 217 [2021-08-21 18:40:56,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 750 ImplicationChecksByTransitivity, 911.7ms TimeCoverageRelationStatistics Valid=967, Invalid=3065, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 18:40:56,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2021-08-21 18:40:56,420 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 215. [2021-08-21 18:40:56,420 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.0467289719626167) internal successors, (224), 214 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:56,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 224 transitions. [2021-08-21 18:40:56,420 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 224 transitions. Word has length 109 [2021-08-21 18:40:56,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:40:56,420 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 224 transitions. [2021-08-21 18:40:56,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 3.1875) internal successors, (153), 48 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:40:56,420 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 224 transitions. [2021-08-21 18:40:56,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-08-21 18:40:56,421 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:40:56,421 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 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 18:40:56,449 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 18:40:56,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,58 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:56,633 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:40:56,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:40:56,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1213208996, now seen corresponding path program 57 times [2021-08-21 18:40:56,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:40:56,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [719566099] [2021-08-21 18:40:56,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:40:56,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:40:56,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:40:57,505 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:40:57,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:40:57,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [719566099] [2021-08-21 18:40:57,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [719566099] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:40:57,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086355962] [2021-08-21 18:40:57,506 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:40:57,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:40:57,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:40:57,510 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 18:40:57,511 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 18:41:00,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-08-21 18:41:00,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:00,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 74 conjunts are in the unsatisfiable core [2021-08-21 18:41:00,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:02,386 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:41:02,387 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 33 [2021-08-21 18:41:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:02,410 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1086355962] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:02,410 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:02,410 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 55 [2021-08-21 18:41:02,410 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [361366530] [2021-08-21 18:41:02,410 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-08-21 18:41:02,410 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:02,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-08-21 18:41:02,411 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=2890, Unknown=0, NotChecked=0, Total=3080 [2021-08-21 18:41:02,411 INFO L87 Difference]: Start difference. First operand 215 states and 224 transitions. Second operand has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 55 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:03,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:03,149 INFO L93 Difference]: Finished difference Result 385 states and 404 transitions. [2021-08-21 18:41:03,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:41:03,149 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 55 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-08-21 18:41:03,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:03,150 INFO L225 Difference]: With dead ends: 385 [2021-08-21 18:41:03,150 INFO L226 Difference]: Without dead ends: 370 [2021-08-21 18:41:03,150 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 93 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 380 ImplicationChecksByTransitivity, 1491.2ms TimeCoverageRelationStatistics Valid=201, Invalid=3105, Unknown=0, NotChecked=0, Total=3306 [2021-08-21 18:41:03,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 370 states. [2021-08-21 18:41:03,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 370 to 223. [2021-08-21 18:41:03,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.054054054054054) internal successors, (234), 222 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:03,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 234 transitions. [2021-08-21 18:41:03,152 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 234 transitions. Word has length 112 [2021-08-21 18:41:03,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:03,152 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 234 transitions. [2021-08-21 18:41:03,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.9642857142857144) internal successors, (166), 55 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:03,153 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 234 transitions. [2021-08-21 18:41:03,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-08-21 18:41:03,153 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:03,153 INFO L512 BasicCegarLoop]: trace histogram [15, 15, 15, 15, 15, 15, 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 18:41:03,180 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 18:41:03,372 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-08-21 18:41:03,372 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:03,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:03,373 INFO L82 PathProgramCache]: Analyzing trace with hash 798865460, now seen corresponding path program 58 times [2021-08-21 18:41:03,373 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:03,373 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130513943] [2021-08-21 18:41:03,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:03,373 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:04,242 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:04,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:04,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130513943] [2021-08-21 18:41:04,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130513943] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:04,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077462278] [2021-08-21 18:41:04,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:41:04,242 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:04,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:04,243 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 18:41:04,244 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 18:41:07,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:41:07,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:07,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 74 conjunts are in the unsatisfiable core [2021-08-21 18:41:07,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:09,178 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 18:41:09,178 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 37 [2021-08-21 18:41:09,200 INFO L134 CoverageAnalysis]: Checked inductivity of 660 backedges. 0 proven. 660 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:09,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077462278] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:09,201 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:09,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 54 [2021-08-21 18:41:09,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1850398304] [2021-08-21 18:41:09,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-08-21 18:41:09,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:09,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-08-21 18:41:09,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=155, Invalid=2815, Unknown=0, NotChecked=0, Total=2970 [2021-08-21 18:41:09,202 INFO L87 Difference]: Start difference. First operand 223 states and 234 transitions. Second operand has 55 states, 55 states have (on average 3.0) internal successors, (165), 54 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:09,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:09,981 INFO L93 Difference]: Finished difference Result 392 states and 412 transitions. [2021-08-21 18:41:09,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:41:09,982 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.0) internal successors, (165), 54 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 112 [2021-08-21 18:41:09,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:09,983 INFO L225 Difference]: With dead ends: 392 [2021-08-21 18:41:09,983 INFO L226 Difference]: Without dead ends: 377 [2021-08-21 18:41:09,983 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 93 SyntacticMatches, 2 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 793 ImplicationChecksByTransitivity, 1268.2ms TimeCoverageRelationStatistics Valid=165, Invalid=3027, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 18:41:09,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 377 states. [2021-08-21 18:41:09,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 377 to 233. [2021-08-21 18:41:09,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.0560344827586208) internal successors, (245), 232 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:09,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 245 transitions. [2021-08-21 18:41:09,986 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 245 transitions. Word has length 112 [2021-08-21 18:41:09,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:09,986 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 245 transitions. [2021-08-21 18:41:09,986 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.0) internal successors, (165), 54 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:09,986 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 245 transitions. [2021-08-21 18:41:09,987 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-21 18:41:09,987 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:09,987 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 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 18:41:10,011 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 18:41:10,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 60 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-08-21 18:41:10,197 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:10,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:10,198 INFO L82 PathProgramCache]: Analyzing trace with hash 105207742, now seen corresponding path program 59 times [2021-08-21 18:41:10,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:10,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520956715] [2021-08-21 18:41:10,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:10,198 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:10,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:10,592 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 330 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:10,592 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:10,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520956715] [2021-08-21 18:41:10,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520956715] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:10,593 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943769713] [2021-08-21 18:41:10,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:41:10,593 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:10,593 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:10,593 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 18:41:10,594 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 18:41:13,911 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-08-21 18:41:13,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:13,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:41:13,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 330 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:14,567 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943769713] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:14,567 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:14,567 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 51 [2021-08-21 18:41:14,567 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290661021] [2021-08-21 18:41:14,567 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-21 18:41:14,567 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:14,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-21 18:41:14,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=1939, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:41:14,568 INFO L87 Difference]: Start difference. First operand 233 states and 245 transitions. Second operand has 51 states, 51 states have (on average 3.176470588235294) internal successors, (162), 51 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:14,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:14,999 INFO L93 Difference]: Finished difference Result 405 states and 423 transitions. [2021-08-21 18:41:15,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-08-21 18:41:15,000 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.176470588235294) internal successors, (162), 51 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-08-21 18:41:15,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:15,001 INFO L225 Difference]: With dead ends: 405 [2021-08-21 18:41:15,001 INFO L226 Difference]: Without dead ends: 405 [2021-08-21 18:41:15,001 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1294 ImplicationChecksByTransitivity, 799.8ms TimeCoverageRelationStatistics Valid=1415, Invalid=3415, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 18:41:15,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 405 states. [2021-08-21 18:41:15,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 405 to 224. [2021-08-21 18:41:15,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.0448430493273542) internal successors, (233), 223 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:15,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 233 transitions. [2021-08-21 18:41:15,004 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 233 transitions. Word has length 115 [2021-08-21 18:41:15,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:15,004 INFO L470 AbstractCegarLoop]: Abstraction has 224 states and 233 transitions. [2021-08-21 18:41:15,004 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.176470588235294) internal successors, (162), 51 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:15,004 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 233 transitions. [2021-08-21 18:41:15,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2021-08-21 18:41:15,005 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:15,005 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 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 18:41:15,030 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-08-21 18:41:15,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,61 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:15,205 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:15,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:15,206 INFO L82 PathProgramCache]: Analyzing trace with hash -1804383162, now seen corresponding path program 60 times [2021-08-21 18:41:15,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:15,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69580347] [2021-08-21 18:41:15,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:15,206 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:15,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:15,637 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 376 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:15,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:15,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69580347] [2021-08-21 18:41:15,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [69580347] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:15,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893883351] [2021-08-21 18:41:15,637 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:41:15,638 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:15,638 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:15,639 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 18:41:15,639 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 18:41:19,071 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2021-08-21 18:41:19,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:19,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 34 conjunts are in the unsatisfiable core [2021-08-21 18:41:19,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:19,855 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 376 proven. 330 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:19,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893883351] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:19,855 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:19,856 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 51 [2021-08-21 18:41:19,856 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103992655] [2021-08-21 18:41:19,856 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-08-21 18:41:19,856 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:19,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-08-21 18:41:19,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=1939, Unknown=0, NotChecked=0, Total=2550 [2021-08-21 18:41:19,856 INFO L87 Difference]: Start difference. First operand 224 states and 233 transitions. Second operand has 51 states, 51 states have (on average 3.176470588235294) internal successors, (162), 51 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:20,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:20,247 INFO L93 Difference]: Finished difference Result 373 states and 382 transitions. [2021-08-21 18:41:20,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-08-21 18:41:20,247 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 3.176470588235294) internal successors, (162), 51 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 115 [2021-08-21 18:41:20,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:20,248 INFO L225 Difference]: With dead ends: 373 [2021-08-21 18:41:20,248 INFO L226 Difference]: Without dead ends: 229 [2021-08-21 18:41:20,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 856 ImplicationChecksByTransitivity, 964.8ms TimeCoverageRelationStatistics Valid=1087, Invalid=3469, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 18:41:20,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-08-21 18:41:20,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 227. [2021-08-21 18:41:20,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.0442477876106195) internal successors, (236), 226 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:20,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 236 transitions. [2021-08-21 18:41:20,250 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 236 transitions. Word has length 115 [2021-08-21 18:41:20,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:20,250 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 236 transitions. [2021-08-21 18:41:20,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 3.176470588235294) internal successors, (162), 51 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:20,250 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 236 transitions. [2021-08-21 18:41:20,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-08-21 18:41:20,251 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:20,251 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 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 18:41:20,277 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 18:41:20,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,62 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:20,477 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:20,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:20,478 INFO L82 PathProgramCache]: Analyzing trace with hash 848895980, now seen corresponding path program 61 times [2021-08-21 18:41:20,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:20,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866016333] [2021-08-21 18:41:20,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:20,478 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:21,462 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:21,462 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:21,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866016333] [2021-08-21 18:41:21,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866016333] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:21,462 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942819530] [2021-08-21 18:41:21,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:41:21,462 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:21,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:21,464 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 18:41:21,465 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 18:41:24,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:24,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 78 conjunts are in the unsatisfiable core [2021-08-21 18:41:24,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:26,869 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:41:26,869 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 65 treesize of output 39 [2021-08-21 18:41:26,895 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:26,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942819530] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:26,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:26,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 58 [2021-08-21 18:41:26,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622407987] [2021-08-21 18:41:26,896 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-08-21 18:41:26,896 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:26,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-08-21 18:41:26,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=201, Invalid=3221, Unknown=0, NotChecked=0, Total=3422 [2021-08-21 18:41:26,897 INFO L87 Difference]: Start difference. First operand 227 states and 236 transitions. Second operand has 59 states, 59 states have (on average 2.9661016949152543) internal successors, (175), 58 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:27,634 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:27,634 INFO L93 Difference]: Finished difference Result 406 states and 425 transitions. [2021-08-21 18:41:27,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:41:27,635 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.9661016949152543) internal successors, (175), 58 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-08-21 18:41:27,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:27,635 INFO L225 Difference]: With dead ends: 406 [2021-08-21 18:41:27,636 INFO L226 Difference]: Without dead ends: 391 [2021-08-21 18:41:27,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 98 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 412 ImplicationChecksByTransitivity, 1688.1ms TimeCoverageRelationStatistics Valid=212, Invalid=3448, Unknown=0, NotChecked=0, Total=3660 [2021-08-21 18:41:27,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 391 states. [2021-08-21 18:41:27,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 391 to 235. [2021-08-21 18:41:27,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.0512820512820513) internal successors, (246), 234 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:27,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 246 transitions. [2021-08-21 18:41:27,638 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 246 transitions. Word has length 118 [2021-08-21 18:41:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:27,638 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 246 transitions. [2021-08-21 18:41:27,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.9661016949152543) internal successors, (175), 58 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:27,638 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 246 transitions. [2021-08-21 18:41:27,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-08-21 18:41:27,639 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:27,639 INFO L512 BasicCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 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 18:41:27,666 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 18:41:27,855 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-08-21 18:41:27,855 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:27,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:27,855 INFO L82 PathProgramCache]: Analyzing trace with hash -1502374958, now seen corresponding path program 62 times [2021-08-21 18:41:27,855 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:27,855 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974909809] [2021-08-21 18:41:27,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:27,855 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:27,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:28,929 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:28,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:28,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974909809] [2021-08-21 18:41:28,930 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974909809] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:28,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873184018] [2021-08-21 18:41:28,930 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:41:28,930 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:28,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:28,931 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 18:41:28,931 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 18:41:32,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:41:32,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:32,464 INFO L263 TraceCheckSpWp]: Trace formula consists of 214 conjuncts, 80 conjunts are in the unsatisfiable core [2021-08-21 18:41:32,465 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:34,218 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:41:34,219 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 67 treesize of output 39 [2021-08-21 18:41:34,266 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 0 proven. 752 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:34,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873184018] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:34,266 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:34,266 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 40] total 59 [2021-08-21 18:41:34,267 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1098102943] [2021-08-21 18:41:34,267 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-08-21 18:41:34,267 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:34,267 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-08-21 18:41:34,267 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=3387, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 18:41:34,267 INFO L87 Difference]: Start difference. First operand 235 states and 246 transitions. Second operand has 60 states, 60 states have (on average 2.9166666666666665) internal successors, (175), 59 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:36,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:36,016 INFO L93 Difference]: Finished difference Result 428 states and 451 transitions. [2021-08-21 18:41:36,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 18:41:36,017 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.9166666666666665) internal successors, (175), 59 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 118 [2021-08-21 18:41:36,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:36,018 INFO L225 Difference]: With dead ends: 428 [2021-08-21 18:41:36,018 INFO L226 Difference]: Without dead ends: 413 [2021-08-21 18:41:36,018 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 97 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1257 ImplicationChecksByTransitivity, 2339.4ms TimeCoverageRelationStatistics Valid=288, Invalid=5874, Unknown=0, NotChecked=0, Total=6162 [2021-08-21 18:41:36,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 413 states. [2021-08-21 18:41:36,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 413 to 245. [2021-08-21 18:41:36,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0532786885245902) internal successors, (257), 244 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:36,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 257 transitions. [2021-08-21 18:41:36,021 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 257 transitions. Word has length 118 [2021-08-21 18:41:36,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:36,021 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 257 transitions. [2021-08-21 18:41:36,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.9166666666666665) internal successors, (175), 59 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:36,021 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 257 transitions. [2021-08-21 18:41:36,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-08-21 18:41:36,021 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:36,021 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 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 18:41:36,048 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 18:41:36,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-08-21 18:41:36,222 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:36,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:36,222 INFO L82 PathProgramCache]: Analyzing trace with hash 109699718, now seen corresponding path program 63 times [2021-08-21 18:41:36,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:36,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040684890] [2021-08-21 18:41:36,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:36,223 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:36,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:36,675 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 376 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:36,675 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:36,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040684890] [2021-08-21 18:41:36,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040684890] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:36,675 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880611454] [2021-08-21 18:41:36,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:41:36,675 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:36,676 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:36,676 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 18:41:36,677 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 18:41:40,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-08-21 18:41:40,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:40,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 18:41:40,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:41,124 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 376 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:41,125 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880611454] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:41,125 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:41,125 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 54 [2021-08-21 18:41:41,125 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000798749] [2021-08-21 18:41:41,125 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-21 18:41:41,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:41,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-21 18:41:41,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 18:41:41,126 INFO L87 Difference]: Start difference. First operand 245 states and 257 transitions. Second operand has 54 states, 54 states have (on average 3.1666666666666665) internal successors, (171), 54 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:41,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:41,557 INFO L93 Difference]: Finished difference Result 426 states and 444 transitions. [2021-08-21 18:41:41,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-08-21 18:41:41,557 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.1666666666666665) internal successors, (171), 54 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-08-21 18:41:41,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:41,558 INFO L225 Difference]: With dead ends: 426 [2021-08-21 18:41:41,558 INFO L226 Difference]: Without dead ends: 426 [2021-08-21 18:41:41,558 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 104 SyntacticMatches, 1 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1460 ImplicationChecksByTransitivity, 894.3ms TimeCoverageRelationStatistics Valid=1579, Invalid=3823, Unknown=0, NotChecked=0, Total=5402 [2021-08-21 18:41:41,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 426 states. [2021-08-21 18:41:41,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 426 to 236. [2021-08-21 18:41:41,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 236 states, 235 states have (on average 1.0425531914893618) internal successors, (245), 235 states have internal predecessors, (245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:41,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 236 states to 236 states and 245 transitions. [2021-08-21 18:41:41,561 INFO L78 Accepts]: Start accepts. Automaton has 236 states and 245 transitions. Word has length 121 [2021-08-21 18:41:41,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:41,561 INFO L470 AbstractCegarLoop]: Abstraction has 236 states and 245 transitions. [2021-08-21 18:41:41,561 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.1666666666666665) internal successors, (171), 54 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:41,561 INFO L276 IsEmpty]: Start isEmpty. Operand 236 states and 245 transitions. [2021-08-21 18:41:41,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-08-21 18:41:41,561 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:41,561 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 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 18:41:41,588 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 18:41:41,771 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,65 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:41,771 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:41,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:41,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1671085826, now seen corresponding path program 64 times [2021-08-21 18:41:41,771 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:41,771 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [72950257] [2021-08-21 18:41:41,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:41,772 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:41,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:42,224 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 425 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:42,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:42,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [72950257] [2021-08-21 18:41:42,224 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [72950257] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:42,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595045151] [2021-08-21 18:41:42,224 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:41:42,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:42,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:42,225 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 18:41:42,249 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 18:41:45,977 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:41:45,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:45,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 36 conjunts are in the unsatisfiable core [2021-08-21 18:41:45,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:46,849 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 425 proven. 376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:46,849 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595045151] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:46,849 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:46,849 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 54 [2021-08-21 18:41:46,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [170755435] [2021-08-21 18:41:46,850 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-08-21 18:41:46,850 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:46,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-08-21 18:41:46,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=2179, Unknown=0, NotChecked=0, Total=2862 [2021-08-21 18:41:46,850 INFO L87 Difference]: Start difference. First operand 236 states and 245 transitions. Second operand has 54 states, 54 states have (on average 3.1666666666666665) internal successors, (171), 54 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:47,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:47,256 INFO L93 Difference]: Finished difference Result 394 states and 403 transitions. [2021-08-21 18:41:47,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-08-21 18:41:47,256 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 3.1666666666666665) internal successors, (171), 54 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-08-21 18:41:47,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:47,257 INFO L225 Difference]: With dead ends: 394 [2021-08-21 18:41:47,257 INFO L226 Difference]: Without dead ends: 241 [2021-08-21 18:41:47,258 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 969 ImplicationChecksByTransitivity, 1076.3ms TimeCoverageRelationStatistics Valid=1214, Invalid=3898, Unknown=0, NotChecked=0, Total=5112 [2021-08-21 18:41:47,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2021-08-21 18:41:47,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 239. [2021-08-21 18:41:47,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.0420168067226891) internal successors, (248), 238 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:47,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 248 transitions. [2021-08-21 18:41:47,260 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 248 transitions. Word has length 121 [2021-08-21 18:41:47,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:47,260 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 248 transitions. [2021-08-21 18:41:47,260 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 3.1666666666666665) internal successors, (171), 54 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:47,260 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 248 transitions. [2021-08-21 18:41:47,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-08-21 18:41:47,260 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:47,260 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 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 18:41:47,286 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 18:41:47,470 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-08-21 18:41:47,470 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:47,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:47,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1525366820, now seen corresponding path program 65 times [2021-08-21 18:41:47,471 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:47,471 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122886272] [2021-08-21 18:41:47,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:47,471 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:47,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:48,537 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:48,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:48,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122886272] [2021-08-21 18:41:48,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2122886272] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:48,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [431038264] [2021-08-21 18:41:48,538 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:41:48,538 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:48,538 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:48,539 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 18:41:48,539 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 18:41:52,355 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-08-21 18:41:52,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:41:52,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 82 conjunts are in the unsatisfiable core [2021-08-21 18:41:52,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:41:54,455 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:41:54,456 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 33 [2021-08-21 18:41:54,491 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:54,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [431038264] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:54,491 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:41:54,491 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 61 [2021-08-21 18:41:54,491 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083124495] [2021-08-21 18:41:54,492 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-08-21 18:41:54,492 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:41:54,492 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-08-21 18:41:54,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=212, Invalid=3570, Unknown=0, NotChecked=0, Total=3782 [2021-08-21 18:41:54,492 INFO L87 Difference]: Start difference. First operand 239 states and 248 transitions. Second operand has 62 states, 62 states have (on average 2.967741935483871) internal successors, (184), 61 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:55,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:41:55,337 INFO L93 Difference]: Finished difference Result 427 states and 446 transitions. [2021-08-21 18:41:55,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 18:41:55,337 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.967741935483871) internal successors, (184), 61 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-08-21 18:41:55,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:41:55,338 INFO L225 Difference]: With dead ends: 427 [2021-08-21 18:41:55,338 INFO L226 Difference]: Without dead ends: 412 [2021-08-21 18:41:55,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 103 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 445 ImplicationChecksByTransitivity, 1832.3ms TimeCoverageRelationStatistics Valid=223, Invalid=3809, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 18:41:55,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 412 states. [2021-08-21 18:41:55,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 412 to 247. [2021-08-21 18:41:55,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.048780487804878) internal successors, (258), 246 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:55,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 258 transitions. [2021-08-21 18:41:55,341 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 258 transitions. Word has length 124 [2021-08-21 18:41:55,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:41:55,341 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 258 transitions. [2021-08-21 18:41:55,341 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.967741935483871) internal successors, (184), 61 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:41:55,341 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 258 transitions. [2021-08-21 18:41:55,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-08-21 18:41:55,341 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:41:55,342 INFO L512 BasicCegarLoop]: trace histogram [17, 17, 17, 17, 17, 17, 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 18:41:55,368 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 18:41:55,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-08-21 18:41:55,544 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:41:55,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:41:55,544 INFO L82 PathProgramCache]: Analyzing trace with hash -944515340, now seen corresponding path program 66 times [2021-08-21 18:41:55,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:41:55,544 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558365568] [2021-08-21 18:41:55,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:41:55,544 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:41:55,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:41:56,635 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:41:56,635 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:41:56,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558365568] [2021-08-21 18:41:56,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [558365568] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:41:56,635 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891624036] [2021-08-21 18:41:56,635 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:41:56,635 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:41:56,635 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:41:56,636 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 18:41:56,636 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 18:42:00,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 18 check-sat command(s) [2021-08-21 18:42:00,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:42:00,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 84 conjunts are in the unsatisfiable core [2021-08-21 18:42:00,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:02,520 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:42:02,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-21 18:42:02,549 INFO L134 CoverageAnalysis]: Checked inductivity of 850 backedges. 0 proven. 850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:02,549 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891624036] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:02,549 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:42:02,549 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42] total 62 [2021-08-21 18:42:02,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318062874] [2021-08-21 18:42:02,550 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-08-21 18:42:02,550 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:42:02,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-08-21 18:42:02,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=161, Invalid=3745, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 18:42:02,551 INFO L87 Difference]: Start difference. First operand 247 states and 258 transitions. Second operand has 63 states, 63 states have (on average 2.9206349206349205) internal successors, (184), 62 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:04,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:42:04,205 INFO L93 Difference]: Finished difference Result 449 states and 472 transitions. [2021-08-21 18:42:04,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 18:42:04,206 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.9206349206349205) internal successors, (184), 62 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 124 [2021-08-21 18:42:04,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:42:04,207 INFO L225 Difference]: With dead ends: 449 [2021-08-21 18:42:04,207 INFO L226 Difference]: Without dead ends: 434 [2021-08-21 18:42:04,207 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 102 SyntacticMatches, 1 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1394 ImplicationChecksByTransitivity, 2392.6ms TimeCoverageRelationStatistics Valid=303, Invalid=6503, Unknown=0, NotChecked=0, Total=6806 [2021-08-21 18:42:04,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 434 states. [2021-08-21 18:42:04,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 434 to 257. [2021-08-21 18:42:04,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.05078125) internal successors, (269), 256 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:04,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 269 transitions. [2021-08-21 18:42:04,210 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 269 transitions. Word has length 124 [2021-08-21 18:42:04,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:42:04,210 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 269 transitions. [2021-08-21 18:42:04,210 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.9206349206349205) internal successors, (184), 62 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:04,210 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 269 transitions. [2021-08-21 18:42:04,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-08-21 18:42:04,215 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:42:04,215 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 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 18:42:04,242 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 18:42:04,415 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,68 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:04,415 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:42:04,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:42:04,416 INFO L82 PathProgramCache]: Analyzing trace with hash -968743106, now seen corresponding path program 67 times [2021-08-21 18:42:04,416 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:42:04,416 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011407986] [2021-08-21 18:42:04,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:42:04,416 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:42:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:04,916 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 425 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:04,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:42:04,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011407986] [2021-08-21 18:42:04,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2011407986] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:04,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2101707622] [2021-08-21 18:42:04,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:42:04,917 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:04,917 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:42:04,917 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 18:42:04,918 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 18:42:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:08,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 18:42:08,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:09,765 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 425 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:09,765 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2101707622] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:09,765 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:42:09,765 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 57 [2021-08-21 18:42:09,765 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555036764] [2021-08-21 18:42:09,766 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-08-21 18:42:09,766 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:42:09,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-08-21 18:42:09,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=759, Invalid=2433, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 18:42:09,766 INFO L87 Difference]: Start difference. First operand 257 states and 269 transitions. Second operand has 57 states, 57 states have (on average 3.1578947368421053) internal successors, (180), 57 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:10,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:42:10,272 INFO L93 Difference]: Finished difference Result 447 states and 465 transitions. [2021-08-21 18:42:10,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-08-21 18:42:10,272 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.1578947368421053) internal successors, (180), 57 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-08-21 18:42:10,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:42:10,273 INFO L225 Difference]: With dead ends: 447 [2021-08-21 18:42:10,273 INFO L226 Difference]: Without dead ends: 447 [2021-08-21 18:42:10,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 109 SyntacticMatches, 1 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1636 ImplicationChecksByTransitivity, 1007.4ms TimeCoverageRelationStatistics Valid=1752, Invalid=4254, Unknown=0, NotChecked=0, Total=6006 [2021-08-21 18:42:10,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 447 states. [2021-08-21 18:42:10,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 447 to 248. [2021-08-21 18:42:10,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 248 states, 247 states have (on average 1.040485829959514) internal successors, (257), 247 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:10,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 248 states to 248 states and 257 transitions. [2021-08-21 18:42:10,276 INFO L78 Accepts]: Start accepts. Automaton has 248 states and 257 transitions. Word has length 127 [2021-08-21 18:42:10,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:42:10,277 INFO L470 AbstractCegarLoop]: Abstraction has 248 states and 257 transitions. [2021-08-21 18:42:10,277 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.1578947368421053) internal successors, (180), 57 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:10,277 INFO L276 IsEmpty]: Start isEmpty. Operand 248 states and 257 transitions. [2021-08-21 18:42:10,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2021-08-21 18:42:10,277 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:42:10,277 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 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 18:42:10,304 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 18:42:10,478 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable71 [2021-08-21 18:42:10,478 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:42:10,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:42:10,478 INFO L82 PathProgramCache]: Analyzing trace with hash -914844218, now seen corresponding path program 68 times [2021-08-21 18:42:10,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:42:10,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355154674] [2021-08-21 18:42:10,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:42:10,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:42:10,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:11,000 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 477 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:11,000 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:42:11,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355154674] [2021-08-21 18:42:11,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355154674] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:11,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662004067] [2021-08-21 18:42:11,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:42:11,000 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:11,001 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:42:11,001 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 18:42:11,002 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 18:42:15,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:42:15,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:42:15,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 38 conjunts are in the unsatisfiable core [2021-08-21 18:42:15,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:16,061 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 477 proven. 425 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:16,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [662004067] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:16,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:42:16,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 57 [2021-08-21 18:42:16,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625883155] [2021-08-21 18:42:16,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-08-21 18:42:16,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:42:16,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-08-21 18:42:16,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=759, Invalid=2433, Unknown=0, NotChecked=0, Total=3192 [2021-08-21 18:42:16,063 INFO L87 Difference]: Start difference. First operand 248 states and 257 transitions. Second operand has 57 states, 57 states have (on average 3.1578947368421053) internal successors, (180), 57 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:16,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:42:16,542 INFO L93 Difference]: Finished difference Result 415 states and 424 transitions. [2021-08-21 18:42:16,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-08-21 18:42:16,542 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 3.1578947368421053) internal successors, (180), 57 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 127 [2021-08-21 18:42:16,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:42:16,543 INFO L225 Difference]: With dead ends: 415 [2021-08-21 18:42:16,543 INFO L226 Difference]: Without dead ends: 253 [2021-08-21 18:42:16,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 1199.1ms TimeCoverageRelationStatistics Valid=1348, Invalid=4352, Unknown=0, NotChecked=0, Total=5700 [2021-08-21 18:42:16,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2021-08-21 18:42:16,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 251. [2021-08-21 18:42:16,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.04) internal successors, (260), 250 states have internal predecessors, (260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:16,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 260 transitions. [2021-08-21 18:42:16,546 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 260 transitions. Word has length 127 [2021-08-21 18:42:16,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:42:16,546 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 260 transitions. [2021-08-21 18:42:16,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 3.1578947368421053) internal successors, (180), 57 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:16,546 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 260 transitions. [2021-08-21 18:42:16,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-08-21 18:42:16,546 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:42:16,546 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 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 18:42:16,574 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 18:42:16,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,70 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:16,757 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:42:16,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:42:16,768 INFO L82 PathProgramCache]: Analyzing trace with hash -9428884, now seen corresponding path program 69 times [2021-08-21 18:42:16,768 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:42:16,768 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [992484071] [2021-08-21 18:42:16,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:42:16,768 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:42:16,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:17,950 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:17,950 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:42:17,950 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [992484071] [2021-08-21 18:42:17,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [992484071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:17,951 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481380023] [2021-08-21 18:42:17,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:42:17,951 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:17,951 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:42:17,951 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 18:42:17,952 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 18:42:22,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2021-08-21 18:42:22,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:42:22,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 86 conjunts are in the unsatisfiable core [2021-08-21 18:42:22,200 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:24,427 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:42:24,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 33 [2021-08-21 18:42:24,451 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:24,451 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [481380023] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:24,451 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:42:24,452 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 64 [2021-08-21 18:42:24,452 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451892519] [2021-08-21 18:42:24,452 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-08-21 18:42:24,452 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:42:24,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-08-21 18:42:24,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=3937, Unknown=0, NotChecked=0, Total=4160 [2021-08-21 18:42:24,452 INFO L87 Difference]: Start difference. First operand 251 states and 260 transitions. Second operand has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 64 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:25,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:42:25,296 INFO L93 Difference]: Finished difference Result 448 states and 467 transitions. [2021-08-21 18:42:25,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 18:42:25,297 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 64 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-08-21 18:42:25,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:42:25,298 INFO L225 Difference]: With dead ends: 448 [2021-08-21 18:42:25,298 INFO L226 Difference]: Without dead ends: 433 [2021-08-21 18:42:25,298 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 108 SyntacticMatches, 1 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 479 ImplicationChecksByTransitivity, 2020.4ms TimeCoverageRelationStatistics Valid=234, Invalid=4188, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 18:42:25,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 433 states. [2021-08-21 18:42:25,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 433 to 259. [2021-08-21 18:42:25,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.0465116279069768) internal successors, (270), 258 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:25,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 270 transitions. [2021-08-21 18:42:25,300 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 270 transitions. Word has length 130 [2021-08-21 18:42:25,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:42:25,301 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 270 transitions. [2021-08-21 18:42:25,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.9692307692307693) internal successors, (193), 64 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:25,301 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 270 transitions. [2021-08-21 18:42:25,301 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-08-21 18:42:25,301 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:42:25,301 INFO L512 BasicCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 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 18:42:25,334 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 18:42:25,529 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,71 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:25,529 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:42:25,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:42:25,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1268141038, now seen corresponding path program 70 times [2021-08-21 18:42:25,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:42:25,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155723829] [2021-08-21 18:42:25,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:42:25,530 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:42:25,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:26,813 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:26,813 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:42:26,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155723829] [2021-08-21 18:42:26,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155723829] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:26,813 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143000315] [2021-08-21 18:42:26,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:42:26,813 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:26,813 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:42:26,814 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 18:42:26,814 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 18:42:31,191 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:42:31,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:42:31,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 86 conjunts are in the unsatisfiable core [2021-08-21 18:42:31,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:33,345 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 18:42:33,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 37 [2021-08-21 18:42:33,364 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 0 proven. 954 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:33,364 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [143000315] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:33,364 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:42:33,364 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 63 [2021-08-21 18:42:33,364 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174666167] [2021-08-21 18:42:33,365 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-08-21 18:42:33,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:42:33,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-08-21 18:42:33,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=182, Invalid=3850, Unknown=0, NotChecked=0, Total=4032 [2021-08-21 18:42:33,365 INFO L87 Difference]: Start difference. First operand 259 states and 270 transitions. Second operand has 64 states, 64 states have (on average 3.0) internal successors, (192), 63 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:34,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:42:34,401 INFO L93 Difference]: Finished difference Result 455 states and 475 transitions. [2021-08-21 18:42:34,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 18:42:34,401 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.0) internal successors, (192), 63 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2021-08-21 18:42:34,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:42:34,402 INFO L225 Difference]: With dead ends: 455 [2021-08-21 18:42:34,403 INFO L226 Difference]: Without dead ends: 440 [2021-08-21 18:42:34,403 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 108 SyntacticMatches, 2 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1084 ImplicationChecksByTransitivity, 1805.2ms TimeCoverageRelationStatistics Valid=192, Invalid=4098, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 18:42:34,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-08-21 18:42:34,405 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 269. [2021-08-21 18:42:34,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 268 states have (on average 1.0485074626865671) internal successors, (281), 268 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:34,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 281 transitions. [2021-08-21 18:42:34,405 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 281 transitions. Word has length 130 [2021-08-21 18:42:34,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:42:34,406 INFO L470 AbstractCegarLoop]: Abstraction has 269 states and 281 transitions. [2021-08-21 18:42:34,406 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.0) internal successors, (192), 63 states have internal predecessors, (192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:34,406 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 281 transitions. [2021-08-21 18:42:34,406 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-08-21 18:42:34,406 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:42:34,406 INFO L512 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 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 18:42:34,434 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-08-21 18:42:34,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,72 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:34,607 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:42:34,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:42:34,607 INFO L82 PathProgramCache]: Analyzing trace with hash 824167430, now seen corresponding path program 71 times [2021-08-21 18:42:34,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:42:34,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921507631] [2021-08-21 18:42:34,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:42:34,607 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:42:34,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:35,163 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 477 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:35,163 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:42:35,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921507631] [2021-08-21 18:42:35,163 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921507631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:35,163 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930186991] [2021-08-21 18:42:35,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:42:35,163 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:35,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:42:35,164 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 18:42:35,164 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 18:42:39,695 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-08-21 18:42:39,695 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:42:39,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 18:42:39,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:40,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 477 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:40,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930186991] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:40,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:42:40,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 60 [2021-08-21 18:42:40,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98146032] [2021-08-21 18:42:40,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-08-21 18:42:40,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:42:40,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-08-21 18:42:40,574 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 18:42:40,574 INFO L87 Difference]: Start difference. First operand 269 states and 281 transitions. Second operand has 60 states, 60 states have (on average 3.15) internal successors, (189), 60 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:41,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:42:41,030 INFO L93 Difference]: Finished difference Result 468 states and 486 transitions. [2021-08-21 18:42:41,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-08-21 18:42:41,031 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.15) internal successors, (189), 60 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-08-21 18:42:41,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:42:41,032 INFO L225 Difference]: With dead ends: 468 [2021-08-21 18:42:41,032 INFO L226 Difference]: Without dead ends: 468 [2021-08-21 18:42:41,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 114 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1822 ImplicationChecksByTransitivity, 1101.8ms TimeCoverageRelationStatistics Valid=1934, Invalid=4708, Unknown=0, NotChecked=0, Total=6642 [2021-08-21 18:42:41,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 468 states. [2021-08-21 18:42:41,034 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 468 to 260. [2021-08-21 18:42:41,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.0386100386100385) internal successors, (269), 259 states have internal predecessors, (269), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:41,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 269 transitions. [2021-08-21 18:42:41,035 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 269 transitions. Word has length 133 [2021-08-21 18:42:41,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:42:41,035 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 269 transitions. [2021-08-21 18:42:41,035 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.15) internal successors, (189), 60 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:41,035 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 269 transitions. [2021-08-21 18:42:41,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-08-21 18:42:41,036 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:42:41,036 INFO L512 BasicCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 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 18:42:41,066 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-08-21 18:42:41,236 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-08-21 18:42:41,236 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:42:41,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:42:41,237 INFO L82 PathProgramCache]: Analyzing trace with hash 208171134, now seen corresponding path program 72 times [2021-08-21 18:42:41,237 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:42:41,237 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072977788] [2021-08-21 18:42:41,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:42:41,237 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:42:41,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:41,812 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 532 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:41,812 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:42:41,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072977788] [2021-08-21 18:42:41,812 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2072977788] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:41,812 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1063929318] [2021-08-21 18:42:41,812 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:42:41,812 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:41,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:42:41,825 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 18:42:41,844 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 18:42:46,479 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2021-08-21 18:42:46,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:42:46,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 40 conjunts are in the unsatisfiable core [2021-08-21 18:42:46,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 532 proven. 477 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:47,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1063929318] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:47,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:42:47,501 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 60 [2021-08-21 18:42:47,501 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1289106384] [2021-08-21 18:42:47,501 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-08-21 18:42:47,501 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:42:47,502 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-08-21 18:42:47,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=839, Invalid=2701, Unknown=0, NotChecked=0, Total=3540 [2021-08-21 18:42:47,502 INFO L87 Difference]: Start difference. First operand 260 states and 269 transitions. Second operand has 60 states, 60 states have (on average 3.15) internal successors, (189), 60 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:47,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:42:47,927 INFO L93 Difference]: Finished difference Result 436 states and 445 transitions. [2021-08-21 18:42:47,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-08-21 18:42:47,927 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 3.15) internal successors, (189), 60 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-08-21 18:42:47,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:42:47,928 INFO L225 Difference]: With dead ends: 436 [2021-08-21 18:42:47,928 INFO L226 Difference]: Without dead ends: 265 [2021-08-21 18:42:47,929 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 193 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1216 ImplicationChecksByTransitivity, 1296.5ms TimeCoverageRelationStatistics Valid=1489, Invalid=4831, Unknown=0, NotChecked=0, Total=6320 [2021-08-21 18:42:47,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2021-08-21 18:42:47,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 263. [2021-08-21 18:42:47,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.0381679389312977) internal successors, (272), 262 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:47,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 272 transitions. [2021-08-21 18:42:47,931 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 272 transitions. Word has length 133 [2021-08-21 18:42:47,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:42:47,931 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 272 transitions. [2021-08-21 18:42:47,931 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 3.15) internal successors, (189), 60 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:47,931 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 272 transitions. [2021-08-21 18:42:47,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-08-21 18:42:47,931 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:42:47,931 INFO L512 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 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 18:42:47,962 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-08-21 18:42:48,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,74 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:48,153 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:42:48,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:42:48,153 INFO L82 PathProgramCache]: Analyzing trace with hash 375056036, now seen corresponding path program 73 times [2021-08-21 18:42:48,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:42:48,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061043244] [2021-08-21 18:42:48,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:42:48,153 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:42:48,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:49,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:49,441 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:42:49,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061043244] [2021-08-21 18:42:49,441 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061043244] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:49,441 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052894207] [2021-08-21 18:42:49,441 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:42:49,441 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:49,441 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:42:49,442 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 18:42:49,442 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 18:42:54,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:54,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 90 conjunts are in the unsatisfiable core [2021-08-21 18:42:54,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:42:56,600 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:42:56,600 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 39 [2021-08-21 18:42:56,626 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:56,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052894207] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:56,626 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:42:56,626 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 67 [2021-08-21 18:42:56,626 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181344662] [2021-08-21 18:42:56,627 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-08-21 18:42:56,627 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:42:56,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-08-21 18:42:56,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=234, Invalid=4322, Unknown=0, NotChecked=0, Total=4556 [2021-08-21 18:42:56,627 INFO L87 Difference]: Start difference. First operand 263 states and 272 transitions. Second operand has 68 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 67 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:57,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:42:57,681 INFO L93 Difference]: Finished difference Result 469 states and 488 transitions. [2021-08-21 18:42:57,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 18:42:57,681 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 67 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-08-21 18:42:57,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:42:57,682 INFO L225 Difference]: With dead ends: 469 [2021-08-21 18:42:57,682 INFO L226 Difference]: Without dead ends: 454 [2021-08-21 18:42:57,683 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 113 SyntacticMatches, 1 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 514 ImplicationChecksByTransitivity, 2257.2ms TimeCoverageRelationStatistics Valid=245, Invalid=4585, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 18:42:57,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 454 states. [2021-08-21 18:42:57,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 454 to 271. [2021-08-21 18:42:57,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 271 states, 270 states have (on average 1.0444444444444445) internal successors, (282), 270 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:57,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 271 states to 271 states and 282 transitions. [2021-08-21 18:42:57,685 INFO L78 Accepts]: Start accepts. Automaton has 271 states and 282 transitions. Word has length 136 [2021-08-21 18:42:57,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:42:57,685 INFO L470 AbstractCegarLoop]: Abstraction has 271 states and 282 transitions. [2021-08-21 18:42:57,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.9705882352941178) internal successors, (202), 67 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:42:57,685 INFO L276 IsEmpty]: Start isEmpty. Operand 271 states and 282 transitions. [2021-08-21 18:42:57,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-08-21 18:42:57,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:42:57,686 INFO L512 BasicCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 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 18:42:57,714 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-08-21 18:42:57,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,75 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:57,893 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:42:57,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:42:57,894 INFO L82 PathProgramCache]: Analyzing trace with hash -938261068, now seen corresponding path program 74 times [2021-08-21 18:42:57,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:42:57,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340704675] [2021-08-21 18:42:57,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:42:57,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:42:57,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:42:59,181 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:42:59,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:42:59,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340704675] [2021-08-21 18:42:59,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340704675] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:42:59,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082270317] [2021-08-21 18:42:59,181 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:42:59,181 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:42:59,182 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:42:59,182 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 18:42:59,186 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 18:43:03,982 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:43:03,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:43:03,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 244 conjuncts, 90 conjunts are in the unsatisfiable core [2021-08-21 18:43:03,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:43:06,264 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 18:43:06,265 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 41 [2021-08-21 18:43:06,286 INFO L134 CoverageAnalysis]: Checked inductivity of 1064 backedges. 0 proven. 1064 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:06,286 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082270317] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:06,286 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:43:06,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 66 [2021-08-21 18:43:06,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [120848913] [2021-08-21 18:43:06,287 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-08-21 18:43:06,287 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:43:06,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-08-21 18:43:06,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=4231, Unknown=0, NotChecked=0, Total=4422 [2021-08-21 18:43:06,287 INFO L87 Difference]: Start difference. First operand 271 states and 282 transitions. Second operand has 67 states, 67 states have (on average 3.0) internal successors, (201), 66 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:07,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:43:07,369 INFO L93 Difference]: Finished difference Result 476 states and 496 transitions. [2021-08-21 18:43:07,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 18:43:07,370 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 3.0) internal successors, (201), 66 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 136 [2021-08-21 18:43:07,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:43:07,371 INFO L225 Difference]: With dead ends: 476 [2021-08-21 18:43:07,371 INFO L226 Difference]: Without dead ends: 461 [2021-08-21 18:43:07,371 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 113 SyntacticMatches, 2 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1191 ImplicationChecksByTransitivity, 1900.2ms TimeCoverageRelationStatistics Valid=201, Invalid=4491, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 18:43:07,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 461 states. [2021-08-21 18:43:07,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 461 to 281. [2021-08-21 18:43:07,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 281 states, 280 states have (on average 1.0464285714285715) internal successors, (293), 280 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:07,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 281 states to 281 states and 293 transitions. [2021-08-21 18:43:07,374 INFO L78 Accepts]: Start accepts. Automaton has 281 states and 293 transitions. Word has length 136 [2021-08-21 18:43:07,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:43:07,374 INFO L470 AbstractCegarLoop]: Abstraction has 281 states and 293 transitions. [2021-08-21 18:43:07,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 3.0) internal successors, (201), 66 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:07,374 INFO L276 IsEmpty]: Start isEmpty. Operand 281 states and 293 transitions. [2021-08-21 18:43:07,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-08-21 18:43:07,375 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:43:07,375 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 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 18:43:07,404 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-08-21 18:43:07,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-08-21 18:43:07,575 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:43:07,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:43:07,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1528957250, now seen corresponding path program 75 times [2021-08-21 18:43:07,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:43:07,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143854966] [2021-08-21 18:43:07,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:43:07,576 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:43:07,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:43:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 532 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:08,153 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:43:08,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143854966] [2021-08-21 18:43:08,153 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143854966] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:08,153 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289431218] [2021-08-21 18:43:08,153 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:43:08,153 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:08,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:43:08,154 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 18:43:08,154 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 18:43:13,174 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-08-21 18:43:13,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:43:13,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:43:13,177 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:43:14,061 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 532 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:14,062 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289431218] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:14,062 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:43:14,062 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 63 [2021-08-21 18:43:14,062 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625775765] [2021-08-21 18:43:14,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-08-21 18:43:14,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:43:14,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-08-21 18:43:14,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 18:43:14,063 INFO L87 Difference]: Start difference. First operand 281 states and 293 transitions. Second operand has 63 states, 63 states have (on average 3.142857142857143) internal successors, (198), 63 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:14,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:43:14,680 INFO L93 Difference]: Finished difference Result 489 states and 507 transitions. [2021-08-21 18:43:14,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-08-21 18:43:14,680 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.142857142857143) internal successors, (198), 63 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-08-21 18:43:14,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:43:14,682 INFO L225 Difference]: With dead ends: 489 [2021-08-21 18:43:14,682 INFO L226 Difference]: Without dead ends: 489 [2021-08-21 18:43:14,682 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 119 SyntacticMatches, 1 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2018 ImplicationChecksByTransitivity, 1182.5ms TimeCoverageRelationStatistics Valid=2125, Invalid=5185, Unknown=0, NotChecked=0, Total=7310 [2021-08-21 18:43:14,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 489 states. [2021-08-21 18:43:14,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 489 to 272. [2021-08-21 18:43:14,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.03690036900369) internal successors, (281), 271 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:14,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 281 transitions. [2021-08-21 18:43:14,685 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 281 transitions. Word has length 139 [2021-08-21 18:43:14,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:43:14,685 INFO L470 AbstractCegarLoop]: Abstraction has 272 states and 281 transitions. [2021-08-21 18:43:14,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.142857142857143) internal successors, (198), 63 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:14,685 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 281 transitions. [2021-08-21 18:43:14,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2021-08-21 18:43:14,686 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:43:14,686 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 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 18:43:14,716 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 18:43:14,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-08-21 18:43:14,886 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:43:14,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:43:14,887 INFO L82 PathProgramCache]: Analyzing trace with hash -279355578, now seen corresponding path program 76 times [2021-08-21 18:43:14,887 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:43:14,887 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715471084] [2021-08-21 18:43:14,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:43:14,887 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:43:14,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:43:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 590 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:15,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:43:15,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715471084] [2021-08-21 18:43:15,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1715471084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:15,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028693744] [2021-08-21 18:43:15,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:43:15,511 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:15,511 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:43:15,511 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 18:43:15,512 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 18:43:20,557 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:43:20,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:43:20,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 42 conjunts are in the unsatisfiable core [2021-08-21 18:43:20,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:43:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 590 proven. 532 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:21,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028693744] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:21,663 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:43:21,663 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 63 [2021-08-21 18:43:21,663 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1816699181] [2021-08-21 18:43:21,664 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-08-21 18:43:21,664 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:43:21,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-08-21 18:43:21,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=923, Invalid=2983, Unknown=0, NotChecked=0, Total=3906 [2021-08-21 18:43:21,665 INFO L87 Difference]: Start difference. First operand 272 states and 281 transitions. Second operand has 63 states, 63 states have (on average 3.142857142857143) internal successors, (198), 63 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:22,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:43:22,261 INFO L93 Difference]: Finished difference Result 457 states and 466 transitions. [2021-08-21 18:43:22,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-08-21 18:43:22,262 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 3.142857142857143) internal successors, (198), 63 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 139 [2021-08-21 18:43:22,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:43:22,262 INFO L225 Difference]: With dead ends: 457 [2021-08-21 18:43:22,263 INFO L226 Difference]: Without dead ends: 277 [2021-08-21 18:43:22,263 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1350 ImplicationChecksByTransitivity, 1514.5ms TimeCoverageRelationStatistics Valid=1637, Invalid=5335, Unknown=0, NotChecked=0, Total=6972 [2021-08-21 18:43:22,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 277 states. [2021-08-21 18:43:22,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 277 to 275. [2021-08-21 18:43:22,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 275 states, 274 states have (on average 1.0364963503649636) internal successors, (284), 274 states have internal predecessors, (284), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:22,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 275 states to 275 states and 284 transitions. [2021-08-21 18:43:22,265 INFO L78 Accepts]: Start accepts. Automaton has 275 states and 284 transitions. Word has length 139 [2021-08-21 18:43:22,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:43:22,265 INFO L470 AbstractCegarLoop]: Abstraction has 275 states and 284 transitions. [2021-08-21 18:43:22,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 3.142857142857143) internal successors, (198), 63 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:22,265 INFO L276 IsEmpty]: Start isEmpty. Operand 275 states and 284 transitions. [2021-08-21 18:43:22,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-08-21 18:43:22,266 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:43:22,266 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 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 18:43:22,296 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 18:43:22,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,78 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:22,481 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:43:22,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:43:22,481 INFO L82 PathProgramCache]: Analyzing trace with hash 893919468, now seen corresponding path program 77 times [2021-08-21 18:43:22,481 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:43:22,481 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805152396] [2021-08-21 18:43:22,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:43:22,481 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:43:22,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:43:23,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:23,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:43:23,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805152396] [2021-08-21 18:43:23,858 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805152396] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:23,858 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424937428] [2021-08-21 18:43:23,858 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:43:23,858 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:23,858 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:43:23,858 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 18:43:23,859 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 18:43:29,015 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 21 check-sat command(s) [2021-08-21 18:43:29,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:43:29,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 94 conjunts are in the unsatisfiable core [2021-08-21 18:43:29,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:43:31,670 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:43:31,670 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 39 [2021-08-21 18:43:31,698 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:31,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424937428] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:31,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:43:31,698 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 70 [2021-08-21 18:43:31,698 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592803075] [2021-08-21 18:43:31,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-08-21 18:43:31,699 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:43:31,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-08-21 18:43:31,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=4725, Unknown=0, NotChecked=0, Total=4970 [2021-08-21 18:43:31,699 INFO L87 Difference]: Start difference. First operand 275 states and 284 transitions. Second operand has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:32,722 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:43:32,722 INFO L93 Difference]: Finished difference Result 490 states and 509 transitions. [2021-08-21 18:43:32,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 18:43:32,723 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-08-21 18:43:32,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:43:32,724 INFO L225 Difference]: With dead ends: 490 [2021-08-21 18:43:32,724 INFO L226 Difference]: Without dead ends: 475 [2021-08-21 18:43:32,724 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 118 SyntacticMatches, 1 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 550 ImplicationChecksByTransitivity, 2444.1ms TimeCoverageRelationStatistics Valid=256, Invalid=5000, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 18:43:32,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 475 states. [2021-08-21 18:43:32,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 475 to 283. [2021-08-21 18:43:32,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 283 states, 282 states have (on average 1.0425531914893618) internal successors, (294), 282 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:32,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 283 states to 283 states and 294 transitions. [2021-08-21 18:43:32,727 INFO L78 Accepts]: Start accepts. Automaton has 283 states and 294 transitions. Word has length 142 [2021-08-21 18:43:32,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:43:32,727 INFO L470 AbstractCegarLoop]: Abstraction has 283 states and 294 transitions. [2021-08-21 18:43:32,727 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.971830985915493) internal successors, (211), 70 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:32,727 INFO L276 IsEmpty]: Start isEmpty. Operand 283 states and 294 transitions. [2021-08-21 18:43:32,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-08-21 18:43:32,728 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:43:32,728 INFO L512 BasicCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 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 18:43:32,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Ended with exit code 0 [2021-08-21 18:43:32,928 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,79 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:32,928 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:43:32,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:43:32,928 INFO L82 PathProgramCache]: Analyzing trace with hash 637142098, now seen corresponding path program 78 times [2021-08-21 18:43:32,929 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:43:32,929 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22003169] [2021-08-21 18:43:32,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:43:32,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:43:32,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:43:34,351 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:34,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:43:34,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22003169] [2021-08-21 18:43:34,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22003169] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:34,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022058886] [2021-08-21 18:43:34,351 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:43:34,352 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:34,352 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:43:34,352 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 18:43:34,353 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 18:43:39,667 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2021-08-21 18:43:39,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:43:39,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 94 conjunts are in the unsatisfiable core [2021-08-21 18:43:39,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:43:42,118 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 18:43:42,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 41 [2021-08-21 18:43:42,139 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 0 proven. 1180 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:42,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022058886] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:42,139 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:43:42,139 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 69 [2021-08-21 18:43:42,139 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157985888] [2021-08-21 18:43:42,139 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-08-21 18:43:42,139 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:43:42,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-08-21 18:43:42,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=4630, Unknown=0, NotChecked=0, Total=4830 [2021-08-21 18:43:42,140 INFO L87 Difference]: Start difference. First operand 283 states and 294 transitions. Second operand has 70 states, 70 states have (on average 3.0) internal successors, (210), 69 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:43,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:43:43,154 INFO L93 Difference]: Finished difference Result 497 states and 517 transitions. [2021-08-21 18:43:43,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 18:43:43,155 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 3.0) internal successors, (210), 69 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 142 [2021-08-21 18:43:43,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:43:43,156 INFO L225 Difference]: With dead ends: 497 [2021-08-21 18:43:43,156 INFO L226 Difference]: Without dead ends: 482 [2021-08-21 18:43:43,156 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 118 SyntacticMatches, 2 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1303 ImplicationChecksByTransitivity, 2096.9ms TimeCoverageRelationStatistics Valid=210, Invalid=4902, Unknown=0, NotChecked=0, Total=5112 [2021-08-21 18:43:43,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-08-21 18:43:43,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 293. [2021-08-21 18:43:43,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 292 states have (on average 1.0445205479452055) internal successors, (305), 292 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:43,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 305 transitions. [2021-08-21 18:43:43,159 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 305 transitions. Word has length 142 [2021-08-21 18:43:43,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:43:43,159 INFO L470 AbstractCegarLoop]: Abstraction has 293 states and 305 transitions. [2021-08-21 18:43:43,159 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 3.0) internal successors, (210), 69 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:43,160 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 305 transitions. [2021-08-21 18:43:43,160 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-08-21 18:43:43,160 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:43:43,160 INFO L512 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 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 18:43:43,191 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 18:43:43,360 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable82 [2021-08-21 18:43:43,361 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:43:43,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:43:43,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1486960006, now seen corresponding path program 79 times [2021-08-21 18:43:43,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:43:43,361 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577655655] [2021-08-21 18:43:43,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:43:43,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:43:43,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:43:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 590 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:44,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:43:44,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577655655] [2021-08-21 18:43:44,033 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577655655] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:44,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1634286340] [2021-08-21 18:43:44,033 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:43:44,033 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:44,033 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:43:44,034 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 18:43:44,035 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 18:43:49,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:43:49,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 18:43:49,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:43:50,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 590 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:50,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1634286340] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:50,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:43:50,481 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 66 [2021-08-21 18:43:50,481 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159190534] [2021-08-21 18:43:50,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-08-21 18:43:50,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:43:50,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-08-21 18:43:50,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1011, Invalid=3279, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 18:43:50,482 INFO L87 Difference]: Start difference. First operand 293 states and 305 transitions. Second operand has 66 states, 66 states have (on average 3.1363636363636362) internal successors, (207), 66 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:51,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:43:51,037 INFO L93 Difference]: Finished difference Result 510 states and 528 transitions. [2021-08-21 18:43:51,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-08-21 18:43:51,037 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.1363636363636362) internal successors, (207), 66 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-08-21 18:43:51,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:43:51,038 INFO L225 Difference]: With dead ends: 510 [2021-08-21 18:43:51,038 INFO L226 Difference]: Without dead ends: 510 [2021-08-21 18:43:51,039 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 124 SyntacticMatches, 1 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2224 ImplicationChecksByTransitivity, 1336.2ms TimeCoverageRelationStatistics Valid=2325, Invalid=5685, Unknown=0, NotChecked=0, Total=8010 [2021-08-21 18:43:51,040 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 510 states. [2021-08-21 18:43:51,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 510 to 284. [2021-08-21 18:43:51,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 284 states, 283 states have (on average 1.0353356890459364) internal successors, (293), 283 states have internal predecessors, (293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:51,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 284 states to 284 states and 293 transitions. [2021-08-21 18:43:51,042 INFO L78 Accepts]: Start accepts. Automaton has 284 states and 293 transitions. Word has length 145 [2021-08-21 18:43:51,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:43:51,042 INFO L470 AbstractCegarLoop]: Abstraction has 284 states and 293 transitions. [2021-08-21 18:43:51,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.1363636363636362) internal successors, (207), 66 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:51,043 INFO L276 IsEmpty]: Start isEmpty. Operand 284 states and 293 transitions. [2021-08-21 18:43:51,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2021-08-21 18:43:51,043 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:43:51,043 INFO L512 BasicCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 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 18:43:51,080 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Ended with exit code 0 [2021-08-21 18:43:51,243 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,81 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:51,244 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:43:51,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:43:51,244 INFO L82 PathProgramCache]: Analyzing trace with hash -406151170, now seen corresponding path program 80 times [2021-08-21 18:43:51,244 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:43:51,244 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030776653] [2021-08-21 18:43:51,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:43:51,244 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:43:51,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:43:51,922 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 651 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:51,922 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:43:51,922 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030776653] [2021-08-21 18:43:51,922 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030776653] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:51,923 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894358563] [2021-08-21 18:43:51,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:43:51,923 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:51,923 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:43:51,924 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 18:43:51,925 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 18:43:57,497 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:43:57,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:43:57,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 44 conjunts are in the unsatisfiable core [2021-08-21 18:43:57,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:43:58,665 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 651 proven. 590 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:43:58,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1894358563] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:43:58,666 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:43:58,666 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 66 [2021-08-21 18:43:58,666 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669223549] [2021-08-21 18:43:58,666 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-08-21 18:43:58,666 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:43:58,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-08-21 18:43:58,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1011, Invalid=3279, Unknown=0, NotChecked=0, Total=4290 [2021-08-21 18:43:58,667 INFO L87 Difference]: Start difference. First operand 284 states and 293 transitions. Second operand has 66 states, 66 states have (on average 3.1363636363636362) internal successors, (207), 66 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:59,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:43:59,158 INFO L93 Difference]: Finished difference Result 478 states and 487 transitions. [2021-08-21 18:43:59,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-08-21 18:43:59,159 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 3.1363636363636362) internal successors, (207), 66 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 145 [2021-08-21 18:43:59,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:43:59,159 INFO L225 Difference]: With dead ends: 478 [2021-08-21 18:43:59,159 INFO L226 Difference]: Without dead ends: 289 [2021-08-21 18:43:59,160 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1491 ImplicationChecksByTransitivity, 1545.5ms TimeCoverageRelationStatistics Valid=1792, Invalid=5864, Unknown=0, NotChecked=0, Total=7656 [2021-08-21 18:43:59,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2021-08-21 18:43:59,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 287. [2021-08-21 18:43:59,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 287 states, 286 states have (on average 1.034965034965035) internal successors, (296), 286 states have internal predecessors, (296), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:59,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 287 states to 287 states and 296 transitions. [2021-08-21 18:43:59,162 INFO L78 Accepts]: Start accepts. Automaton has 287 states and 296 transitions. Word has length 145 [2021-08-21 18:43:59,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:43:59,162 INFO L470 AbstractCegarLoop]: Abstraction has 287 states and 296 transitions. [2021-08-21 18:43:59,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 3.1363636363636362) internal successors, (207), 66 states have internal predecessors, (207), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:43:59,162 INFO L276 IsEmpty]: Start isEmpty. Operand 287 states and 296 transitions. [2021-08-21 18:43:59,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-08-21 18:43:59,163 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:43:59,163 INFO L512 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 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 18:43:59,195 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-08-21 18:43:59,364 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,82 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:43:59,365 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:43:59,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:43:59,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1664027940, now seen corresponding path program 81 times [2021-08-21 18:43:59,365 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:43:59,365 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850583007] [2021-08-21 18:43:59,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:43:59,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:43:59,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:00,860 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 0 proven. 1302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:00,861 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:00,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850583007] [2021-08-21 18:44:00,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850583007] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:00,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002809334] [2021-08-21 18:44:00,861 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:44:00,861 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:00,861 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:00,862 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 18:44:00,863 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 18:44:06,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-08-21 18:44:06,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:44:06,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 98 conjunts are in the unsatisfiable core [2021-08-21 18:44:06,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:09,281 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:44:09,281 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 65 treesize of output 39 [2021-08-21 18:44:09,305 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 0 proven. 1302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:09,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1002809334] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:09,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:09,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 73 [2021-08-21 18:44:09,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2112156818] [2021-08-21 18:44:09,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-08-21 18:44:09,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:09,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-08-21 18:44:09,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=256, Invalid=5146, Unknown=0, NotChecked=0, Total=5402 [2021-08-21 18:44:09,306 INFO L87 Difference]: Start difference. First operand 287 states and 296 transitions. Second operand has 74 states, 74 states have (on average 2.972972972972973) internal successors, (220), 73 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:10,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:44:10,533 INFO L93 Difference]: Finished difference Result 511 states and 530 transitions. [2021-08-21 18:44:10,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-21 18:44:10,533 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.972972972972973) internal successors, (220), 73 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-08-21 18:44:10,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:44:10,535 INFO L225 Difference]: With dead ends: 511 [2021-08-21 18:44:10,535 INFO L226 Difference]: Without dead ends: 496 [2021-08-21 18:44:10,535 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 123 SyntacticMatches, 1 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 587 ImplicationChecksByTransitivity, 2663.2ms TimeCoverageRelationStatistics Valid=267, Invalid=5433, Unknown=0, NotChecked=0, Total=5700 [2021-08-21 18:44:10,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2021-08-21 18:44:10,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 295. [2021-08-21 18:44:10,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 295 states, 294 states have (on average 1.0408163265306123) internal successors, (306), 294 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:10,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 295 states to 295 states and 306 transitions. [2021-08-21 18:44:10,538 INFO L78 Accepts]: Start accepts. Automaton has 295 states and 306 transitions. Word has length 148 [2021-08-21 18:44:10,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:44:10,538 INFO L470 AbstractCegarLoop]: Abstraction has 295 states and 306 transitions. [2021-08-21 18:44:10,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.972972972972973) internal successors, (220), 73 states have internal predecessors, (220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:10,538 INFO L276 IsEmpty]: Start isEmpty. Operand 295 states and 306 transitions. [2021-08-21 18:44:10,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-08-21 18:44:10,539 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:10,539 INFO L512 BasicCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 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 18:44:10,571 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 18:44:10,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-08-21 18:44:10,739 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:44:10,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:10,740 INFO L82 PathProgramCache]: Analyzing trace with hash -1032846220, now seen corresponding path program 82 times [2021-08-21 18:44:10,740 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:10,740 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121345631] [2021-08-21 18:44:10,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:10,740 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:10,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:12,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 0 proven. 1302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:12,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:12,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121345631] [2021-08-21 18:44:12,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121345631] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:12,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993305592] [2021-08-21 18:44:12,234 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:44:12,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:12,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:12,235 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 18:44:12,235 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 18:44:18,022 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:44:18,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:44:18,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 98 conjunts are in the unsatisfiable core [2021-08-21 18:44:18,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:20,583 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 18:44:20,584 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 41 [2021-08-21 18:44:20,603 INFO L134 CoverageAnalysis]: Checked inductivity of 1302 backedges. 0 proven. 1302 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:20,604 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [993305592] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:20,604 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:20,604 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 72 [2021-08-21 18:44:20,604 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498654075] [2021-08-21 18:44:20,604 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-08-21 18:44:20,604 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:20,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-08-21 18:44:20,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=5047, Unknown=0, NotChecked=0, Total=5256 [2021-08-21 18:44:20,605 INFO L87 Difference]: Start difference. First operand 295 states and 306 transitions. Second operand has 73 states, 73 states have (on average 3.0) internal successors, (219), 72 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:21,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:44:21,976 INFO L93 Difference]: Finished difference Result 518 states and 538 transitions. [2021-08-21 18:44:21,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-21 18:44:21,977 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 3.0) internal successors, (219), 72 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 148 [2021-08-21 18:44:21,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:44:21,978 INFO L225 Difference]: With dead ends: 518 [2021-08-21 18:44:21,978 INFO L226 Difference]: Without dead ends: 503 [2021-08-21 18:44:21,979 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 123 SyntacticMatches, 2 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1420 ImplicationChecksByTransitivity, 2227.0ms TimeCoverageRelationStatistics Valid=219, Invalid=5331, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 18:44:21,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 503 states. [2021-08-21 18:44:21,982 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 503 to 305. [2021-08-21 18:44:21,982 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 305 states, 304 states have (on average 1.042763157894737) internal successors, (317), 304 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:21,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 305 states to 305 states and 317 transitions. [2021-08-21 18:44:21,982 INFO L78 Accepts]: Start accepts. Automaton has 305 states and 317 transitions. Word has length 148 [2021-08-21 18:44:21,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:44:21,982 INFO L470 AbstractCegarLoop]: Abstraction has 305 states and 317 transitions. [2021-08-21 18:44:21,983 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 3.0) internal successors, (219), 72 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:21,983 INFO L276 IsEmpty]: Start isEmpty. Operand 305 states and 317 transitions. [2021-08-21 18:44:21,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-08-21 18:44:21,983 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:21,983 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 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 18:44:22,016 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 18:44:22,183 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,84 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:22,184 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:44:22,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:22,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1360476610, now seen corresponding path program 83 times [2021-08-21 18:44:22,184 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:22,184 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444921936] [2021-08-21 18:44:22,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:22,184 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:22,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:22,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 651 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:22,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:22,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444921936] [2021-08-21 18:44:22,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444921936] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:22,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [489227727] [2021-08-21 18:44:22,896 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:44:22,896 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:22,896 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:22,897 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 18:44:22,898 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 18:44:28,891 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-08-21 18:44:28,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:44:28,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 18:44:28,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:29,894 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 651 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:29,895 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [489227727] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:29,895 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:29,895 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 69 [2021-08-21 18:44:29,895 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315723651] [2021-08-21 18:44:29,895 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-08-21 18:44:29,895 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:29,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-08-21 18:44:29,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1103, Invalid=3589, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 18:44:29,896 INFO L87 Difference]: Start difference. First operand 305 states and 317 transitions. Second operand has 69 states, 69 states have (on average 3.130434782608696) internal successors, (216), 69 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:30,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:44:30,603 INFO L93 Difference]: Finished difference Result 531 states and 549 transitions. [2021-08-21 18:44:30,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-08-21 18:44:30,603 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.130434782608696) internal successors, (216), 69 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-08-21 18:44:30,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:44:30,605 INFO L225 Difference]: With dead ends: 531 [2021-08-21 18:44:30,605 INFO L226 Difference]: Without dead ends: 531 [2021-08-21 18:44:30,606 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 129 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2440 ImplicationChecksByTransitivity, 1421.9ms TimeCoverageRelationStatistics Valid=2534, Invalid=6208, Unknown=0, NotChecked=0, Total=8742 [2021-08-21 18:44:30,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 531 states. [2021-08-21 18:44:30,608 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 531 to 296. [2021-08-21 18:44:30,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.0338983050847457) internal successors, (305), 295 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:30,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 305 transitions. [2021-08-21 18:44:30,609 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 305 transitions. Word has length 151 [2021-08-21 18:44:30,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:44:30,609 INFO L470 AbstractCegarLoop]: Abstraction has 296 states and 305 transitions. [2021-08-21 18:44:30,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.130434782608696) internal successors, (216), 69 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:30,609 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 305 transitions. [2021-08-21 18:44:30,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-08-21 18:44:30,610 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:30,610 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 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 18:44:30,646 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-08-21 18:44:30,810 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,85 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:30,810 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:44:30,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:30,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1819957050, now seen corresponding path program 84 times [2021-08-21 18:44:30,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:30,811 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [247082159] [2021-08-21 18:44:30,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:30,811 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:30,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:31,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 715 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:31,504 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:31,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [247082159] [2021-08-21 18:44:31,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [247082159] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:31,504 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810997776] [2021-08-21 18:44:31,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:44:31,504 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:31,504 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:31,505 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 18:44:31,505 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 18:44:37,664 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-08-21 18:44:37,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:44:37,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 46 conjunts are in the unsatisfiable core [2021-08-21 18:44:37,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:38,962 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 715 proven. 651 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:38,963 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1810997776] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:38,963 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:38,963 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 69 [2021-08-21 18:44:38,963 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998767724] [2021-08-21 18:44:38,963 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-08-21 18:44:38,963 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:38,963 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-08-21 18:44:38,964 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1103, Invalid=3589, Unknown=0, NotChecked=0, Total=4692 [2021-08-21 18:44:38,964 INFO L87 Difference]: Start difference. First operand 296 states and 305 transitions. Second operand has 69 states, 69 states have (on average 3.130434782608696) internal successors, (216), 69 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:39,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:44:39,528 INFO L93 Difference]: Finished difference Result 499 states and 508 transitions. [2021-08-21 18:44:39,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-08-21 18:44:39,529 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 3.130434782608696) internal successors, (216), 69 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-08-21 18:44:39,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:44:39,529 INFO L225 Difference]: With dead ends: 499 [2021-08-21 18:44:39,529 INFO L226 Difference]: Without dead ends: 301 [2021-08-21 18:44:39,530 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 220 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1639 ImplicationChecksByTransitivity, 1704.1ms TimeCoverageRelationStatistics Valid=1954, Invalid=6418, Unknown=0, NotChecked=0, Total=8372 [2021-08-21 18:44:39,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 301 states. [2021-08-21 18:44:39,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 301 to 299. [2021-08-21 18:44:39,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.0335570469798658) internal successors, (308), 298 states have internal predecessors, (308), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:39,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 308 transitions. [2021-08-21 18:44:39,532 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 308 transitions. Word has length 151 [2021-08-21 18:44:39,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:44:39,532 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 308 transitions. [2021-08-21 18:44:39,532 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 3.130434782608696) internal successors, (216), 69 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:39,532 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 308 transitions. [2021-08-21 18:44:39,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-08-21 18:44:39,533 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:39,533 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 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 18:44:39,568 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Ended with exit code 0 [2021-08-21 18:44:39,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-08-21 18:44:39,733 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:44:39,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:39,734 INFO L82 PathProgramCache]: Analyzing trace with hash -716103316, now seen corresponding path program 85 times [2021-08-21 18:44:39,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:39,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352264361] [2021-08-21 18:44:39,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:39,734 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:39,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:41,323 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:41,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:41,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352264361] [2021-08-21 18:44:41,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352264361] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:41,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106180536] [2021-08-21 18:44:41,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:44:41,324 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:41,324 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:41,325 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 18:44:41,325 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 18:44:47,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:47,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 102 conjunts are in the unsatisfiable core [2021-08-21 18:44:47,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:44:50,431 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:44:50,431 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 65 treesize of output 39 [2021-08-21 18:44:50,457 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:50,457 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106180536] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:50,457 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:44:50,457 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 76 [2021-08-21 18:44:50,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923187453] [2021-08-21 18:44:50,458 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-08-21 18:44:50,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:44:50,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-08-21 18:44:50,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=5585, Unknown=0, NotChecked=0, Total=5852 [2021-08-21 18:44:50,458 INFO L87 Difference]: Start difference. First operand 299 states and 308 transitions. Second operand has 77 states, 77 states have (on average 2.9740259740259742) internal successors, (229), 76 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:51,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:44:51,949 INFO L93 Difference]: Finished difference Result 532 states and 551 transitions. [2021-08-21 18:44:51,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 18:44:51,949 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.9740259740259742) internal successors, (229), 76 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-08-21 18:44:51,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:44:51,951 INFO L225 Difference]: With dead ends: 532 [2021-08-21 18:44:51,951 INFO L226 Difference]: Without dead ends: 517 [2021-08-21 18:44:51,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 128 SyntacticMatches, 1 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 2838.8ms TimeCoverageRelationStatistics Valid=278, Invalid=5884, Unknown=0, NotChecked=0, Total=6162 [2021-08-21 18:44:51,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 517 states. [2021-08-21 18:44:51,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 517 to 307. [2021-08-21 18:44:51,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 307 states, 306 states have (on average 1.0392156862745099) internal successors, (318), 306 states have internal predecessors, (318), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:51,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 307 states to 307 states and 318 transitions. [2021-08-21 18:44:51,954 INFO L78 Accepts]: Start accepts. Automaton has 307 states and 318 transitions. Word has length 154 [2021-08-21 18:44:51,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:44:51,954 INFO L470 AbstractCegarLoop]: Abstraction has 307 states and 318 transitions. [2021-08-21 18:44:51,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.9740259740259742) internal successors, (229), 76 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:44:51,954 INFO L276 IsEmpty]: Start isEmpty. Operand 307 states and 318 transitions. [2021-08-21 18:44:51,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-08-21 18:44:51,955 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:44:51,955 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 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 18:44:51,993 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-08-21 18:44:52,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,87 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:52,155 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:44:52,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:44:52,155 INFO L82 PathProgramCache]: Analyzing trace with hash 280003730, now seen corresponding path program 86 times [2021-08-21 18:44:52,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:44:52,156 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4949664] [2021-08-21 18:44:52,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:44:52,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:44:52,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:44:53,680 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:44:53,680 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:44:53,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4949664] [2021-08-21 18:44:53,680 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4949664] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:44:53,680 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291057106] [2021-08-21 18:44:53,680 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:44:53,681 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:44:53,681 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:44:53,681 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 18:44:53,682 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 18:45:00,032 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:45:00,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:45:00,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 274 conjuncts, 102 conjunts are in the unsatisfiable core [2021-08-21 18:45:00,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:45:02,913 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 18:45:02,913 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 41 [2021-08-21 18:45:02,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 0 proven. 1430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:02,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291057106] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:02,934 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:45:02,934 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 75 [2021-08-21 18:45:02,934 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950869372] [2021-08-21 18:45:02,934 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-08-21 18:45:02,934 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:45:02,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-08-21 18:45:02,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=218, Invalid=5482, Unknown=0, NotChecked=0, Total=5700 [2021-08-21 18:45:02,935 INFO L87 Difference]: Start difference. First operand 307 states and 318 transitions. Second operand has 76 states, 76 states have (on average 3.0) internal successors, (228), 75 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:04,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:45:04,107 INFO L93 Difference]: Finished difference Result 539 states and 559 transitions. [2021-08-21 18:45:04,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 18:45:04,107 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 3.0) internal successors, (228), 75 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 154 [2021-08-21 18:45:04,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:45:04,109 INFO L225 Difference]: With dead ends: 539 [2021-08-21 18:45:04,109 INFO L226 Difference]: Without dead ends: 524 [2021-08-21 18:45:04,109 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 128 SyntacticMatches, 2 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1542 ImplicationChecksByTransitivity, 2448.5ms TimeCoverageRelationStatistics Valid=228, Invalid=5778, Unknown=0, NotChecked=0, Total=6006 [2021-08-21 18:45:04,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 524 states. [2021-08-21 18:45:04,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 524 to 317. [2021-08-21 18:45:04,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 317 states, 316 states have (on average 1.0411392405063291) internal successors, (329), 316 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:04,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 317 states to 317 states and 329 transitions. [2021-08-21 18:45:04,112 INFO L78 Accepts]: Start accepts. Automaton has 317 states and 329 transitions. Word has length 154 [2021-08-21 18:45:04,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:45:04,112 INFO L470 AbstractCegarLoop]: Abstraction has 317 states and 329 transitions. [2021-08-21 18:45:04,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 3.0) internal successors, (228), 75 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:04,112 INFO L276 IsEmpty]: Start isEmpty. Operand 317 states and 329 transitions. [2021-08-21 18:45:04,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-08-21 18:45:04,113 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:45:04,113 INFO L512 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 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 18:45:04,157 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 18:45:04,313 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,88 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:04,313 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:45:04,314 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:45:04,314 INFO L82 PathProgramCache]: Analyzing trace with hash 1920868102, now seen corresponding path program 87 times [2021-08-21 18:45:04,314 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:45:04,314 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1526873840] [2021-08-21 18:45:04,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:45:04,314 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:45:04,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:05,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 715 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:05,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:45:05,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1526873840] [2021-08-21 18:45:05,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1526873840] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:05,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [458176283] [2021-08-21 18:45:05,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:45:05,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:05,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:45:05,096 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 18:45:05,096 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 18:45:11,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-08-21 18:45:11,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:45:11,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 18:45:11,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:45:12,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 715 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:12,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [458176283] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:12,832 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:45:12,832 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 72 [2021-08-21 18:45:12,832 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064725603] [2021-08-21 18:45:12,832 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-08-21 18:45:12,832 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:45:12,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-08-21 18:45:12,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=3913, Unknown=0, NotChecked=0, Total=5112 [2021-08-21 18:45:12,833 INFO L87 Difference]: Start difference. First operand 317 states and 329 transitions. Second operand has 72 states, 72 states have (on average 3.125) internal successors, (225), 72 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:13,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:45:13,544 INFO L93 Difference]: Finished difference Result 552 states and 570 transitions. [2021-08-21 18:45:13,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-08-21 18:45:13,544 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.125) internal successors, (225), 72 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-08-21 18:45:13,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:45:13,545 INFO L225 Difference]: With dead ends: 552 [2021-08-21 18:45:13,545 INFO L226 Difference]: Without dead ends: 552 [2021-08-21 18:45:13,546 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 134 SyntacticMatches, 1 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2666 ImplicationChecksByTransitivity, 1541.2ms TimeCoverageRelationStatistics Valid=2752, Invalid=6754, Unknown=0, NotChecked=0, Total=9506 [2021-08-21 18:45:13,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 552 states. [2021-08-21 18:45:13,549 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 552 to 308. [2021-08-21 18:45:13,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 308 states, 307 states have (on average 1.0325732899022801) internal successors, (317), 307 states have internal predecessors, (317), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:13,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 308 states to 308 states and 317 transitions. [2021-08-21 18:45:13,549 INFO L78 Accepts]: Start accepts. Automaton has 308 states and 317 transitions. Word has length 157 [2021-08-21 18:45:13,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:45:13,549 INFO L470 AbstractCegarLoop]: Abstraction has 308 states and 317 transitions. [2021-08-21 18:45:13,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.125) internal successors, (225), 72 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:13,549 INFO L276 IsEmpty]: Start isEmpty. Operand 308 states and 317 transitions. [2021-08-21 18:45:13,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 158 [2021-08-21 18:45:13,550 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:45:13,550 INFO L512 BasicCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 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 18:45:13,587 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Ended with exit code 0 [2021-08-21 18:45:13,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,89 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:13,751 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:45:13,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:45:13,751 INFO L82 PathProgramCache]: Analyzing trace with hash 1599852414, now seen corresponding path program 88 times [2021-08-21 18:45:13,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:45:13,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755232390] [2021-08-21 18:45:13,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:45:13,751 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:45:13,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:14,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 782 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:14,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:45:14,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755232390] [2021-08-21 18:45:14,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755232390] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:14,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697134391] [2021-08-21 18:45:14,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:45:14,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:14,546 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:45:14,547 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 18:45:14,547 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 18:45:21,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:45:21,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:45:21,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 48 conjunts are in the unsatisfiable core [2021-08-21 18:45:21,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:45:22,750 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 782 proven. 715 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:22,751 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [697134391] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:22,751 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:45:22,751 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 72 [2021-08-21 18:45:22,751 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829414161] [2021-08-21 18:45:22,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-08-21 18:45:22,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:45:22,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-08-21 18:45:22,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1199, Invalid=3913, Unknown=0, NotChecked=0, Total=5112 [2021-08-21 18:45:22,752 INFO L87 Difference]: Start difference. First operand 308 states and 317 transitions. Second operand has 72 states, 72 states have (on average 3.125) internal successors, (225), 72 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:23,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:45:23,410 INFO L93 Difference]: Finished difference Result 520 states and 529 transitions. [2021-08-21 18:45:23,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-08-21 18:45:23,411 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 3.125) internal successors, (225), 72 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 157 [2021-08-21 18:45:23,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:45:23,412 INFO L225 Difference]: With dead ends: 520 [2021-08-21 18:45:23,412 INFO L226 Difference]: Without dead ends: 313 [2021-08-21 18:45:23,413 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 229 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1794 ImplicationChecksByTransitivity, 1940.9ms TimeCoverageRelationStatistics Valid=2123, Invalid=6997, Unknown=0, NotChecked=0, Total=9120 [2021-08-21 18:45:23,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2021-08-21 18:45:23,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 311. [2021-08-21 18:45:23,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 311 states, 310 states have (on average 1.032258064516129) internal successors, (320), 310 states have internal predecessors, (320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:23,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 311 states to 311 states and 320 transitions. [2021-08-21 18:45:23,415 INFO L78 Accepts]: Start accepts. Automaton has 311 states and 320 transitions. Word has length 157 [2021-08-21 18:45:23,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:45:23,415 INFO L470 AbstractCegarLoop]: Abstraction has 311 states and 320 transitions. [2021-08-21 18:45:23,415 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 3.125) internal successors, (225), 72 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:23,415 INFO L276 IsEmpty]: Start isEmpty. Operand 311 states and 320 transitions. [2021-08-21 18:45:23,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-08-21 18:45:23,416 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:45:23,416 INFO L512 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 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 18:45:23,457 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 18:45:23,616 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,SelfDestructingSolverStorable92 [2021-08-21 18:45:23,616 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:45:23,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:45:23,617 INFO L82 PathProgramCache]: Analyzing trace with hash 368554916, now seen corresponding path program 89 times [2021-08-21 18:45:23,617 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:45:23,617 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017778583] [2021-08-21 18:45:23,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:45:23,617 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:45:23,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:25,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 1564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:25,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:45:25,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017778583] [2021-08-21 18:45:25,404 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017778583] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:25,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786261030] [2021-08-21 18:45:25,404 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:45:25,404 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:25,404 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:45:25,420 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 18:45:25,452 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 18:45:32,210 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-08-21 18:45:32,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:45:32,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 106 conjunts are in the unsatisfiable core [2021-08-21 18:45:32,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:45:35,347 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:45:35,347 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 65 treesize of output 39 [2021-08-21 18:45:35,375 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 1564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:35,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786261030] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:35,375 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:45:35,375 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 79 [2021-08-21 18:45:35,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69501089] [2021-08-21 18:45:35,376 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-08-21 18:45:35,376 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:45:35,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-08-21 18:45:35,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=278, Invalid=6042, Unknown=0, NotChecked=0, Total=6320 [2021-08-21 18:45:35,376 INFO L87 Difference]: Start difference. First operand 311 states and 320 transitions. Second operand has 80 states, 80 states have (on average 2.975) internal successors, (238), 79 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:36,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:45:36,857 INFO L93 Difference]: Finished difference Result 553 states and 572 transitions. [2021-08-21 18:45:36,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 18:45:36,858 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.975) internal successors, (238), 79 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-08-21 18:45:36,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:45:36,859 INFO L225 Difference]: With dead ends: 553 [2021-08-21 18:45:36,859 INFO L226 Difference]: Without dead ends: 538 [2021-08-21 18:45:36,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 133 SyntacticMatches, 1 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 664 ImplicationChecksByTransitivity, 3137.2ms TimeCoverageRelationStatistics Valid=289, Invalid=6353, Unknown=0, NotChecked=0, Total=6642 [2021-08-21 18:45:36,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 538 states. [2021-08-21 18:45:36,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 538 to 319. [2021-08-21 18:45:36,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 319 states, 318 states have (on average 1.0377358490566038) internal successors, (330), 318 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:36,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 319 states to 319 states and 330 transitions. [2021-08-21 18:45:36,862 INFO L78 Accepts]: Start accepts. Automaton has 319 states and 330 transitions. Word has length 160 [2021-08-21 18:45:36,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:45:36,862 INFO L470 AbstractCegarLoop]: Abstraction has 319 states and 330 transitions. [2021-08-21 18:45:36,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.975) internal successors, (238), 79 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:36,863 INFO L276 IsEmpty]: Start isEmpty. Operand 319 states and 330 transitions. [2021-08-21 18:45:36,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-08-21 18:45:36,863 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:45:36,863 INFO L512 BasicCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 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 18:45:36,901 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 18:45:37,063 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,91 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:37,064 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:45:37,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:45:37,064 INFO L82 PathProgramCache]: Analyzing trace with hash -914484428, now seen corresponding path program 90 times [2021-08-21 18:45:37,064 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:45:37,064 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970940823] [2021-08-21 18:45:37,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:45:37,064 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:45:37,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:38,748 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 1564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:38,748 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:45:38,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970940823] [2021-08-21 18:45:38,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970940823] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:38,748 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [967307193] [2021-08-21 18:45:38,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:45:38,748 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:38,748 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:45:38,749 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 18:45:38,749 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 18:45:45,712 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 24 check-sat command(s) [2021-08-21 18:45:45,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:45:45,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 106 conjunts are in the unsatisfiable core [2021-08-21 18:45:45,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:45:48,658 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 18:45:48,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 41 [2021-08-21 18:45:48,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1564 backedges. 0 proven. 1564 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:48,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [967307193] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:48,679 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:45:48,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 78 [2021-08-21 18:45:48,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274649313] [2021-08-21 18:45:48,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-08-21 18:45:48,679 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:45:48,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-08-21 18:45:48,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=5935, Unknown=0, NotChecked=0, Total=6162 [2021-08-21 18:45:48,680 INFO L87 Difference]: Start difference. First operand 319 states and 330 transitions. Second operand has 79 states, 79 states have (on average 3.0) internal successors, (237), 78 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:49,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:45:49,810 INFO L93 Difference]: Finished difference Result 560 states and 580 transitions. [2021-08-21 18:45:49,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 18:45:49,810 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 3.0) internal successors, (237), 78 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 160 [2021-08-21 18:45:49,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:45:49,812 INFO L225 Difference]: With dead ends: 560 [2021-08-21 18:45:49,812 INFO L226 Difference]: Without dead ends: 545 [2021-08-21 18:45:49,812 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 133 SyntacticMatches, 2 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1669 ImplicationChecksByTransitivity, 2571.5ms TimeCoverageRelationStatistics Valid=237, Invalid=6243, Unknown=0, NotChecked=0, Total=6480 [2021-08-21 18:45:49,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 545 states. [2021-08-21 18:45:49,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 545 to 329. [2021-08-21 18:45:49,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 329 states, 328 states have (on average 1.0396341463414633) internal successors, (341), 328 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 18:45:49,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 329 states to 329 states and 341 transitions. [2021-08-21 18:45:49,816 INFO L78 Accepts]: Start accepts. Automaton has 329 states and 341 transitions. Word has length 160 [2021-08-21 18:45:49,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:45:49,816 INFO L470 AbstractCegarLoop]: Abstraction has 329 states and 341 transitions. [2021-08-21 18:45:49,816 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 3.0) internal successors, (237), 78 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:49,816 INFO L276 IsEmpty]: Start isEmpty. Operand 329 states and 341 transitions. [2021-08-21 18:45:49,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-08-21 18:45:49,817 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:45:49,817 INFO L512 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 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 18:45:49,855 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-08-21 18:45:50,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,92 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:50,017 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:45:50,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:45:50,018 INFO L82 PathProgramCache]: Analyzing trace with hash 2100467134, now seen corresponding path program 91 times [2021-08-21 18:45:50,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:45:50,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472344427] [2021-08-21 18:45:50,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:45:50,018 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:45:50,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 782 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:50,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:45:50,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472344427] [2021-08-21 18:45:50,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472344427] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:50,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852012079] [2021-08-21 18:45:50,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:45:50,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:45:50,904 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:45:50,906 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 18:45:50,907 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 18:45:58,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:45:58,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 18:45:58,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:45:59,206 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 782 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:45:59,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852012079] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:45:59,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:45:59,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 75 [2021-08-21 18:45:59,207 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174858891] [2021-08-21 18:45:59,207 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-08-21 18:45:59,207 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:45:59,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-08-21 18:45:59,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=4251, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 18:45:59,208 INFO L87 Difference]: Start difference. First operand 329 states and 341 transitions. Second operand has 75 states, 75 states have (on average 3.12) internal successors, (234), 75 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:59,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:45:59,886 INFO L93 Difference]: Finished difference Result 573 states and 591 transitions. [2021-08-21 18:45:59,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-08-21 18:45:59,887 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.12) internal successors, (234), 75 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2021-08-21 18:45:59,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:45:59,888 INFO L225 Difference]: With dead ends: 573 [2021-08-21 18:45:59,888 INFO L226 Difference]: Without dead ends: 573 [2021-08-21 18:45:59,889 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 240 GetRequests, 139 SyntacticMatches, 1 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2902 ImplicationChecksByTransitivity, 1697.4ms TimeCoverageRelationStatistics Valid=2979, Invalid=7323, Unknown=0, NotChecked=0, Total=10302 [2021-08-21 18:45:59,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 573 states. [2021-08-21 18:45:59,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 573 to 320. [2021-08-21 18:45:59,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 320 states, 319 states have (on average 1.031347962382445) internal successors, (329), 319 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:59,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 320 states to 320 states and 329 transitions. [2021-08-21 18:45:59,892 INFO L78 Accepts]: Start accepts. Automaton has 320 states and 329 transitions. Word has length 163 [2021-08-21 18:45:59,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:45:59,893 INFO L470 AbstractCegarLoop]: Abstraction has 320 states and 329 transitions. [2021-08-21 18:45:59,893 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.12) internal successors, (234), 75 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:45:59,893 INFO L276 IsEmpty]: Start isEmpty. Operand 320 states and 329 transitions. [2021-08-21 18:45:59,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-08-21 18:45:59,893 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:45:59,893 INFO L512 BasicCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 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 18:45:59,930 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-08-21 18:46:00,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,93 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:00,097 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:00,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:00,097 INFO L82 PathProgramCache]: Analyzing trace with hash -680693178, now seen corresponding path program 92 times [2021-08-21 18:46:00,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:00,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364051814] [2021-08-21 18:46:00,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:00,097 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:00,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 852 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:00,985 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:00,985 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364051814] [2021-08-21 18:46:00,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364051814] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:00,986 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793145192] [2021-08-21 18:46:00,986 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:46:00,986 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:00,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:00,987 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 18:46:00,987 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 18:46:08,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:46:08,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:08,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 50 conjunts are in the unsatisfiable core [2021-08-21 18:46:08,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:09,634 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 852 proven. 782 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:09,634 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793145192] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:09,634 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:09,634 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 75 [2021-08-21 18:46:09,634 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246298937] [2021-08-21 18:46:09,635 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-08-21 18:46:09,635 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:09,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-08-21 18:46:09,635 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1299, Invalid=4251, Unknown=0, NotChecked=0, Total=5550 [2021-08-21 18:46:09,635 INFO L87 Difference]: Start difference. First operand 320 states and 329 transitions. Second operand has 75 states, 75 states have (on average 3.12) internal successors, (234), 75 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:10,315 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:10,315 INFO L93 Difference]: Finished difference Result 541 states and 550 transitions. [2021-08-21 18:46:10,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-08-21 18:46:10,316 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.12) internal successors, (234), 75 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2021-08-21 18:46:10,316 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:10,316 INFO L225 Difference]: With dead ends: 541 [2021-08-21 18:46:10,316 INFO L226 Difference]: Without dead ends: 325 [2021-08-21 18:46:10,317 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1956 ImplicationChecksByTransitivity, 2039.8ms TimeCoverageRelationStatistics Valid=2299, Invalid=7601, Unknown=0, NotChecked=0, Total=9900 [2021-08-21 18:46:10,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 325 states. [2021-08-21 18:46:10,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 325 to 323. [2021-08-21 18:46:10,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 323 states, 322 states have (on average 1.031055900621118) internal successors, (332), 322 states have internal predecessors, (332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:10,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 323 states to 323 states and 332 transitions. [2021-08-21 18:46:10,320 INFO L78 Accepts]: Start accepts. Automaton has 323 states and 332 transitions. Word has length 163 [2021-08-21 18:46:10,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:10,320 INFO L470 AbstractCegarLoop]: Abstraction has 323 states and 332 transitions. [2021-08-21 18:46:10,320 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.12) internal successors, (234), 75 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:10,320 INFO L276 IsEmpty]: Start isEmpty. Operand 323 states and 332 transitions. [2021-08-21 18:46:10,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-08-21 18:46:10,320 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:10,320 INFO L512 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 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 18:46:10,359 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 18:46:10,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,94 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:10,521 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:10,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:10,521 INFO L82 PathProgramCache]: Analyzing trace with hash -725933588, now seen corresponding path program 93 times [2021-08-21 18:46:10,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:10,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956656219] [2021-08-21 18:46:10,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:10,521 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:10,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:12,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 0 proven. 1704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:12,392 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:12,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956656219] [2021-08-21 18:46:12,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956656219] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:12,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922115140] [2021-08-21 18:46:12,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:46:12,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:12,392 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:12,395 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 18:46:12,395 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 18:46:19,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2021-08-21 18:46:19,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:19,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 110 conjunts are in the unsatisfiable core [2021-08-21 18:46:19,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:22,927 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:46:22,927 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 65 treesize of output 39 [2021-08-21 18:46:22,951 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 0 proven. 1704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:22,952 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1922115140] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:22,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:22,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 82 [2021-08-21 18:46:22,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1029835036] [2021-08-21 18:46:22,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-08-21 18:46:22,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:22,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-08-21 18:46:22,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=289, Invalid=6517, Unknown=0, NotChecked=0, Total=6806 [2021-08-21 18:46:22,953 INFO L87 Difference]: Start difference. First operand 323 states and 332 transitions. Second operand has 83 states, 83 states have (on average 2.9759036144578315) internal successors, (247), 82 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:24,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:24,596 INFO L93 Difference]: Finished difference Result 574 states and 593 transitions. [2021-08-21 18:46:24,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 18:46:24,596 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.9759036144578315) internal successors, (247), 82 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-08-21 18:46:24,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:24,597 INFO L225 Difference]: With dead ends: 574 [2021-08-21 18:46:24,598 INFO L226 Difference]: Without dead ends: 559 [2021-08-21 18:46:24,598 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 138 SyntacticMatches, 1 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 3338.8ms TimeCoverageRelationStatistics Valid=300, Invalid=6840, Unknown=0, NotChecked=0, Total=7140 [2021-08-21 18:46:24,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 559 states. [2021-08-21 18:46:24,601 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 559 to 331. [2021-08-21 18:46:24,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 331 states, 330 states have (on average 1.0363636363636364) internal successors, (342), 330 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:24,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 331 states to 331 states and 342 transitions. [2021-08-21 18:46:24,601 INFO L78 Accepts]: Start accepts. Automaton has 331 states and 342 transitions. Word has length 166 [2021-08-21 18:46:24,601 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:24,601 INFO L470 AbstractCegarLoop]: Abstraction has 331 states and 342 transitions. [2021-08-21 18:46:24,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.9759036144578315) internal successors, (247), 82 states have internal predecessors, (247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:24,601 INFO L276 IsEmpty]: Start isEmpty. Operand 331 states and 342 transitions. [2021-08-21 18:46:24,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-08-21 18:46:24,602 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:24,602 INFO L512 BasicCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 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 18:46:24,641 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 18:46:24,803 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,SelfDestructingSolverStorable97 [2021-08-21 18:46:24,803 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:24,803 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:24,803 INFO L82 PathProgramCache]: Analyzing trace with hash -921094958, now seen corresponding path program 94 times [2021-08-21 18:46:24,803 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:24,803 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825121939] [2021-08-21 18:46:24,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:24,803 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:24,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 0 proven. 1704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:26,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:26,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825121939] [2021-08-21 18:46:26,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825121939] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:26,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572516138] [2021-08-21 18:46:26,561 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:46:26,561 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:26,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:26,562 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 18:46:26,563 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 18:46:34,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:46:34,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:34,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 110 conjunts are in the unsatisfiable core [2021-08-21 18:46:34,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:37,084 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 18:46:37,084 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 41 [2021-08-21 18:46:37,105 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 0 proven. 1704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:37,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [572516138] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:37,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:37,105 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 81 [2021-08-21 18:46:37,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [267771891] [2021-08-21 18:46:37,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-08-21 18:46:37,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:37,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-08-21 18:46:37,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=236, Invalid=6406, Unknown=0, NotChecked=0, Total=6642 [2021-08-21 18:46:37,106 INFO L87 Difference]: Start difference. First operand 331 states and 342 transitions. Second operand has 82 states, 82 states have (on average 3.0) internal successors, (246), 81 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:38,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:38,727 INFO L93 Difference]: Finished difference Result 581 states and 601 transitions. [2021-08-21 18:46:38,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 18:46:38,727 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 3.0) internal successors, (246), 81 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 166 [2021-08-21 18:46:38,727 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:38,729 INFO L225 Difference]: With dead ends: 581 [2021-08-21 18:46:38,729 INFO L226 Difference]: Without dead ends: 566 [2021-08-21 18:46:38,729 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 138 SyntacticMatches, 2 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1801 ImplicationChecksByTransitivity, 2722.0ms TimeCoverageRelationStatistics Valid=246, Invalid=6726, Unknown=0, NotChecked=0, Total=6972 [2021-08-21 18:46:38,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 566 states. [2021-08-21 18:46:38,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 566 to 341. [2021-08-21 18:46:38,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.0382352941176471) internal successors, (353), 340 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:38,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 353 transitions. [2021-08-21 18:46:38,732 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 353 transitions. Word has length 166 [2021-08-21 18:46:38,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:38,733 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 353 transitions. [2021-08-21 18:46:38,733 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 3.0) internal successors, (246), 81 states have internal predecessors, (246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:38,733 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 353 transitions. [2021-08-21 18:46:38,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-08-21 18:46:38,733 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:38,733 INFO L512 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 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 18:46:38,772 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 18:46:38,934 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,SelfDestructingSolverStorable98 [2021-08-21 18:46:38,934 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:38,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:38,934 INFO L82 PathProgramCache]: Analyzing trace with hash 136743046, now seen corresponding path program 95 times [2021-08-21 18:46:38,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:38,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404190692] [2021-08-21 18:46:38,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:38,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:38,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:39,813 INFO L134 CoverageAnalysis]: Checked inductivity of 1777 backedges. 852 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:39,814 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:39,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404190692] [2021-08-21 18:46:39,814 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404190692] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:39,814 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765424133] [2021-08-21 18:46:39,814 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:46:39,814 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:39,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:39,815 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 18:46:39,815 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 18:46:47,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2021-08-21 18:46:47,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:47,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 18:46:47,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 1777 backedges. 852 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:48,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765424133] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:48,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:48,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 78 [2021-08-21 18:46:48,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [164697828] [2021-08-21 18:46:48,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-08-21 18:46:48,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:48,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-08-21 18:46:48,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1403, Invalid=4603, Unknown=0, NotChecked=0, Total=6006 [2021-08-21 18:46:48,722 INFO L87 Difference]: Start difference. First operand 341 states and 353 transitions. Second operand has 78 states, 78 states have (on average 3.1153846153846154) internal successors, (243), 78 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:49,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:46:49,441 INFO L93 Difference]: Finished difference Result 594 states and 612 transitions. [2021-08-21 18:46:49,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-08-21 18:46:49,441 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.1153846153846154) internal successors, (243), 78 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-08-21 18:46:49,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:46:49,443 INFO L225 Difference]: With dead ends: 594 [2021-08-21 18:46:49,443 INFO L226 Difference]: Without dead ends: 594 [2021-08-21 18:46:49,444 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 249 GetRequests, 144 SyntacticMatches, 1 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3148 ImplicationChecksByTransitivity, 1762.4ms TimeCoverageRelationStatistics Valid=3215, Invalid=7915, Unknown=0, NotChecked=0, Total=11130 [2021-08-21 18:46:49,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 594 states. [2021-08-21 18:46:49,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 594 to 332. [2021-08-21 18:46:49,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 332 states, 331 states have (on average 1.0302114803625377) internal successors, (341), 331 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 18:46:49,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 332 states to 332 states and 341 transitions. [2021-08-21 18:46:49,447 INFO L78 Accepts]: Start accepts. Automaton has 332 states and 341 transitions. Word has length 169 [2021-08-21 18:46:49,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:46:49,447 INFO L470 AbstractCegarLoop]: Abstraction has 332 states and 341 transitions. [2021-08-21 18:46:49,447 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.1153846153846154) internal successors, (243), 78 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:46:49,447 INFO L276 IsEmpty]: Start isEmpty. Operand 332 states and 341 transitions. [2021-08-21 18:46:49,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 170 [2021-08-21 18:46:49,448 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:46:49,448 INFO L512 BasicCegarLoop]: trace histogram [25, 25, 25, 24, 24, 24, 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 18:46:49,488 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-08-21 18:46:49,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-08-21 18:46:49,648 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:46:49,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:46:49,649 INFO L82 PathProgramCache]: Analyzing trace with hash 803995390, now seen corresponding path program 96 times [2021-08-21 18:46:49,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:46:49,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835818735] [2021-08-21 18:46:49,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:46:49,649 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:46:49,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:46:50,583 INFO L134 CoverageAnalysis]: Checked inductivity of 1777 backedges. 925 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:50,583 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:46:50,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835818735] [2021-08-21 18:46:50,583 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835818735] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:50,583 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708295213] [2021-08-21 18:46:50,583 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:46:50,584 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:46:50,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:46:50,584 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 18:46:50,585 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 18:46:58,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2021-08-21 18:46:58,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:46:58,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 52 conjunts are in the unsatisfiable core [2021-08-21 18:46:58,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:46:59,901 INFO L134 CoverageAnalysis]: Checked inductivity of 1777 backedges. 925 proven. 852 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:46:59,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708295213] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:46:59,901 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:46:59,901 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 78 [2021-08-21 18:46:59,901 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032167773] [2021-08-21 18:46:59,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-08-21 18:46:59,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:46:59,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-08-21 18:46:59,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1403, Invalid=4603, Unknown=0, NotChecked=0, Total=6006 [2021-08-21 18:46:59,902 INFO L87 Difference]: Start difference. First operand 332 states and 341 transitions. Second operand has 78 states, 78 states have (on average 3.1153846153846154) internal successors, (243), 78 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:00,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:00,628 INFO L93 Difference]: Finished difference Result 562 states and 571 transitions. [2021-08-21 18:47:00,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-08-21 18:47:00,629 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.1153846153846154) internal successors, (243), 78 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 169 [2021-08-21 18:47:00,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:00,629 INFO L225 Difference]: With dead ends: 562 [2021-08-21 18:47:00,630 INFO L226 Difference]: Without dead ends: 337 [2021-08-21 18:47:00,631 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2125 ImplicationChecksByTransitivity, 2204.1ms TimeCoverageRelationStatistics Valid=2482, Invalid=8230, Unknown=0, NotChecked=0, Total=10712 [2021-08-21 18:47:00,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 337 states. [2021-08-21 18:47:00,633 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 337 to 335. [2021-08-21 18:47:00,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 335 states, 334 states have (on average 1.029940119760479) internal successors, (344), 334 states have internal predecessors, (344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:00,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 335 states to 335 states and 344 transitions. [2021-08-21 18:47:00,633 INFO L78 Accepts]: Start accepts. Automaton has 335 states and 344 transitions. Word has length 169 [2021-08-21 18:47:00,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:00,633 INFO L470 AbstractCegarLoop]: Abstraction has 335 states and 344 transitions. [2021-08-21 18:47:00,633 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.1153846153846154) internal successors, (243), 78 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:00,634 INFO L276 IsEmpty]: Start isEmpty. Operand 335 states and 344 transitions. [2021-08-21 18:47:00,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-08-21 18:47:00,634 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:00,634 INFO L512 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 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 18:47:00,677 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-08-21 18:47:00,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,98 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:00,841 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:00,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:00,841 INFO L82 PathProgramCache]: Analyzing trace with hash -280700380, now seen corresponding path program 97 times [2021-08-21 18:47:00,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:00,841 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880993415] [2021-08-21 18:47:00,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:00,841 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:00,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:02,783 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 0 proven. 1850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:02,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:02,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880993415] [2021-08-21 18:47:02,784 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880993415] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:02,784 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058803255] [2021-08-21 18:47:02,784 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:47:02,784 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:02,784 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:02,789 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 18:47:02,798 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 18:47:10,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:10,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 114 conjunts are in the unsatisfiable core [2021-08-21 18:47:10,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:14,063 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:47:14,063 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 65 treesize of output 39 [2021-08-21 18:47:14,108 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 0 proven. 1850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:14,108 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058803255] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:14,108 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:14,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 85 [2021-08-21 18:47:14,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873122331] [2021-08-21 18:47:14,109 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-08-21 18:47:14,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:14,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-08-21 18:47:14,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=7010, Unknown=0, NotChecked=0, Total=7310 [2021-08-21 18:47:14,109 INFO L87 Difference]: Start difference. First operand 335 states and 344 transitions. Second operand has 86 states, 86 states have (on average 2.9767441860465116) internal successors, (256), 85 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:15,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:15,825 INFO L93 Difference]: Finished difference Result 595 states and 614 transitions. [2021-08-21 18:47:15,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 18:47:15,825 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.9767441860465116) internal successors, (256), 85 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2021-08-21 18:47:15,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:15,826 INFO L225 Difference]: With dead ends: 595 [2021-08-21 18:47:15,826 INFO L226 Difference]: Without dead ends: 580 [2021-08-21 18:47:15,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 143 SyntacticMatches, 1 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 745 ImplicationChecksByTransitivity, 3485.5ms TimeCoverageRelationStatistics Valid=311, Invalid=7345, Unknown=0, NotChecked=0, Total=7656 [2021-08-21 18:47:15,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 580 states. [2021-08-21 18:47:15,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 580 to 343. [2021-08-21 18:47:15,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 1.0350877192982457) internal successors, (354), 342 states have internal predecessors, (354), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:15,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 354 transitions. [2021-08-21 18:47:15,830 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 354 transitions. Word has length 172 [2021-08-21 18:47:15,830 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:15,830 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 354 transitions. [2021-08-21 18:47:15,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.9767441860465116) internal successors, (256), 85 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:15,830 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 354 transitions. [2021-08-21 18:47:15,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-08-21 18:47:15,831 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:15,831 INFO L512 BasicCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 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 18:47:15,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-08-21 18:47:16,031 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,SelfDestructingSolverStorable101 [2021-08-21 18:47:16,031 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:16,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:16,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1326353932, now seen corresponding path program 98 times [2021-08-21 18:47:16,031 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:16,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041338484] [2021-08-21 18:47:16,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:16,032 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:16,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:17,935 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 0 proven. 1850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:17,936 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:17,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041338484] [2021-08-21 18:47:17,936 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041338484] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:17,936 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111699816] [2021-08-21 18:47:17,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:47:17,936 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:17,936 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:17,937 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 18:47:17,937 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 18:47:25,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:47:25,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:26,000 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 116 conjunts are in the unsatisfiable core [2021-08-21 18:47:26,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:29,178 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:47:29,178 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 67 treesize of output 39 [2021-08-21 18:47:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 1850 backedges. 0 proven. 1850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:29,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2111699816] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:29,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:29,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 58] total 86 [2021-08-21 18:47:29,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [157065653] [2021-08-21 18:47:29,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-08-21 18:47:29,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:29,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-08-21 18:47:29,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=225, Invalid=7257, Unknown=0, NotChecked=0, Total=7482 [2021-08-21 18:47:29,205 INFO L87 Difference]: Start difference. First operand 343 states and 354 transitions. Second operand has 87 states, 87 states have (on average 2.942528735632184) internal successors, (256), 86 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:32,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:32,336 INFO L93 Difference]: Finished difference Result 617 states and 640 transitions. [2021-08-21 18:47:32,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 18:47:32,336 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.942528735632184) internal successors, (256), 86 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 172 [2021-08-21 18:47:32,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:32,337 INFO L225 Difference]: With dead ends: 617 [2021-08-21 18:47:32,337 INFO L226 Difference]: Without dead ends: 602 [2021-08-21 18:47:32,338 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 142 SyntacticMatches, 1 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2742 ImplicationChecksByTransitivity, 4560.7ms TimeCoverageRelationStatistics Valid=423, Invalid=12687, Unknown=0, NotChecked=0, Total=13110 [2021-08-21 18:47:32,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 602 states. [2021-08-21 18:47:32,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 602 to 353. [2021-08-21 18:47:32,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 353 states, 352 states have (on average 1.0369318181818181) internal successors, (365), 352 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:32,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 353 states to 353 states and 365 transitions. [2021-08-21 18:47:32,341 INFO L78 Accepts]: Start accepts. Automaton has 353 states and 365 transitions. Word has length 172 [2021-08-21 18:47:32,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:32,341 INFO L470 AbstractCegarLoop]: Abstraction has 353 states and 365 transitions. [2021-08-21 18:47:32,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.942528735632184) internal successors, (256), 86 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:32,342 INFO L276 IsEmpty]: Start isEmpty. Operand 353 states and 365 transitions. [2021-08-21 18:47:32,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-08-21 18:47:32,342 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:32,342 INFO L512 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 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 18:47:32,383 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 18:47:32,549 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,100 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:32,550 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:32,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:32,550 INFO L82 PathProgramCache]: Analyzing trace with hash 881550654, now seen corresponding path program 99 times [2021-08-21 18:47:32,550 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:32,550 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1860042084] [2021-08-21 18:47:32,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:32,550 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:32,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:33,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 925 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:33,510 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:33,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1860042084] [2021-08-21 18:47:33,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1860042084] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:33,510 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726199021] [2021-08-21 18:47:33,510 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:47:33,510 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:33,510 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:33,511 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 18:47:33,555 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 18:47:41,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-08-21 18:47:41,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:41,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-21 18:47:41,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:42,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 925 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:42,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726199021] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:42,976 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:42,976 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 81 [2021-08-21 18:47:42,976 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1149295721] [2021-08-21 18:47:42,976 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-08-21 18:47:42,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:42,977 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-08-21 18:47:42,977 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1511, Invalid=4969, Unknown=0, NotChecked=0, Total=6480 [2021-08-21 18:47:42,978 INFO L87 Difference]: Start difference. First operand 353 states and 365 transitions. Second operand has 81 states, 81 states have (on average 3.111111111111111) internal successors, (252), 81 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:43,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:43,831 INFO L93 Difference]: Finished difference Result 615 states and 633 transitions. [2021-08-21 18:47:43,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-08-21 18:47:43,831 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.111111111111111) internal successors, (252), 81 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-08-21 18:47:43,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:43,832 INFO L225 Difference]: With dead ends: 615 [2021-08-21 18:47:43,832 INFO L226 Difference]: Without dead ends: 615 [2021-08-21 18:47:43,833 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 149 SyntacticMatches, 1 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3404 ImplicationChecksByTransitivity, 1873.7ms TimeCoverageRelationStatistics Valid=3460, Invalid=8530, Unknown=0, NotChecked=0, Total=11990 [2021-08-21 18:47:43,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 615 states. [2021-08-21 18:47:43,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 615 to 344. [2021-08-21 18:47:43,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 344 states, 343 states have (on average 1.0291545189504374) internal successors, (353), 343 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:43,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 344 states to 344 states and 353 transitions. [2021-08-21 18:47:43,836 INFO L78 Accepts]: Start accepts. Automaton has 344 states and 353 transitions. Word has length 175 [2021-08-21 18:47:43,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:43,836 INFO L470 AbstractCegarLoop]: Abstraction has 344 states and 353 transitions. [2021-08-21 18:47:43,836 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.111111111111111) internal successors, (252), 81 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:43,836 INFO L276 IsEmpty]: Start isEmpty. Operand 344 states and 353 transitions. [2021-08-21 18:47:43,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-08-21 18:47:43,836 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:43,837 INFO L512 BasicCegarLoop]: trace histogram [26, 26, 26, 25, 25, 25, 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 18:47:43,878 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 18:47:44,054 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,SelfDestructingSolverStorable103 [2021-08-21 18:47:44,055 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:44,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:44,055 INFO L82 PathProgramCache]: Analyzing trace with hash 1887484870, now seen corresponding path program 100 times [2021-08-21 18:47:44,055 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:44,055 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1462810612] [2021-08-21 18:47:44,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:44,055 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:44,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:44,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 1001 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:44,980 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:44,980 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1462810612] [2021-08-21 18:47:44,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1462810612] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:44,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131938575] [2021-08-21 18:47:44,981 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:47:44,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:44,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:44,981 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 18:47:44,982 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 18:47:53,455 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:47:53,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:47:53,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 54 conjunts are in the unsatisfiable core [2021-08-21 18:47:53,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:47:55,075 INFO L134 CoverageAnalysis]: Checked inductivity of 1926 backedges. 1001 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:55,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [131938575] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:55,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:47:55,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 81 [2021-08-21 18:47:55,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125166367] [2021-08-21 18:47:55,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-08-21 18:47:55,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:47:55,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-08-21 18:47:55,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1511, Invalid=4969, Unknown=0, NotChecked=0, Total=6480 [2021-08-21 18:47:55,077 INFO L87 Difference]: Start difference. First operand 344 states and 353 transitions. Second operand has 81 states, 81 states have (on average 3.111111111111111) internal successors, (252), 81 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:55,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:47:55,857 INFO L93 Difference]: Finished difference Result 583 states and 592 transitions. [2021-08-21 18:47:55,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-08-21 18:47:55,857 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 3.111111111111111) internal successors, (252), 81 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-08-21 18:47:55,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:47:55,858 INFO L225 Difference]: With dead ends: 583 [2021-08-21 18:47:55,858 INFO L226 Difference]: Without dead ends: 349 [2021-08-21 18:47:55,859 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2301 ImplicationChecksByTransitivity, 2274.7ms TimeCoverageRelationStatistics Valid=2672, Invalid=8884, Unknown=0, NotChecked=0, Total=11556 [2021-08-21 18:47:55,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 349 states. [2021-08-21 18:47:55,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 349 to 347. [2021-08-21 18:47:55,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 347 states, 346 states have (on average 1.0289017341040463) internal successors, (356), 346 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:55,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 347 states to 347 states and 356 transitions. [2021-08-21 18:47:55,861 INFO L78 Accepts]: Start accepts. Automaton has 347 states and 356 transitions. Word has length 175 [2021-08-21 18:47:55,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:47:55,861 INFO L470 AbstractCegarLoop]: Abstraction has 347 states and 356 transitions. [2021-08-21 18:47:55,861 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 3.111111111111111) internal successors, (252), 81 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:47:55,861 INFO L276 IsEmpty]: Start isEmpty. Operand 347 states and 356 transitions. [2021-08-21 18:47:55,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-08-21 18:47:55,862 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:47:55,862 INFO L512 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 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 18:47:55,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Forceful destruction successful, exit code 0 [2021-08-21 18:47:56,062 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,102 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:56,063 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:47:56,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:47:56,063 INFO L82 PathProgramCache]: Analyzing trace with hash 481698412, now seen corresponding path program 101 times [2021-08-21 18:47:56,063 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:47:56,063 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893225471] [2021-08-21 18:47:56,063 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:47:56,063 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:47:56,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:47:58,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:47:58,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:47:58,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893225471] [2021-08-21 18:47:58,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893225471] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:47:58,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [108379372] [2021-08-21 18:47:58,207 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:47:58,207 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:47:58,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:47:58,209 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 18:47:58,210 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 18:48:06,529 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 27 check-sat command(s) [2021-08-21 18:48:06,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:06,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 118 conjunts are in the unsatisfiable core [2021-08-21 18:48:06,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:10,238 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:48:10,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 33 [2021-08-21 18:48:10,276 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:10,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [108379372] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:10,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:10,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 88 [2021-08-21 18:48:10,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036850471] [2021-08-21 18:48:10,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-08-21 18:48:10,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:10,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-08-21 18:48:10,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=311, Invalid=7521, Unknown=0, NotChecked=0, Total=7832 [2021-08-21 18:48:10,278 INFO L87 Difference]: Start difference. First operand 347 states and 356 transitions. Second operand has 89 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 88 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:12,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:12,011 INFO L93 Difference]: Finished difference Result 616 states and 635 transitions. [2021-08-21 18:48:12,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-21 18:48:12,012 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 88 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-08-21 18:48:12,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:12,012 INFO L225 Difference]: With dead ends: 616 [2021-08-21 18:48:12,013 INFO L226 Difference]: Without dead ends: 601 [2021-08-21 18:48:12,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 148 SyntacticMatches, 1 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 787 ImplicationChecksByTransitivity, 3758.6ms TimeCoverageRelationStatistics Valid=322, Invalid=7868, Unknown=0, NotChecked=0, Total=8190 [2021-08-21 18:48:12,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 601 states. [2021-08-21 18:48:12,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 601 to 355. [2021-08-21 18:48:12,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 355 states, 354 states have (on average 1.0338983050847457) internal successors, (366), 354 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:12,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 355 states to 355 states and 366 transitions. [2021-08-21 18:48:12,016 INFO L78 Accepts]: Start accepts. Automaton has 355 states and 366 transitions. Word has length 178 [2021-08-21 18:48:12,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:12,016 INFO L470 AbstractCegarLoop]: Abstraction has 355 states and 366 transitions. [2021-08-21 18:48:12,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.9775280898876404) internal successors, (265), 88 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:12,016 INFO L276 IsEmpty]: Start isEmpty. Operand 355 states and 366 transitions. [2021-08-21 18:48:12,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-08-21 18:48:12,016 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:12,017 INFO L512 BasicCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 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 18:48:12,059 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Ended with exit code 0 [2021-08-21 18:48:12,217 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,SelfDestructingSolverStorable105 [2021-08-21 18:48:12,217 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:12,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:12,217 INFO L82 PathProgramCache]: Analyzing trace with hash -1564469998, now seen corresponding path program 102 times [2021-08-21 18:48:12,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:12,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1892867959] [2021-08-21 18:48:12,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:12,218 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:12,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:14,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:14,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1892867959] [2021-08-21 18:48:14,266 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1892867959] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:14,266 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892880585] [2021-08-21 18:48:14,266 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:48:14,266 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:14,266 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:14,267 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 18:48:14,292 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 18:48:22,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-08-21 18:48:22,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:22,885 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 120 conjunts are in the unsatisfiable core [2021-08-21 18:48:22,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:26,248 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:48:26,248 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 61 treesize of output 33 [2021-08-21 18:48:26,269 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 0 proven. 2002 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:26,270 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892880585] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:26,270 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:26,270 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 60] total 89 [2021-08-21 18:48:26,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616786537] [2021-08-21 18:48:26,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-08-21 18:48:26,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:26,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-08-21 18:48:26,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=233, Invalid=7777, Unknown=0, NotChecked=0, Total=8010 [2021-08-21 18:48:26,271 INFO L87 Difference]: Start difference. First operand 355 states and 366 transitions. Second operand has 90 states, 90 states have (on average 2.9444444444444446) internal successors, (265), 89 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:29,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:29,648 INFO L93 Difference]: Finished difference Result 638 states and 661 transitions. [2021-08-21 18:48:29,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-08-21 18:48:29,649 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.9444444444444446) internal successors, (265), 89 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 178 [2021-08-21 18:48:29,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:29,650 INFO L225 Difference]: With dead ends: 638 [2021-08-21 18:48:29,650 INFO L226 Difference]: Without dead ends: 623 [2021-08-21 18:48:29,651 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 147 SyntacticMatches, 1 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2942 ImplicationChecksByTransitivity, 4750.7ms TimeCoverageRelationStatistics Valid=438, Invalid=13604, Unknown=0, NotChecked=0, Total=14042 [2021-08-21 18:48:29,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-08-21 18:48:29,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 365. [2021-08-21 18:48:29,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 365 states, 364 states have (on average 1.0357142857142858) internal successors, (377), 364 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:29,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 365 states to 365 states and 377 transitions. [2021-08-21 18:48:29,654 INFO L78 Accepts]: Start accepts. Automaton has 365 states and 377 transitions. Word has length 178 [2021-08-21 18:48:29,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:29,654 INFO L470 AbstractCegarLoop]: Abstraction has 365 states and 377 transitions. [2021-08-21 18:48:29,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.9444444444444446) internal successors, (265), 89 states have internal predecessors, (265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:29,654 INFO L276 IsEmpty]: Start isEmpty. Operand 365 states and 377 transitions. [2021-08-21 18:48:29,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-08-21 18:48:29,654 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:29,654 INFO L512 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 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 18:48:29,698 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Ended with exit code 0 [2021-08-21 18:48:29,856 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,104 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:29,856 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:29,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:29,857 INFO L82 PathProgramCache]: Analyzing trace with hash 923431430, now seen corresponding path program 103 times [2021-08-21 18:48:29,857 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:29,857 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064773394] [2021-08-21 18:48:29,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:29,857 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:29,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:31,007 INFO L134 CoverageAnalysis]: Checked inductivity of 2081 backedges. 1001 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:31,007 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:31,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064773394] [2021-08-21 18:48:31,007 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064773394] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:31,007 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068886089] [2021-08-21 18:48:31,007 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:48:31,008 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:31,008 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:31,008 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 18:48:31,009 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 18:48:39,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:39,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-21 18:48:39,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:41,118 INFO L134 CoverageAnalysis]: Checked inductivity of 2081 backedges. 1001 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:41,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068886089] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:41,118 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:41,118 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 84 [2021-08-21 18:48:41,119 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585428800] [2021-08-21 18:48:41,119 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-08-21 18:48:41,119 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:41,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-08-21 18:48:41,120 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1623, Invalid=5349, Unknown=0, NotChecked=0, Total=6972 [2021-08-21 18:48:41,120 INFO L87 Difference]: Start difference. First operand 365 states and 377 transitions. Second operand has 84 states, 84 states have (on average 3.107142857142857) internal successors, (261), 84 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:41,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:41,902 INFO L93 Difference]: Finished difference Result 636 states and 654 transitions. [2021-08-21 18:48:41,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-08-21 18:48:41,903 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.107142857142857) internal successors, (261), 84 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-08-21 18:48:41,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:41,904 INFO L225 Difference]: With dead ends: 636 [2021-08-21 18:48:41,904 INFO L226 Difference]: Without dead ends: 636 [2021-08-21 18:48:41,905 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 154 SyntacticMatches, 1 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3670 ImplicationChecksByTransitivity, 2111.6ms TimeCoverageRelationStatistics Valid=3714, Invalid=9168, Unknown=0, NotChecked=0, Total=12882 [2021-08-21 18:48:41,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 636 states. [2021-08-21 18:48:41,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 636 to 356. [2021-08-21 18:48:41,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.028169014084507) internal successors, (365), 355 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:41,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 365 transitions. [2021-08-21 18:48:41,908 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 365 transitions. Word has length 181 [2021-08-21 18:48:41,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:41,908 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 365 transitions. [2021-08-21 18:48:41,908 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.107142857142857) internal successors, (261), 84 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:41,908 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 365 transitions. [2021-08-21 18:48:41,908 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 182 [2021-08-21 18:48:41,908 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:41,908 INFO L512 BasicCegarLoop]: trace histogram [27, 27, 27, 26, 26, 26, 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 18:48:41,950 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 18:48:42,109 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,105 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:42,109 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:42,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:42,109 INFO L82 PathProgramCache]: Analyzing trace with hash -1572131202, now seen corresponding path program 104 times [2021-08-21 18:48:42,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:42,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880267386] [2021-08-21 18:48:42,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:42,109 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:42,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:43,187 INFO L134 CoverageAnalysis]: Checked inductivity of 2081 backedges. 1080 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:43,188 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:43,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880267386] [2021-08-21 18:48:43,188 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880267386] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:43,188 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279617307] [2021-08-21 18:48:43,188 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:48:43,188 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:43,188 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:43,188 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 18:48:43,189 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 18:48:52,072 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-08-21 18:48:52,072 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:48:52,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 319 conjuncts, 56 conjunts are in the unsatisfiable core [2021-08-21 18:48:52,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:48:53,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2081 backedges. 1080 proven. 1001 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:53,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279617307] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:53,776 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:48:53,776 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 84 [2021-08-21 18:48:53,776 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734988047] [2021-08-21 18:48:53,776 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-08-21 18:48:53,776 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:48:53,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-08-21 18:48:53,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1623, Invalid=5349, Unknown=0, NotChecked=0, Total=6972 [2021-08-21 18:48:53,777 INFO L87 Difference]: Start difference. First operand 356 states and 365 transitions. Second operand has 84 states, 84 states have (on average 3.107142857142857) internal successors, (261), 84 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:54,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:48:54,607 INFO L93 Difference]: Finished difference Result 604 states and 613 transitions. [2021-08-21 18:48:54,608 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-08-21 18:48:54,608 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 3.107142857142857) internal successors, (261), 84 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 181 [2021-08-21 18:48:54,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:48:54,608 INFO L225 Difference]: With dead ends: 604 [2021-08-21 18:48:54,608 INFO L226 Difference]: Without dead ends: 361 [2021-08-21 18:48:54,609 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 265 GetRequests, 155 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2484 ImplicationChecksByTransitivity, 2552.1ms TimeCoverageRelationStatistics Valid=2869, Invalid=9563, Unknown=0, NotChecked=0, Total=12432 [2021-08-21 18:48:54,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 361 states. [2021-08-21 18:48:54,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 361 to 359. [2021-08-21 18:48:54,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 359 states, 358 states have (on average 1.0279329608938548) internal successors, (368), 358 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:54,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 359 states to 359 states and 368 transitions. [2021-08-21 18:48:54,611 INFO L78 Accepts]: Start accepts. Automaton has 359 states and 368 transitions. Word has length 181 [2021-08-21 18:48:54,611 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:48:54,611 INFO L470 AbstractCegarLoop]: Abstraction has 359 states and 368 transitions. [2021-08-21 18:48:54,611 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 3.107142857142857) internal successors, (261), 84 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:48:54,611 INFO L276 IsEmpty]: Start isEmpty. Operand 359 states and 368 transitions. [2021-08-21 18:48:54,612 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-08-21 18:48:54,612 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:48:54,612 INFO L512 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 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 18:48:54,658 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 18:48:54,812 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,SelfDestructingSolverStorable108 [2021-08-21 18:48:54,812 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:48:54,813 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:48:54,813 INFO L82 PathProgramCache]: Analyzing trace with hash -1683586908, now seen corresponding path program 105 times [2021-08-21 18:48:54,813 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:48:54,813 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1882118071] [2021-08-21 18:48:54,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:48:54,813 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:48:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:48:56,959 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 0 proven. 2160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:48:56,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:48:56,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1882118071] [2021-08-21 18:48:56,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1882118071] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:48:56,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1642300635] [2021-08-21 18:48:56,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-08-21 18:48:56,959 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:48:56,959 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:48:56,960 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 18:48:56,960 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 18:49:05,973 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-08-21 18:49:05,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:05,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 122 conjunts are in the unsatisfiable core [2021-08-21 18:49:05,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:09,860 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:49:09,860 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 65 treesize of output 39 [2021-08-21 18:49:09,885 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 0 proven. 2160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:09,885 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1642300635] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:09,885 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:09,885 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 91 [2021-08-21 18:49:09,885 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783557712] [2021-08-21 18:49:09,886 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-08-21 18:49:09,886 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:09,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-08-21 18:49:09,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=322, Invalid=8050, Unknown=0, NotChecked=0, Total=8372 [2021-08-21 18:49:09,887 INFO L87 Difference]: Start difference. First operand 359 states and 368 transitions. Second operand has 92 states, 92 states have (on average 2.9782608695652173) internal successors, (274), 91 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:11,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:11,912 INFO L93 Difference]: Finished difference Result 637 states and 656 transitions. [2021-08-21 18:49:11,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-21 18:49:11,913 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.9782608695652173) internal successors, (274), 91 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-08-21 18:49:11,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:11,914 INFO L225 Difference]: With dead ends: 637 [2021-08-21 18:49:11,914 INFO L226 Difference]: Without dead ends: 622 [2021-08-21 18:49:11,914 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 153 SyntacticMatches, 1 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 830 ImplicationChecksByTransitivity, 3981.3ms TimeCoverageRelationStatistics Valid=333, Invalid=8409, Unknown=0, NotChecked=0, Total=8742 [2021-08-21 18:49:11,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 622 states. [2021-08-21 18:49:11,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 622 to 367. [2021-08-21 18:49:11,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 367 states, 366 states have (on average 1.0327868852459017) internal successors, (378), 366 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:11,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 367 states to 367 states and 378 transitions. [2021-08-21 18:49:11,917 INFO L78 Accepts]: Start accepts. Automaton has 367 states and 378 transitions. Word has length 184 [2021-08-21 18:49:11,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:11,917 INFO L470 AbstractCegarLoop]: Abstraction has 367 states and 378 transitions. [2021-08-21 18:49:11,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.9782608695652173) internal successors, (274), 91 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:11,917 INFO L276 IsEmpty]: Start isEmpty. Operand 367 states and 378 transitions. [2021-08-21 18:49:11,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-08-21 18:49:11,918 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:11,918 INFO L512 BasicCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 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 18:49:11,961 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 18:49:12,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,107 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:12,119 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:12,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:12,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1300111540, now seen corresponding path program 106 times [2021-08-21 18:49:12,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:12,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618580955] [2021-08-21 18:49:12,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:12,120 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:12,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:14,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 0 proven. 2160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:14,227 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:14,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618580955] [2021-08-21 18:49:14,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618580955] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:14,227 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138240695] [2021-08-21 18:49:14,227 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-08-21 18:49:14,228 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:14,228 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:14,229 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 18:49:14,229 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 18:49:23,416 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-08-21 18:49:23,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:23,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 324 conjuncts, 122 conjunts are in the unsatisfiable core [2021-08-21 18:49:23,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:26,972 INFO L354 Elim1Store]: treesize reduction 26, result has 10.3 percent of original size [2021-08-21 18:49:26,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 56 treesize of output 41 [2021-08-21 18:49:26,992 INFO L134 CoverageAnalysis]: Checked inductivity of 2160 backedges. 0 proven. 2160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:26,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2138240695] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:26,993 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:26,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 90 [2021-08-21 18:49:26,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044467264] [2021-08-21 18:49:26,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-08-21 18:49:26,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:26,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-08-21 18:49:26,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=263, Invalid=7927, Unknown=0, NotChecked=0, Total=8190 [2021-08-21 18:49:26,994 INFO L87 Difference]: Start difference. First operand 367 states and 378 transitions. Second operand has 91 states, 91 states have (on average 3.0) internal successors, (273), 90 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:28,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:28,729 INFO L93 Difference]: Finished difference Result 644 states and 664 transitions. [2021-08-21 18:49:28,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-08-21 18:49:28,730 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 3.0) internal successors, (273), 90 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 184 [2021-08-21 18:49:28,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:28,730 INFO L225 Difference]: With dead ends: 644 [2021-08-21 18:49:28,730 INFO L226 Difference]: Without dead ends: 629 [2021-08-21 18:49:28,731 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 246 GetRequests, 153 SyntacticMatches, 2 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2227 ImplicationChecksByTransitivity, 3359.0ms TimeCoverageRelationStatistics Valid=273, Invalid=8283, Unknown=0, NotChecked=0, Total=8556 [2021-08-21 18:49:28,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 629 states. [2021-08-21 18:49:28,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 629 to 377. [2021-08-21 18:49:28,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 377 states, 376 states have (on average 1.0345744680851063) internal successors, (389), 376 states have internal predecessors, (389), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:28,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 377 states to 377 states and 389 transitions. [2021-08-21 18:49:28,734 INFO L78 Accepts]: Start accepts. Automaton has 377 states and 389 transitions. Word has length 184 [2021-08-21 18:49:28,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:28,734 INFO L470 AbstractCegarLoop]: Abstraction has 377 states and 389 transitions. [2021-08-21 18:49:28,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 3.0) internal successors, (273), 90 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:28,734 INFO L276 IsEmpty]: Start isEmpty. Operand 377 states and 389 transitions. [2021-08-21 18:49:28,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-08-21 18:49:28,734 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:28,735 INFO L512 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 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 18:49:28,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-08-21 18:49:28,935 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,108 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:28,935 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:28,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:28,935 INFO L82 PathProgramCache]: Analyzing trace with hash -2050804546, now seen corresponding path program 107 times [2021-08-21 18:49:28,935 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:28,935 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567020305] [2021-08-21 18:49:28,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:28,936 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:28,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:29,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2242 backedges. 1080 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:29,981 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:29,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567020305] [2021-08-21 18:49:29,981 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567020305] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:29,981 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858557762] [2021-08-21 18:49:29,981 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-08-21 18:49:29,981 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:29,981 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:29,982 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 18:49:29,982 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 18:49:39,459 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-08-21 18:49:39,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:39,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:49:39,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:40,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2242 backedges. 1080 proven. 1162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:40,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858557762] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:40,853 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:40,853 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 87 [2021-08-21 18:49:40,853 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184825286] [2021-08-21 18:49:40,853 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-08-21 18:49:40,853 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:40,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-08-21 18:49:40,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1739, Invalid=5743, Unknown=0, NotChecked=0, Total=7482 [2021-08-21 18:49:40,854 INFO L87 Difference]: Start difference. First operand 377 states and 389 transitions. Second operand has 87 states, 87 states have (on average 3.103448275862069) internal successors, (270), 87 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:41,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:41,702 INFO L93 Difference]: Finished difference Result 657 states and 675 transitions. [2021-08-21 18:49:41,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-08-21 18:49:41,703 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.103448275862069) internal successors, (270), 87 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-08-21 18:49:41,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:41,704 INFO L225 Difference]: With dead ends: 657 [2021-08-21 18:49:41,704 INFO L226 Difference]: Without dead ends: 657 [2021-08-21 18:49:41,705 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 276 GetRequests, 159 SyntacticMatches, 1 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3946 ImplicationChecksByTransitivity, 2105.3ms TimeCoverageRelationStatistics Valid=3977, Invalid=9829, Unknown=0, NotChecked=0, Total=13806 [2021-08-21 18:49:41,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 657 states. [2021-08-21 18:49:41,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 657 to 368. [2021-08-21 18:49:41,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 368 states, 367 states have (on average 1.0272479564032697) internal successors, (377), 367 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:41,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 368 states to 368 states and 377 transitions. [2021-08-21 18:49:41,708 INFO L78 Accepts]: Start accepts. Automaton has 368 states and 377 transitions. Word has length 187 [2021-08-21 18:49:41,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:41,708 INFO L470 AbstractCegarLoop]: Abstraction has 368 states and 377 transitions. [2021-08-21 18:49:41,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.103448275862069) internal successors, (270), 87 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:41,708 INFO L276 IsEmpty]: Start isEmpty. Operand 368 states and 377 transitions. [2021-08-21 18:49:41,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2021-08-21 18:49:41,708 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:41,709 INFO L512 BasicCegarLoop]: trace histogram [28, 28, 28, 27, 27, 27, 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 18:49:41,765 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Ended with exit code 0 [2021-08-21 18:49:41,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,109 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:41,909 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:41,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:41,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1473280698, now seen corresponding path program 108 times [2021-08-21 18:49:41,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:41,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696383385] [2021-08-21 18:49:41,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:41,910 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:41,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:43,038 INFO L134 CoverageAnalysis]: Checked inductivity of 2242 backedges. 1162 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:43,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:43,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696383385] [2021-08-21 18:49:43,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696383385] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:43,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359880846] [2021-08-21 18:49:43,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-08-21 18:49:43,039 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:43,039 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:43,040 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 18:49:43,040 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 18:49:52,451 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2021-08-21 18:49:52,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-08-21 18:49:52,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 58 conjunts are in the unsatisfiable core [2021-08-21 18:49:52,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:49:54,247 INFO L134 CoverageAnalysis]: Checked inductivity of 2242 backedges. 1162 proven. 1080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:54,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359880846] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:54,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:49:54,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 87 [2021-08-21 18:49:54,248 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599897092] [2021-08-21 18:49:54,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-08-21 18:49:54,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:49:54,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-08-21 18:49:54,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1739, Invalid=5743, Unknown=0, NotChecked=0, Total=7482 [2021-08-21 18:49:54,250 INFO L87 Difference]: Start difference. First operand 368 states and 377 transitions. Second operand has 87 states, 87 states have (on average 3.103448275862069) internal successors, (270), 87 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:55,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:49:55,096 INFO L93 Difference]: Finished difference Result 625 states and 634 transitions. [2021-08-21 18:49:55,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-08-21 18:49:55,096 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 3.103448275862069) internal successors, (270), 87 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 187 [2021-08-21 18:49:55,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:49:55,097 INFO L225 Difference]: With dead ends: 625 [2021-08-21 18:49:55,097 INFO L226 Difference]: Without dead ends: 373 [2021-08-21 18:49:55,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2674 ImplicationChecksByTransitivity, 2711.1ms TimeCoverageRelationStatistics Valid=3073, Invalid=10267, Unknown=0, NotChecked=0, Total=13340 [2021-08-21 18:49:55,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 373 states. [2021-08-21 18:49:55,099 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 373 to 371. [2021-08-21 18:49:55,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 371 states, 370 states have (on average 1.027027027027027) internal successors, (380), 370 states have internal predecessors, (380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:55,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 371 states to 371 states and 380 transitions. [2021-08-21 18:49:55,100 INFO L78 Accepts]: Start accepts. Automaton has 371 states and 380 transitions. Word has length 187 [2021-08-21 18:49:55,100 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:49:55,100 INFO L470 AbstractCegarLoop]: Abstraction has 371 states and 380 transitions. [2021-08-21 18:49:55,100 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 3.103448275862069) internal successors, (270), 87 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:49:55,100 INFO L276 IsEmpty]: Start isEmpty. Operand 371 states and 380 transitions. [2021-08-21 18:49:55,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-08-21 18:49:55,101 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:49:55,101 INFO L512 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 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 18:49:55,147 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Forceful destruction successful, exit code 0 [2021-08-21 18:49:55,301 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,SelfDestructingSolverStorable112 [2021-08-21 18:49:55,301 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:49:55,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:49:55,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1972231444, now seen corresponding path program 109 times [2021-08-21 18:49:55,301 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:49:55,301 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810813501] [2021-08-21 18:49:55,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:49:55,302 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:49:55,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:49:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 0 proven. 2324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:49:57,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:49:57,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810813501] [2021-08-21 18:49:57,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1810813501] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:49:57,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768437411] [2021-08-21 18:49:57,682 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-08-21 18:49:57,682 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:49:57,682 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:49:57,683 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 18:49:57,683 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 18:50:07,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:07,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 334 conjuncts, 126 conjunts are in the unsatisfiable core [2021-08-21 18:50:07,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-08-21 18:50:11,732 INFO L354 Elim1Store]: treesize reduction 9, result has 10.0 percent of original size [2021-08-21 18:50:11,733 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 65 treesize of output 39 [2021-08-21 18:50:11,764 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 0 proven. 2324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:11,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1768437411] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:11,764 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-08-21 18:50:11,764 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 94 [2021-08-21 18:50:11,764 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853393885] [2021-08-21 18:50:11,764 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-08-21 18:50:11,765 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-08-21 18:50:11,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-08-21 18:50:11,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=333, Invalid=8597, Unknown=0, NotChecked=0, Total=8930 [2021-08-21 18:50:11,766 INFO L87 Difference]: Start difference. First operand 371 states and 380 transitions. Second operand has 95 states, 95 states have (on average 2.9789473684210526) internal successors, (283), 94 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:13,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-08-21 18:50:13,707 INFO L93 Difference]: Finished difference Result 658 states and 677 transitions. [2021-08-21 18:50:13,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-08-21 18:50:13,707 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.9789473684210526) internal successors, (283), 94 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 190 [2021-08-21 18:50:13,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-08-21 18:50:13,708 INFO L225 Difference]: With dead ends: 658 [2021-08-21 18:50:13,708 INFO L226 Difference]: Without dead ends: 643 [2021-08-21 18:50:13,709 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 158 SyntacticMatches, 1 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 874 ImplicationChecksByTransitivity, 4392.8ms TimeCoverageRelationStatistics Valid=344, Invalid=8968, Unknown=0, NotChecked=0, Total=9312 [2021-08-21 18:50:13,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 643 states. [2021-08-21 18:50:13,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 643 to 379. [2021-08-21 18:50:13,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 379 states, 378 states have (on average 1.0317460317460319) internal successors, (390), 378 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:13,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 379 states to 379 states and 390 transitions. [2021-08-21 18:50:13,712 INFO L78 Accepts]: Start accepts. Automaton has 379 states and 390 transitions. Word has length 190 [2021-08-21 18:50:13,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-08-21 18:50:13,712 INFO L470 AbstractCegarLoop]: Abstraction has 379 states and 390 transitions. [2021-08-21 18:50:13,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.9789473684210526) internal successors, (283), 94 states have internal predecessors, (283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-08-21 18:50:13,712 INFO L276 IsEmpty]: Start isEmpty. Operand 379 states and 390 transitions. [2021-08-21 18:50:13,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-08-21 18:50:13,713 INFO L504 BasicCegarLoop]: Found error trace [2021-08-21 18:50:13,713 INFO L512 BasicCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 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 18:50:13,760 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 18:50:13,927 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,SelfDestructingSolverStorable113 [2021-08-21 18:50:13,927 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONASSERT === [ULTIMATE.startErr0ASSERT_VIOLATIONASSERT, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION] === [2021-08-21 18:50:13,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-08-21 18:50:13,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1338956462, now seen corresponding path program 110 times [2021-08-21 18:50:13,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-08-21 18:50:13,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2003106685] [2021-08-21 18:50:13,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-08-21 18:50:13,928 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-08-21 18:50:13,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-08-21 18:50:16,282 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 0 proven. 2324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-08-21 18:50:16,282 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-08-21 18:50:16,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2003106685] [2021-08-21 18:50:16,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2003106685] provided 0 perfect and 1 imperfect interpolant sequences [2021-08-21 18:50:16,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2018572251] [2021-08-21 18:50:16,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-08-21 18:50:16,283 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-08-21 18:50:16,283 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2021-08-21 18:50:16,283 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 18:50:16,284 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process Received shutdown request... [2021-08-21 18:50:24,246 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 18:50:24,247 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 18:50:25,274 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0ASSERT_VIOLATIONASSERT [2021-08-21 18:50:25,291 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 18:50:25,298 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Ended with exit code 0 [2021-08-21 18:50:25,475 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,SelfDestructingSolverStorable114 [2021-08-21 18:50:25,475 WARN L594 AbstractCegarLoop]: Verification canceled: while BasicCegarLoop was analyzing trace of length 191 with TraceHistMax 28,while executing Executor. [2021-08-21 18:50:25,476 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr0INUSE_VIOLATION [2021-08-21 18:50:25,477 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr1INUSE_VIOLATION [2021-08-21 18:50:25,477 INFO L764 garLoopResultBuilder]: Registering result TIMEOUT for location ULTIMATE.startErr2INUSE_VIOLATION [2021-08-21 18:50:25,479 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-08-21 18:50:25,479 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-08-21 18:50:25,481 INFO L202 PluginConnector]: Adding new model multiply-verify.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.08 06:50:25 BasicIcfg [2021-08-21 18:50:25,481 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-08-21 18:50:25,481 INFO L168 Benchmark]: Toolchain (without parser) took 720059.12 ms. Allocated memory was 183.5 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 163.9 MB in the beginning and 832.9 MB in the end (delta: -669.0 MB). Peak memory consumption was 1.4 GB. Max. memory is 8.0 GB. [2021-08-21 18:50:25,481 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.40 ms. Allocated memory is still 183.5 MB. Free memory is still 165.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2021-08-21 18:50:25,481 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.96 ms. Allocated memory is still 183.5 MB. Free memory was 163.9 MB in the beginning and 162.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2021-08-21 18:50:25,481 INFO L168 Benchmark]: Boogie Preprocessor took 17.03 ms. Allocated memory is still 183.5 MB. Free memory was 162.4 MB in the beginning and 161.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2021-08-21 18:50:25,482 INFO L168 Benchmark]: RCFGBuilder took 262.95 ms. Allocated memory is still 183.5 MB. Free memory was 161.4 MB in the beginning and 148.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. [2021-08-21 18:50:25,482 INFO L168 Benchmark]: TraceAbstraction took 719754.06 ms. Allocated memory was 183.5 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 148.0 MB in the beginning and 832.9 MB in the end (delta: -684.9 MB). Peak memory consumption was 1.4 GB. Max. memory is 8.0 GB. [2021-08-21 18:50:25,482 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 0.40 ms. Allocated memory is still 183.5 MB. Free memory is still 165.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 19.96 ms. Allocated memory is still 183.5 MB. Free memory was 163.9 MB in the beginning and 162.4 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 17.03 ms. Allocated memory is still 183.5 MB. Free memory was 162.4 MB in the beginning and 161.4 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 262.95 ms. Allocated memory is still 183.5 MB. Free memory was 161.4 MB in the beginning and 148.4 MB in the end (delta: 13.0 MB). Peak memory consumption was 13.6 MB. Max. memory is 8.0 GB. * TraceAbstraction took 719754.06 ms. Allocated memory was 183.5 MB in the beginning and 1.4 GB in the end (delta: 1.2 GB). Free memory was 148.0 MB in the beginning and 832.9 MB in the end (delta: -684.9 MB). Peak memory consumption was 1.4 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: 700, positive: 662, positive conditional: 662, positive unconditional: 0, negative: 38, negative conditional: 38, negative unconditional: 0, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , ThreadSeparatingIndependenceRelation.Statistics on underlying relation: CachedIndependenceRelation.Independence Queries: [ total: 681, positive: 662, positive conditional: 0, positive unconditional: 662, negative: 19, negative conditional: 0, negative unconditional: 19, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 163, positive: 160, positive conditional: 0, positive unconditional: 160, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 163, positive: 160, positive conditional: 0, positive unconditional: 160, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 30, positive: 0, positive conditional: 0, positive unconditional: 0, negative: 30, negative conditional: 0, negative unconditional: 30, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 681, positive: 502, positive conditional: 0, positive unconditional: 502, negative: 16, negative conditional: 0, negative unconditional: 16, unknown: 163, unknown conditional: 0, unknown unconditional: 163] , Statistics on independence cache: Total cache size (in pairs): 163, Positive cache size: 160, Positive conditional cache size: 0, Positive unconditional cache size: 160, Negative cache size: 3, Negative conditional cache size: 0, Negative unconditional cache size: 3, Independence queries for same thread: 19 - 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: 68]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was analyzing trace of length 191 with TraceHistMax 28,while executing Executor. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 191 with TraceHistMax 28,while executing Executor. - TimeoutResultAtElement [Line: 62]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 191 with TraceHistMax 28,while executing Executor. - TimeoutResultAtElement [Line: 61]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was analyzing trace of length 191 with TraceHistMax 28,while executing Executor. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 7 procedures, 55 locations, 4 error locations. Started 1 CEGAR loops. OverallTime: 719666.1ms, OverallIterations: 115, TraceHistogramMax: 28, EmptinessCheckTime: 74.8ms, AutomataDifference: 71788.1ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 172.7ms, PartialOrderReductionTime: 146.7ms, HoareTripleCheckerStatistics: 7245 SDtfs, 12196 SDslu, 218429 SDs, 0 SdLazy, 120650 SolverSat, 2951 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 38966.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16631 GetRequests, 10035 SyntacticMatches, 106 SemanticMatches, 6490 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101967 ImplicationChecksByTransitivity, 143986.7ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=379occurred in iteration=114, InterpolantAutomatonStates: 3967, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 316.2ms AutomataMinimizationTime, 114 MinimizatonAttempts, 12506 StatesRemovedByMinimization, 113 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 804.5ms SsaConstructionTime, 3738.1ms SatisfiabilityAnalysisTime, 218270.4ms InterpolantComputationTime, 23741 NumberOfCodeBlocks, 23741 NumberOfCodeBlocksAsserted, 1043 NumberOfCheckSat, 23517 ConstructedInterpolants, 72 QuantifiedInterpolants, 220605 SizeOfPredicates, 448 NumberOfNonLiveVariables, 21615 ConjunctsInSsa, 5654 ConjunctsInUnsatCore, 224 InterpolantComputations, 4 PerfectInterpolantSequences, 43147/172591 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